HP WL520 User Manual

hp WL520 enterprise access point user guide

contents

contentscontents

1 introducing the hp

introducing the hp WL520 enterprise access point

11 introducing the hpintroducing the hp

wireless networking concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

management and monitoring capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

http interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

command line interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

802.11b versus 802.11a networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

feature list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

cell size and coverage area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

auto channel select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

installation and initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

igu p

configuring the hp WL520 enterprise access point2conf ring the h

configuring the hpconfiguring the hp

overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

set basic configuration parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

download the latest software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

setup your tftp server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7

download updates to your tftp server from the web interface . . . . . . . . . . . . . . . . . . . . . . . . . .2-7

backup your hp WL520 configuration file . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

copy a configuration file from another hp WL520 unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

WL520

WL520520

WL520

WL520WL520

enterprise access point

enterprise access point enterprise access point

enterprise access point

enterprise access point enterprise access point

other network settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

configure the hp WL520 device as a dhcp server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

maintain 802.11b client connections using link integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

change your wireless interface settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

802.11a wireless interface card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

802.11b wireless interface card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

auto channel select (acs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

distance between aps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

multicast rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

ethernet settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

set ethernet speed and transmission mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

configure your management interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

set http interface management services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

configure serial port interface settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

other security configuration settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

configure your mac (address) access control table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

radius authentication settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

IEEE 802.1x security mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

if you encounter problems... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

333m agi hp

an ng the 5203 managing the hp WL520 enterprise access point

managing the hpmanaging the hpWLWL520WL520

enterprise access point

enterprise access point enterprise access point

in this chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

management interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

monitoring network statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

view hardware/software component information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

monitoring icmp statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

monitoring ip/arp statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

monitoring learn table statistics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

monitoring iapp statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

monitoring radius server statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

monitoring interfaces statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

monitoring remote link test statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

issuing system commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

upload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

reboot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

help link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

4 configuring advanced featuresconfigurin ad nced fe

configuring advanced featuresconfiguring advanced features

g va atures

network settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

advanced dhcp server configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

dhcp ip pool table settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

link integrity settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

vlan support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4

typical vlan configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

vlan workgroups and traffic management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

typical user vlan configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

typical vlan management id configuration scenarios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

management settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8

setting new passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

managing ip access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

configuring management service interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

setting filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11

setting the ethernet protocol filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

advanced filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

alarms (snmp traps) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-13

alarm (trap) groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

alarm host table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

bridge configuration settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14

spanning tree protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15

broadcast storms and storm thresholds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15

wireless distribution system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16

wds setup procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17

wireless port mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17

advanced security settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18

wireless security - eap overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19

mac access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19

radius authentication tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20

555roub ooting

5 troubleshootingt lesh

troubleshootingtroubleshooting

troubleshooting concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

symptoms and solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

connectivity issues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

basic software setup and configuration problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

client connection problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

vlan operation issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

recovery procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

reset to factory default procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

forced reload procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

initialize the hp WL520 using the bootloader cli. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

setting ip address using serial port and normal cli . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

system alarms (traps) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-8

security alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

wireless interface card alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

operational alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

flash memory alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

tftp alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

image alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

standard MIB-II (rfc 1213) alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

bridge MIB (rfc 1493) alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

related applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-9

radius authentication server. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

tftp server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

led indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-9

iii

666sing mand line interface

6 using the command line interfaceu the com

using the command line interfaceusing the command line interface

introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

prerequisite skills and knowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

notation conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

important terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

navigation and special keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

cli error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

command line interface (cli) variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3

bootloader cli . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

cli command types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-4

operational cli commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

parameter control commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

using tables & user strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-10

working with tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

using strings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11

configuring objects that require reboot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11

“set” cli command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11

“show” cli command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

configuring the hp WL520 unit using cli commands . . . . . . . . . . . . . . . . . . . . . . . . . .6-12

log into the hp WL520 unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

log into the hp WL520 unit using Hyperterminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

set basic configuration parameters using cli commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13

other network settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-14

configure the hp WL520 device as a dhcp server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15

maintain 802.11b client connections using link integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15

change your wireless interface settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15

set interface management services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17

mac access control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18

radius authentication settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18

parameter tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-19

system parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20

inventory management information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20

network parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20

wireless interface parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21

snmp parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22

snmp ip access table parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22

snmp host table parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22

primary and backup radius server table parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23

telnet parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23

serial port parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24

tftp server parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24

http (web browser) parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24

link integrity group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24

link integrity ip target table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25

wireless interface security table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25

ethernet filtering table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25

iapp parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26

static mac address filter table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26

spanning tree parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26

spanning tree priority and path cost for each interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27

storm threshold parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27

storm threshold table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27

mac access control table parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27

dhcp server parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28

dhcp server table for ip pools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28

spectralink voip parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28

7 recording your configuration settingsrecording your configuration setting

77srecording your configuration settingsrecording your configuration settings

8 specificationsspecifications

88 specificationsspecifications

hardware specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

radio specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

802.11b channel frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

802.11a channel frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

wireless communication range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

IIntro ing he

ntroducing the hp WL520 enterprise access point

duc

ntroducing thentroduci thhphphp

in this chapter

in this chapterin this chapter

Q Wireless Networking Concepts Q Management and Monitoring Capabilities Q 802.11b versus 802.11a Networks Q Installation and Initialization

NOTE:

Remember to review the contents of this manual, especially sections on information you need, before performing an operation.

wireless networking concepts

wireless networking conceptswireless networking concepts

The HP WL520 provides wireless access to network infrastructures. As wireless clients move from one coverage cell to another, HP WL520 units automatically allow client roaming within the same subnet. Figure 1-1 illustrates a typical network configuration.

To determine the best location for the Base Station units, we recommend conducting a Site Survey before placing the devices in their final locations. For information about how to conduct a Site Survey, contact your local reseller.

Before the HP WL520 unit can be configured for your specific networking requirements, it must first be initialized. Initialization consists of setting a static IP address and the appropriate IP mask for the HP WL520 unit so that you can recognize it once it is located in your network.

e L520

WL520

WL520W

enterprise access point

enterprise access point enterprise access point

Figure 1-1

Figure 1-1 Standalone wireless network access infrastructure

gur

Figure 1-1Fi e 1-1

From there, the network administrator can configure each unit according to the requirements for the network. The HP WL520 Enterprise Access Point (HP WL520) functions as a wireless network access point to data networks. HP WL520 networks provide:

To be fully operational, the HP WL520 needs at least one HP Wireless LAN PC Card.

Standalone wireless network access infrastructure

Standalone wireless network access infrastructure Standalone wireless network access infrastructure

Q Seamless client roaming Q Easy installation and operation Q Over-the-air encryption of data Q High speed network links

1-1

Manageme nt and Monitoring Capabilities

NOTE:

PC Cards are not included with your kit and must be ordered as separate items.

management and monitoring capabilities

management and monitoring capabilitiesmanagement and monitoring capabilities

To configure the HP WL520 for your needs, set your specific network, wireless interface, and bridge parameters. The HTTP (web browser) Interface provides easy configuration and management.

Wireless clients (computers connected to your network through a radio PC Card) use access. Once connected, users can roam from one coverage cell to another while maintaining their connection.

There are three management and monitoring interfaces available to the network administrator to configure and manage the HP WL520 device(s) in the network:

1. HTTP Interface

2. Command Line Interface

3. Full SNMP Configuration capabilities

http interface

http interfacehttp interface

The HTTP Interface (Web browser Interface) provides easy access to configuration settings and network statistics from any computer in the network. Use the HTTP Interface through your LAN (switch, hub, etc.) through the Internet, or with a "crossover" Ethernet cable connected directly to your computer’s Ethernet Port.

C ient Manager

software for network

command line interface

command line interfacecommand line interface

The Command Line Interface (CLI) represents a set of keyboard commands and parameters used for configuring and managing the HP WL520.

Users enter Command Statements, composed of CLI Commands and their associated parameters. Statements may be issued from the keyboard for real time control, or from scripts that automate configuration.

download

For example, when downloading a file, administrators enter the and file type parameters.

Q If necessary, use the CLI with your computer serial port to initialize the proper IP address for your network. Q The CLI provides configuration and management access for most generic Telnet and Terminal clients. Use the CLI

through your computer serial port, over your LAN, through the Internet, or with a "crossover" Ethernet cable connected directly to your computer.

Details of the CLI commands used to manage the HP WL520 device along with syntax and specific parameters names can be found in

Using the Command Line Interface.

download CLI Command along with IP Address, file name,

downloaddownload

1-2

802.11b vers us 802.11a Networks

802.11b versus 802.11a networks

802.11b versus 802.11a networks802.11b versus 802.11a networks

The HP WL520 supports 802.11wireless connectivity through the use of an 802.11a-compliant 5 GHz and 802.11bcompliant 2.4 GHz radio technology. The IEEE 802.11a standard adds support for a high-speed wireless physical layer in the 5 GHz band using Orthogonal Frequency Division Multiplexing (OFDM). The standard requires support for data rates of 6, 12, 24, and 54 Mbits/s. The HP WL520 unit supports the following data rates: 6, 9, 12, 18, 24, 36, 54 Mbits/s. The IEEE

802.11b standard supports wireless physical layer in the 2.4 GHz band using Direct Sequence Spread Spectrum (DSSS). The standard provides for data rates of 1, 2, 5.5, and 11 Mbits/s.

feature list

feature listfeature list

The IEEE standards that governs wireless communications are different for the 2.4 GHz band and the 5 GHz band. The table below compares the software features supported for each type of card in the HP WL520 device:

feature

fe r

featureatu e

Number of stations per BSS up to 250 up to 50 HTTP Server yes yes Telnet / CLI yes yes SNMP Agent yes yes VLAN Support (2 User VLANs) yes yes Emergency Reset to Default Configuration yes yes DHCP Client yes yes DHCP Server yes yes TFTP yes yes RADIUS Access Control yes yes

802.1X (EAP-MD5, EAP-TLS and EAP-TTLS) yes yes

802.1d bridging yes yes MAC Access Control Table yes yes Protocol Filtering yes yes Multicast/Broadcast Storm Filtering yes yes Proxy ARP yes yes Configuration Support for MAC Features yes yes ICMP Echo Response yes yes Hardware Watchdog Timer yes yes Roaming yes yes Link Integrity yes yes Automatic Channel Select yes yes WEP yes yes WEP Plus (Weak Key Avoidance) yes No client support for 802.11a WDS Relay yes Remote Link Test yes Link Test Responder yes No client support for 802.11a Medium Density Distribution yes Distance between AP's yes Ultra High Density yes Closed System yes Interference Robustness yes Load Balancing yes No client support for 802.11a AP List yes No client support for 802.11a SpectraLink VoIP Support yes Fragmentation yes

2 hz

.4 g

2.4 ghz 5 gh5 ghz comments

2.4 ghz2.4

ghz

5 ghz5 ghz

comments

commentscomments

The HP WL520 device can be used with any combination of 802.11a and 802.11b radio cards. Note however, that only one

802.11a card with antenna adapter can be plugged into the HP WL520 unit at one time. You can have an 802.11a and an

802.11b card present in the HP WL520 device at the same time and 2.4 GHz and 5 GHz clients will be supported simultaneously.

1-3

802.11b vers us 802.11a Networks

cell size and coverage area

cell size and coverage areacell size and coverage area

The coverage area achieved with the 2.4 GHz card type is larger than that of a 5 GHz radio card. The transmit rate is higher in the smaller (2.4 GHz) cell than the larger (5 GHz cell). The following illustrations depict the difference in cell sizes and the way that cell size affects coverage area.

Figure 1-2

Figure 1-2 802.11a (5 GHz) Cell Size

Figure 1-2Figure

Figure 1-3 802.11a versus 802.11b Coverage Area

Figure 1-3

Figure 1-3Figure

802.11a (5 GHz) Cell Size

1-2

802.11a (5 GHz) Cell Size 802.11a (5 GHz) Cell Size

802.11a versus 802.11b Coverage Area

1-3

802.11a versus 802.11b Coverage Area 802.11a versus 802.11b Coverage Area

1-4

Installation and Initialization

auto channel select

auto channel selectauto channel select

The Access Point selects its own frequency channel, based on interference situation, bandwidth usage and adjacent channel use, using the Auto Channel Select feature. This is beneficial when deploying HP WL520 units in a new environment or adding an HP WL520 unit in an existing environment.

The default channel for the 5 GHz radio card is 52 - 5260 MHz. When a second HP WL520 unit is turned on in the vicinity of the currently active HP WL520 device, the Auto Channel Select feature changes the frequency channel of the second unit so there is no interference between the units. Multiple HP WL520 units can be turned on simultaneously to establish proper channel selection.

Physical Layer Type (Modulation Type)

Auto Channel Select Enable (default)

Frequency Channel 1 - 2.412 GHz

Distance Between APs Large (default)

Multicast Rate 1 Mbit/sec

Interference Robustness Enable (default)

Closed System Enable

Load Balancing Enable (default)

Medium Density Distribution Enable (default)

DSSS (Direct Sequence Spread Spectrum)

Disable

2 - 2.417 GHz 3 - 2.422 GHz (default FCC, ETSI, Japan) 4 - 2.427 GHz 5 - 2.432 GHz 6 - 2.437 GHz 7 - 2.422 GHz 8 - 2.447 GHz 9 - 2.452 GHz 10 - 2.457 GHz 11 - 2.462 GHz

12 - 2.467 GHz (ETSI countries only) 13 - 2.472 GHz

14 - 2.477 GHz (Japan only)

For France, channels 10-13 only

Medium Small Minicell Microcell

2 Mbits/sec

5.5 Mbits/sec (default) 11 Mbits/sec

Disable

Disable (default)

Disable

2.4 ghz

2.4 ghz2.4 ghz

(802.11b)

(802.11b)(802.11b)

5 ghz

5 ghz5 ghz

(802.11a)

(802.11a)(802.11a)

ODFM (Orthogonal Frequency Division Multiplexing)

Enable (default) Disable

36 - 5.180 GHz 40 - 5.200 GHz 44 - 5.220 GHz 48 - 5.240 GHz 52 - 5.260 GHz (default) 56 - 5.280 GHz 60 - 5.300 GHz 64 - 5.320 GHz

These channels are only valid in US/Canada, and Japan at this time.

N/A

0 - Auto Fallback (default) 6 Mbit/sec 9 Mbits/sec 12 Mbits/sec 18 Mbits/sec 24 Mbits/sec 36 Mbits/sec 48 Mbits/sec 54 Mbits/sec

N/A

installation and initialization

installation and initialization installation and initialization

The HP WL520 is designed to support both 2.4 GHz (IEEE 802.11b) radio cards and 5 GHz (IEEE 802.11a) radio cards. The 5 GHz card for the HP WL520 has an antenna adapter which snaps into place on the existing wall mounting bracket. Refer to the printed Quick Start Guide provided in you kit for instructions on installing the Base Station hardware and initializing the unit for your network.

1-5

Conf ng the hp WL520 enterprise access point

overview

overviewoverview

in this chapter

in this chapterin this chapter

iguri

onfiguring the hp

onfiguring theonfiguring the hphp

Since each network is unique, the HP WL520 must be configured to operate in your network environment. Most administrators use the HTTP Interface (web browser) for configuration; however, the Command Line Interface (CLI)

provides the same functionality by entering CLI Commands or scripts from Terminal and Telnet sessions. For information about using the CLI, please refer to

In some scenarios described in this chapter, you need to make configuration choices (for example, which radio channel to use). This guide explains each choice. When in doubt, we suggest you accept the default values.

Q Prerequisites Q Set Basic Configuration Parameters Q Download the latest software

– Setup your TFTP server – Download updates to your TFTP server from the Web interface – Backup your hp WL520 configuration file – Copy a configuration file from another hp WL520 unit

Q Other Network Settings

– Configure the hp WL520 device as a DHCP Server – Maintain 802.11b Client Connections using Link Integrity

Q Change your Wireless Interface Settings

– 802.11a Wireless Interface Card – 802.11b Wireless Interface Card – Auto Channel Select (ACS) – Distance Between APs – Multicast Rate

Q Ethernet Settings

– Set Ethernet Speed and Transmission Mode

Q Configure your Management Interfaces

– Set HTTP Interface Management Services – Configure Serial Port Interface Settings

Q Other Security Configuration Settings

– Configure your MAC (Address) Access Control Table – RADIUS Authentication Settings – IEEE 802.1x Security Mode

Q If you encounter problems...

Using the Command Line Interface.

WL520

WL520WL520

enterprise access point

enterprise access pointenterprise access point

2-1

Prerequisites

prerequisites

prerequisitesprerequisites

Before configuring the HP WL520, you need to gather certain network information. The following section identifies the information you need. A form has been provided at the end of this guide for you to document the configuration settings of each of the HP WL520 units in your network. Refer to Recording Your Configuration Settings.

Network Name (SSID of the wireless cards) Each wireless interface of your HP WL520 must be given a Network Name before users can sign on.

(HTTP) Password Each HP WL520 requires a read/write password to access the web interface. The default password is

Authentication Method A primary authentication server may be configured; a backup authentication server is also optional. The

Authentication Server Shared Secret This is a kind of password shared between the HP WL520 and the RADIUS authentication server (so both

Authentication Server Authentication Port This is a port number (default is 1812) and is typically provided by the network administrator.

Client IP Address Pool Allocation Scheme The HP WL520 can automatically provide IP addresses to clients as they sign on. The network

DNS Server IP Address The network administrator typically provides this IP Address.

This is not the same as the System Name, which applies only to the HP WL520 unit. This may apply to the isolated unit, the immediate, active network, or to multiple networks. The network administrator typically provides the Network Name(s).

"public".

network administrator typically provides this information.

passwords must be the same), and is typically provided by the network administrator.

administrator typically provides the IP Pool range.

NOTE:

Client Manager software comes with the PC Cards used in wireless client computers. The current network profile on the wireless client must contain a valid Network Name; in other words, one of the case-sensitive Network Names defined in the HP WL520 PC Card "Wireless Interface" properties. For more information, please refer to the PC Card documentation.

set basic configuration parameters

set basic configuration parametersset basic configuration parameters

Once you have a valid IP Address assigned to your HP WL520 and an Ethernet connection, use your web browser to configure the HP WL520 through the Web Interface.

1. Ensure any proxies are turned off. Open your browser and enter the IP Address. Press ENTER. Result: The HP WL520

WL520

WL520WL520

unit using the web interface

unit using the web interface unit using the web interface

ENTER

ENTERENTER

NOTE:

Leave the User Name field empty

2. Enter public in the Password field. Result: The System Status screen appears.

3. Click the Configure operation button. Result: The System Configuration screen appears. Each tab contains information

for specific configuration categories.

Figure 2-1

Figure 2--1 Configuration through the Web Interface

gur

Figure 2-1Fi e 2 1

User Name

User NameUser Name

Password

PasswordPassword

Configure

ConfigureConfigure

Configuration through the Web Interface

Configuration through the Web Interface Configuration through the Web Interface

2-2

Set Basic Configuration Parameters

You are now ready to configure each HP WL520 category, depending on your system. In some cases, you will not need to make any changes. If you are in doubt about any setting, we recommend that you use the default values.

Figure 2-2

Figure 2-2 Configuration Options

Figure 2-2Figure 2-2

To set properties for each category, click on the desired tab. Result: The selected configuration screen appears. Each configuration screen allows you to select options, or enter, edit, and delete information.

In some cases, the HP WL520 reminds you that it must be rebooted for a change to take effect. In a given session, you can wait to reboot until all changes have been made.

After entering or editing information on configuration screens, click OK to save changes, or click CanceCancel to restore previous settings.

You will want to set up a few basic configuration parameters right away when you receive the HP WL520 unit. For example:

– System name and location – Contact information for network administrator – IP Address – Communication rules for your wireless interface(s) – Passwords for the different management interfaces (SNMP, Telnet, HTTP) – If you need to upload the latest software, you will also want to setup your TFTP server to communicate with the

Configuration Options

Configuration Options Configuration Options

OKOK

HP WL520 device. This process is described in downloading the latest software, under

CancelCancel

Setup your TFTP server.

2-3

set system name, location and contact information

set system name, location and contact informationset system name, location and contact information

Set Basic Configuration Parameters

Figure 2-3

Figure 2-3 System Configuration

Figure 2-3Figure 2-3

1. From the web interface, start by clicking on the Configure button, then the System tab.

2. Enter the name of the HP WL520 device, its location within your network or its physical location, such as “Front

set a static ip address for the

set a static ip address for the hp WL520 deevice

set a static ip address for the set a static ip address for the hphphp

1. Click on the Network tab and select the IP Address Assignment Type to Static.

2. Then enter a fixed IP Address for your HP WL520 unit, along with the IP mask and default gateway IP Address you

System Configuration

Sy io

System Configurationstem Configurat n

Configure

ConfigureConfigure

Lobby” or Engineering, the name, phone number and e-mail address of the person responsible for this device, and

click OK.

OKOK

want to use.

Network

NetworkNetwork

WL520

WL520WL520

d vice

device device

IP Address Assignment Type

IP Address Assignment TypeIP Address Assignment Type

Static

StaticStatic

System

SystemSystem

NOTE:

The IP Mask of the HP WL520 unit needs to match the IP Mask of your network. If you are setting up the HP WL520 device from a client station, check the IP mask of your computer before proceeding.

3. Click OK when finished. The HP WL520 unit will need to be rebooted for the changes to take affect.

Figure 2-4

Figure 2-4 Neetwork IP Configuration

Figure 2-4Figure 2-4

Network IP Configuration

k IP io

Network IP Configuration N twor Configurat n

2-4

Set Basic Configuration Parameters

set network names and encryption options

set network names and encryption optionsset network names and encryption options

1. Select Network Names (SSID) for the PC Cards in wireless Slots A and/or B in the HP WL520 device. Client stations use

the Network Name of the PC Card to connect to the network through the HP WL520 unit. At power up or insertion of either a 2.4 GHz or 5 GHz radio card, the HP WL520 software will automatically detect the

card type. The Configuration and Monitoring parameters displayed in the HTTP Interface will be updated accordingly. The default values will be assigned.

Figure 2-5

Figure 2-5 Wireless Interface Configuration

Figure 2-5Figu e 2-5

The HP WL520 device can be used with any combination of 2.4 GHz (802.11b) and 5 GHz (802.11a) radio cards. Note however, that only one 802.11a adapter card can be plugged into the HP WL520 unit at one time. You can have an

802.11a and an 802.11b card present in the HP WL520 device at the same time, and 2.4 GHz and 5 GHz clients will be supported simultaneously.

Wirele f igu on

ss Inter ace Conf rati

Wireless Interface Configuration Wireless Interface Configuration

NOTE:

Not all software features available for the 802.11b cards are available for the 802.11a cards.

2-5

set wep encryption for each wireless interface

set wep encryption for each wireless interfaceset wep encryption for each wireless interface

Set Basic Configuration Parameters

Figure 2-6

Figure 2--6 WEP EncryptionEP Enc on

Figure 2-6Figure 2 6

1. Click on the Security > Encryption tabs.

2. Click inside the check box to

3. Type in an

W rypti

WEP Encryption WEP Encryption

Security > Encryption

Security > EncryptionSecurity > Encryption

enable WEP encryption on a wireless card.

enable WEP encryption

enable WEP encryptionenable WEP encryption

encryption key based on the type of card present in each slot.

encryption key

encryption keyencryption key

NOTE:

The HP WL520 device supports both 40- and 128-bit cards. 40-bit cards support key lengths of 5 alphanumeric characters. 128-bit cards support key lengths of 13 alphanumeric characters.

4. Select which key to use for WEP encryption. Client stations must have the same encryption key to be able to

communicate with the HP WL520 device.

change passwords

change passwordschange passwords

1. Click on the Management tab and change the default passwords for the SNMP, Telnet/CLI, and HTTP interfaces. The

default passwords for each interface is public.

Management

ManagementManagement

NOTE:

We strongly urge your to change the default passwords to restrict access to your network devices to authorized personnel. We also recommend that you document your HP WL520 configuration using the work sheets provided for you in Recording Your Configuration Settings. If you lose or forget your password settings, you can always perform

Reset to Factory Default procedure.

the

2-6

Download the latest software

download the latest software

download the latest softwaredownload the latest software

There are three types of files that can be downloaded to the HP WL520 from a TFTP server:

— img (AP software image or kernel) — config (configuration file) — bspbl (BSP/Bootloader firmware file)

The latest updates on software and documentation can be found on the HP web site at:

setup your tftp server

setup your tftp serversetup your tftp server

The “Trivial File Transfer Protocol” (TFTP) server allows you to transfer files across a network. You can upload files from the HP WL520 for backup or copying, and you can download the files for configuration and AP Image upgrades. The TFTP software is located on the HP WL520 Installation CD-ROM.

If a TFTP server is not configured and running, you will not be able to download and upload images and configuration files to/from the HP WL520. Remember that the TFTP server does not have to be local, so long as you have a valid TFTP IP Address. TFTP does not have to be running for HP WL520 operations that do not transfer files.

After the TFTP server is installed:

Q Check to see that TFTP is configured to point to the directory containing the AP Image. Q Make sure you have the proper TFTP server IP Address, the proper AP Image file name, and that the TFTP server is

connected.

0DNHVXUHWKH7)73VHUYHULVFRQILJXUHGWRERWK7UDQVPLWDQG5HFHLYHILOHVZLWKQRDXWRPDWLFVKXWGRZQRU

0DNHVXUHWKH7)73VHUYHULLV

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PHRXW

WLPHRXW

FRQILJXUHGWRERWK7UDQVPLWDQG5HFH YHI HVZLWKQRDXWRPDW FVKXWGRZQR

FRQILJXUHGWRERWK7UDQVPLWDQG5HFHLLYHILLOOHVZLWKQRDXWRPDWLLFVKXWGRZQRUU0DNHVXUHWKH7)73VHUYHU V

http://www.hp.com.

download updates to your tftp server from the web interface

download updates to your tftp server from the web interfacedownload updates to your tftp server from the web interface

1. Make sure the TFTP server is running and pointing to the directory containing the desired file.

2. Open the web interface of the HP WL520 device.

3. Click on the

4. Type in the IP address of your TFTP server.

5. Type in the file name and select the file type from the pull down menu.

6. Click

Figure 2-7

Figure 2-7 Download Software Image from TFTP Server

Figure 2-7Figure 2-7

Commands

Commands button; select the Download tab.

CommandsCommands

OK to download this information from the TFTP server to the HP WL520 unit.

OK OK

Download Software Image from TFTP Server

Download Software Image from TFTP Server Download Software Image from TFTP Server

Download

DownloadDownload

2-7

Download the latest software

backup your

backup yourbackup yourhphphp

1. Make sure the TFTP server is running and pointing to the directory where you want to save the file.

2. Open the web interface of the HP WL520 device.

3. Click on the

4. Type in the IP address of your TFTP server.

5. Type in a descriptive name for your configuration file.

6. Select the file type as

7. Click OK to upload this information from your HP WL520 unit to the TFTP server, where it can be retrieved in the event

you reset your HP WL520 device to factory defaults at some time.

WL520

WL520 configuration filebackup your hp

WL52020

WL5

Commands

Commands button; select the Upload tab.

CommandsCommands

OK OK

configuration file

configuration file configuration file

config from the pull down menu.

config

configconfig

Upload

UploadUpload

NOTE:

Record the name of this configuration file and the IP address of the HP WL520 unit so you can easily find it if you need to download it.

copy a configuration file from another

copy a configuration file from another copy a configuration file from another hphp

You can configure multiple units using the same configuration file by uploading the configuration file from one HP WL520 unit to the TFTP server, and then download the configuration file to other HP WL520 units.

WARNING:

o i ur o eDo not use a static IP address in this c nf g ati n l , otherwise you w l end up w th duplicate IP add e ses in your

network!

1. Check to ensure Dynamic IP address is enabled by clicking the Configure button and selecting the IPConfig tab. Then open the Web interface from the HP WL520 unit with the desired configuration and click the

2. Select the

Upload tab and enter the IP address of your TFTP server.

Upload

UploadUpload

WL520

WL520WL520it unit unit

unithp WL520 un

fi il i r s

Configure

ConfigureConfigure

Commands

Commands button.

CommandsCommands

Figure 2-8

Figure 2-8 Upload Configuration File to TFTP Server

gur

Figure 2-8Fi e 2-8

3. Enter the name of your configuration file and click

4. Wait for the file to transfer from the HP WL520 device to the TFTP server.

5. Access the HP WL520 unit to which you will download the configuration. A system window will notify you when this process is complete. Confirm by clicking

6. Click on the Commands button, then select the Download tab.

7. Verify the IP address of your TFTP server and enter the name of the file you wish to transfer (refer to Step 3).

8. Set the file type to

9. The unit will need to be rebooted for the changes to take affect.

10. Repeat this procedure for all the HP WL520 units you want to configure using this specific file.

Upload Configuration File to TFTP Server

Upload Configuration File to TFTP Server Upload Configuration File to TFTP Server

Commands

CommandsCommands

config, and click OK. Click Download.

config

configconfig

OKOK

OK.

OKOK

OK.

OKOK

Download

DownloadDownload

Download

DownloadDownload

2-8

Other Networ k Settings

other network settings

other network settingsother network settings

You may want to set other configuration parameters for your HP WL520 unit, such as: – Configure the HP WL520 device as a DHCP server – Maintain 802.11b client connections using Link Integrity checking – Change your Wireless Interface settings – Configure which physical interface will be used to manage the HP WL520 unit – Control access to the HP WL520 device using MAC Address authentication, WEP encryption or 802.1x security settings Refer to

Configuring Advanced Features for more complex network settings.

configure the

configure the hphp WL520 device as a dhcp server

configure theconfigure thehphp

Use DHCP configuration to provide dynamic client IP Addresses from one or more IP Pool Tables. Enable the DHCP Server to allow the HP WL520 to assign clients IP Addresses from IP Pool Tables. Deselect the Status check box to prevent client IP Address assignment from the HP WL520.

WL520

WL520WL520

device as a dhcp server

device as a dhcp server device as a dhcp server

NOTE:

You must have at least one entry in the DHCP Server client IP Address assignment table before you can enable the DHCP Server Status feature.

Figure 2-9

Figure 2-9 Network Configuration Screens - DHCP Server

Figure 2-9Figure 2-9

1. From the HTTP interface, click on the

2. Click on the

3. Enter the following information:

Network Configuration Screens - DHCP Server

Network Configuration Screens - DHCP Server Network Configuration Screens - DHCP Server

Add button in the IP Pool Table.

Add

AddAdd

— Start IP AddressS t I

———tar P Address

Start IP AddressStart IP Address

—End I Add

End IP Addresss

—

— Default Lease Time (optional) - the default time value for clients to retain the assigned IP Address. DHCP

—

— —

P re s

End IP AddressEnd IP Address

Default Lease Time

Default Lease TimeDefault Lease Time

automatically renews IP Addresses without client notification. Default is 86400 seconds.

Maximum Lease Time (optional) - the maximum time value for clients to retain the assigned IP Address. DHCP

Maximum Lease Time

Maximum Lease TimeMaximum Lease Time

automatically renews IP Addresses without client notification. Default is 86400 seconds.

Comment (optional)

Comment

CommentComment Status - IP Pools are enabled upon entry in the table. Use the Edit button to disable or delete existing table entries.

Status

StatusStatus

Configure

Configure button and select the Network > DHCP Server tabs.

ConfigureConfigure

Network > DHCP Server

Network > DHCP ServerNetwork > DHCP Server

Edit

EditEdit

2-9

Other Networ k Settings

4. Enter the Default Gateway IP Address, the Primary and Secondary DNS IP Addresses, and select the Enable DHCP Server check box.

5. Reboot the HP WL520 unit for the changes to take affect.

maintain 802.11b client connections using link integrity

maintain 802.11b client connections using link integritymaintain 802.11b client connections using link integrity

Default Gateway IP Address

Default Gateway IP AddressDefault Gateway IP Address

Primary

PrimaryPrimary

Secondary DNS IP Addresses

Secondary DNS IP AddressesSecondary DNS IP Addresses

Enable DHCP Server

Enable DHCP ServerEnable DHCP Server

NOTE:

This feature is only applicable to 2.4 GHz (802.11b) cards.

The Link Integrity feature checks the link between the HP WL520 and the nodes on the backbone. These nodes are listed by their IP address on the Link Integrity IP Address Table, and serve as backup. If the link goes down, the client will connect to another HP WL520 in your network that still communicates with the server.

Figure 2-10

Figure 2-10 Liink Integriitty

Figure 2-10Figure 2-10

configure link integrity

configure link integrityconfigure link integrity

1. From the HTTP interface, click on the Configure button and select the Network > Link Integrity tabs.

2. Click the

3. Enter the IP Address of the host computer you want to check and add comments to identify the computer if you wish. This Target IP Address is enabled as soon as it is entered in the table. Click

4. Set the following parameters as needed: –

–

5. Click to select the

disable link integrity

disable link integritydisable link integrity

Q To disable Link Integrity check for all clients, deselect the Enable Link Integrity check box. Q To disable Link Integrity check to a certain host computer, click on the Edit button in the Tarrget IP Address Table and set the et I

Status

StatusStatus

L nk Integr y

Link Integrity Link Integrity

Configure

ConfigureConfigure

Edit button in the Target IP Address Table.

Edit

EditEdit

Poll Interval - the interval between link integrity checks. Range is 500 - 15000 ms in increments of 500 ms; default is

Poll Interval

Poll IntervalPoll Interval

500 ms.

Poll Retransmissions - the number of times a poll should be retransmitted before the link is considered down.

Poll Retransmissions

Poll RetransmissionsPoll Retransmissions

Enable Link Integrity check box.

Enable Link Integrity

Enable Link IntegrityEnable Link Integrity

to Disable.

Target IP Address Table

Target IP Address TableTarget IP Address Table

Enable Link Integrity

Enable Link IntegrityEnable Link Integrity

Network > Link Integrity

Network > Link IntegrityNetwork > Link Integrity

OK.

OKOK

Edit

EditEdit

TTTa g P Address Table

arget IP Address Tablearget IP Address Table

2-10

Change your Wireless Interface Settings

change your wireless interface settings

change your wireless interface settingschange your wireless interface settings

Depending on the type of wireless PC Card installed in the HP WL520 device, the configuration options will be different. Some parameters are the same for 802.11a and 802.11b cards. Others are unique to each card type.

You can setup an HP WL520 unit using the following combinations of wireless cards:

1. single 802.11a card with the attached antenna adapter

2. single 802.11b card

3. two 802.11b cards (one in each slot)

4. one 802.11a card with attached antenna and one 802.11b card

802.11a wireless interface card

802.11a wireless interface card802.11a wireless interface card

Figure 2-11

Figure 2-11 802.11a Wireless Interface Options

Figure 2-11Figure 2-11

Network Name

– Network Name. Enter a Network Name for each PC Card. This is the same name used on client machines to connect using

Network NameNetwork Name

the Client Manager software.

Enable Auto Channel Select (ACS). By default this feature is enabled. The HP WL520 device will scan the area for other

Enable Auto Channel Select (ACS)

–

Enable Auto Channel Select (ACS)Enable Auto Channel Select (ACS)

HP WL520 devices and select a free or relatively unused communication channel. This helps prevent interference problems and increases the performance of the network.

–

Frequency Channel. Use the pull-down menu to select the desired card frequency. Ensure nearby devices do not use the

Frequency Channel

Frequency ChannelFrequency Channel

same frequency. The Frequency Channels available will depend on the card type and the country of use. Refer to

Specifications for details.

– Transmit Rate. Use the pull-down menu to select a specific transmit rate for the 802.11a card. Choose between 6, 9, 12,

Transmit Rate

Transmit RateTransmit Rate

18, 24, 36, 48, 54 Mbits/s, or Auto Fallback. The Auto Fallback feature allows the HP WL520 unit to select the best transmit rate based on the cell size.

–

DTIM Period. Deferred Traffic Indicator Map (DTIM) is used with clients that use power management. DTIM should be left at

DTIM Period

DTIM PeriodDTIM Period

the default value.

–

RTS/CTS Medium Reservation. This value affects message flow control, and should not be changed under normal

RTS/CTS Medium Reservation

RTS/CTS Medium ReservationRTS/CTS Medium Reservation

circumstances. Range is 2347 (on), 500 (off).

802.11a Wireless Interface Options

802.11a Wireless Interface Options 802.11a Wireless Interface Options

Radio

2-11

802.11b wireless interface card

802.11b wireless interface card802.11b wireless interface card

Change your Wireless Interface Settings

Figure 2-12

Figure 2-12 802.11b Wireless Interface Options

Figure 2-12Figure 2-12

Network Name

– Network Name. Enter a Network Name for each PC Card. This is the same name used on client machines to connect using

Network NameNetwork Name

802.11b Wireless Interface Options

802.11b Wireless Interface Options 802.11b Wireless Interface Options

the Client Manager software.

–

Enable Auto Channel Select (ACS). By default this feature is enabled. The HP WL520 device will scan the area for other

Enable Auto Channel Select (ACS)

Enable Auto Channel Select (ACS)Enable Auto Channel Select (ACS)

HP WL520 devices and select a free or relatively unused communication channel. This helps prevent interference problems and increases the performance of the network. However, if you are setting up a Wireless Distribution System (WDS), it must be disabled.

–

Frequency Channel. Use the pull-down menu to select the desired card frequency. Ensure nearby devices do not use the

Frequency Channel

Frequency ChannelFrequency Channel

same frequency. The Frequency Channels available will depend on the card type and the country of use. Refer to

Radio

Specifications for details.

–

Distance between APs. Set to Large, Medium, Small, Microcell or Minicell depending on the site survey for your system. The

Distance between APs

Distance between APsDistance between APs

distance value is related to the

Large

Medium

LargeLarge

MediumMedium

Multicast Rate (described next). In general, larger systems operate at a slower average rate.

Multicast Rate

Multicast RateMulticast Rate

Small

SmallSmall

Microcell

MicrocellMicrocell

Minicell

MinicellMinicell

This feature is only available for 802.11b wireless cards.

–

Multicast Rate. Set the rate at which Multicast messages may be sent. This value is related to the Distance between APs

Multicast Rate

Multicast RateMulticast Rate

Distance between APs

Distance between APsDistance between APs

parameter (described previously). This feature is only available for 802.11b wireless cards.

distance between aps

distance between aps multi cast r at e

distance between apsdistance between aps

Large 1 and 2 Mbits/sec Medium 1, 2, and 5.5 Mbits/sec Small 1, 2, 5.5 and 11 Mbits/sec Minicell 1, 2, 5.5 and 11 Mbits/sec Microcell 1, 2, 5.5 and 11 Mbits/sec

multicast rate

multicast ratemulticast rate

2-12

Change your Wireless Interface Settings

Enable Interference Robustness

– Enable Interference Robustness. Enable this option if other electrical devices in the 2.4 GHz range may be interfering with

Enable Interference RobustnessEnable Interference Robustness

the wireless signal. This feature is only available for 802.11b wireless cards.

–

Enable Closed System. Check this box to allow only clients configured with your specific Network Names to access the

Enable Closed System

Enable Closed SystemEnable Closed System

HP WL520. When disabled, a client configured with the Network Name “ANY” can connect to the HP WL520. This feature is only available for 802.11b wireless cards.

Enable Load Balancing

– Enable Load Balancing. Enable this option so clients can evaluate which access point to associate with, based on current AP

Enable Load BalancingEnable Load Balancing

loads, to more evenly balance the load between APs. This feature is only available for systems using two 802.11b wireless cards.

Enable Medium Density Distribution

–

Enable Medium Density Distribution. Enable this option to automatically notify client stations of roaming thresholds for the

Enable Medium Density DistributionEnable Medium Density Distribution

nearby APs. This feature is only available for 802.11b wireless cards.

auto channel select (acs)

auto channel select (acs)auto channel select (acs)

Auto Channel Select (ACS) tests available channels and selects one according to its signal strength. The channel range is set by the regulatory agency responsible for your geographic region. Using a probe, the HP WL520 device scans appropriate channels and selects the radio frequency channel with the best signal to noise ratio (i.e., signal strength). ACS is enabled by default; however, if you plan to use WDS setup then you must disable ACS.

disabling acs

disabling acsdisabling acs

1. From the Web interface, select Configuration then click on the Interfaces tab.

2. Deselect the check box to disable Auto Channel Select.

3. Select a frequency channel from the drop-down menu. The clients automatically sense the channel and will configure

themselves to reassociate on the new channel.

Configuration

ConfigurationConfiguration

Interfaces

InterfacesInterfaces

WARNING:

s r il c l

enabling acs

enabling acsenabling acs

1. From the Web interface, select Configuration then click on the Interfaces tab.

2. Select the check box to

WARNING:

On changing the status you mu t eboot y u unit h c e t ro r , w i h w l disconnect all c i n s f om the HP WL520.

Configuration

ConfigurationConfiguration

Enable Auto Channel Select.

Enable Auto Channel Select

Enable Auto Channel SelectEnable Auto Channel Select

s r il l

Interfaces

InterfacesInterfaces

e t rOn changing the status you mu t eboot your unit, which w l disconne t a l cli n s f om the HP WL520.

2-13

Change your Wireless Interface Settings

distance between aps

distance between apsdistance between aps

cells

cellscells

The Distance between APs defines how far apart (physically) your HP WL520 devices are located, which in turn determines the size of your cell. Cells of different sizes have different capacities and therefore suit different applications. For instance, a typical office has many stations requiring high bandwidth and transmit rates for complex, high-speed data processing. In contrast, a typical warehouse has a few forklifts requiring low bandwidth and transmit rates for simple transactions. Cell capacities are compared in the following table, which shows small cells suit most offices, while large cells suit most warehouses:

small cell

small cell la lllarge cell

small cellsmall cell

Physically accommodates few stations Physically accommodates many stations High cell bandwidth per station Lower cell bandwidth per station High transmit rate Lower transmit rate

coverage

coveragecoverage

The number of access point units in a set area determines the network coverage for that area. A great number of access point units covering a small area would be a high-density cell. Few access point units, or even a single unit covering the same small area would result in a low-density cell, even though in both cases the actual area did not change- only the number of access points covering the area changed.

In a typical office, smalls cells may have a ten foot (10’) diameter and an HP WL520 device every twenty feet (20’), which would be considered high density. In contrast, large cells in a typical warehouse may have a ninety foot (90’) diameter and an HP WL520 unit every two hundred feet (200’), considered low density.

rge ce

large celllarge cell

Figure 2-13

Figure 2-13Figure 2-13

set the distance between aps

set the distance between apsset the distance between aps

1. From the Web interface, click on the Configure button, select the Network > Interfaces tab.

2. Select the desired Wireless Slot tab.

3. Use the drop-down menu to set the

Lo y vs. U tra High De y Network

w Densit nsitFigure 2-13 Low Density vs. Ulltra High Density Network

Low Density vs. Ultra High Density NetworkLow Density vs. Ultra High Density Network

Wireless Slot

Wireless SlotWireless Slot

five values for the Distance between APs parameter (configurable for each Wireless NIC): Large, Medium, Small, Minicell, and Microcell.

WARNING:

The Di tance between A s s ould not be appr x v y cP h o imated. It is calculated by means of a manual Site Sur e , in whi h an HP WL520 unit is et up and c ien s a e te ted th o g t t e a ea to d te m i n l ength and co e a e n local limits such as ph s c l inter er

s l t r s r str v

y i a f ence a e in estigated.

r rF om these measu ements the appropriate cell si e and density is determined, and the optimum Di tance between

AP e u ements.

s is calculated to suit your particular business r q ir

Configure

ConfigureConfigure

Multicast rate for the appropriate card.The HP WL520 recognizes the following

Multicast rate

Multicast rateMulticast rate

Network >

Network >Network >

Interfaces

InterfacesInterfaces

u hou h r e r ine s g a r g , a d

r v

z s

2-14

Change your Wireless Interface Settings

multicast rate

multicast ratemulticast rate

The multicast rate measures how quickly information is transmitted across your network. This rate is approximated for a cell, since physical proximity to the AP increases throughput. Stations closer to an AP actually have higher multicast rates than stations in the same cell that are located farther from the AP. In addition, a small cell with several stations located close to the access point can actually transmit information faster than a larger cell with only a few stations located farther from the HP WL520 device.

11 Mbits/s

11 Mbits/s11 Mbits/s

1 Mbit/s

1 Mbit/s1 Mbit/s

Figure 2-14

Figure 2-14Figure 2-14

its/ Mb s Mu ca t Rates

1 Mb s and 11 its/ ltiFigure 2-14 1 Mbits/s and 11 Mbits/s Multicasst Rates

1 Mbits/s and 11 Mbits/s Multicast Rates 1 Mbits/s and 11 Mbits/s Multicast Rates

NOTE:

There is an inter-dependent relationship between the Distance between APs and the Multicast Rate. In general, larger systems operate at a lower average transmit rate.The variation between Multicast Rate and Distance between APs is presented in the following table:

1.0 mbit/s

1.0 mbit

1.0 mbit/s/s

Large yes yes Medium yes yes yes Small yes yes yes yes Minicell yes yes yes yes Microcell yes yes yes yes

set the multicast rate

set the multicast rateset the multicast rate

1. From the Web interface, click on the Configure button, and select the Network > Interfaces tabs.

2. Select the

Wireless - Slot A or Wireless - Slot B tab depending on where your 802.11b card is installed.

Wireless - Slot A or Wireless - Slot B

Wireless - Slot A or Wireless - Slot BWireless - Slot A or Wireless - Slot B

3. Use the drop down menu to select a Multicast rate.

2.0 mbits/s

0 mbit

2.0 mbits/s2. s/s

Configure

ConfigureConfigure

Multicast

MulticastMulticast

5.5 mbits/s

5 mb

5.5 mbits/s5. its/s

1 /s

1 mbits11 mbits/s

11 mbits/s11 mbits/s

Network > Interfaces

Network > InterfacesNetwork > Interfaces

NOTE:

The Distance between APs must be set before the Multicast Rate, because when you select the Distance between APs, the appropriate range of Multicast values automatically populates the drop down menu.

must be set before

must be set beforemust be set before

2-15

ethernet settings

ethernet settingsethernet settings

set ethernet speed and transmission mode

set ethernet speed and transmission modeset ethernet speed and transmission mode

Ethernet Settings

Figure 2-15

Figure 2-15Figure 2-15

Configuration

Configuration. Select the desired speed and transmission mode from the pull down menu. Half-duplex means that only one

ConfigurationConfiguration

side can broadcast at a time, full-duplex allows both sides to transmit, while auto-duplex selects the best transmission mode for the given configuration. The recommended setting is auto-speed-auto-duplex.

Choose between:

Q 10 Mbit/s - half duplex, full duplex, or auto duplex Q 100 Mbit/s - half duplex, full duplex, or auto duplex Q auto speed - half duplex Q auto speed - auto duplex

configure your management interfaces

configure your management interfacesconfigure your management interfaces

Select which interfaces will be available through the Wireless, Ethernet, and Serial Port interfaces of the HP WL520 unit.

rn te a e

Ethe et In rf cFigure 2-15 Ethernet Interface

Ethernet Interface Ethernet Interface

auto-speed-auto-duplex

auto-speed-auto-duplexauto-speed-auto-duplex

Figure 2-16

Figure 2-16 Management Interface Settings

gur

Figure 2-16Fi e 2-16

Management Interface Settings

Management Interface SettingsManagement Interface Settings

2-16

Other Security Configuration Settings

set http interface management services

set http interface management servicesset http interface management services

From the drop-down menu, select which physical interface(s) can be used to manage the HP WL520 device using the HTTP management interface.

Choose between:

— Disabled (all interfaces) — Ethernet only enabled — Wireless A only enabled — Wireless B only enabled — All Interfaces enabled

Enter the HTTP communication port number. Default is 80.

configure serial port interface settings

configure serial port interface settingsconfigure serial port interface settings

The serial port interface on the HP WL520 device is enabled at all times. You can set the following parameters as needed:

Baud Rate

Baud Rate. Select the serial port speed (bits per second). Choose between 2400, 4800, 9600, 19200, 38400, or 57600;

–

Baud RateBaud Rate

9600.

the default Baud Rate is

– Flow Control. Select either None (default) or Xon/Xoff (software controlled) data flow control.

Flow Control

Flow ControlFlow Control

9600

96009600

None

NoneNone

Xon/Xoff

Xon/XoffXon/Xoff

NOTE:

To avoid unexpected performance of your HP WL520, leave the setting Flow Control to its default value (none) unless you are sure what this setting should be.

other security configuration settings

other security configuration settingsother security configuration settings

Control access to the HP WL520 device using MAC Address authentication, WEP encryption, or 802.1x security settings

configure your mac (address) access control table

configure your mac (address) access control table configure your mac (address) access control table

The MAC Authentication tab allows you to build a list of stations, identified by their MAC addresses, authorized to access the HP WL520 device within your network. The list is stored inside each HP WL520 within your network.

Figure 2-17

Figure 2-17 Security Configuration Screen - MAC AuthenticationSecu nfi ion Sc t tion

Figure 2-17Figure 2-17

Enable MAC Access Control

Enable MAC Access Control. Check this box to enable the Control Table.

–

Enable MAC Access ControlEnable MAC Access Control Operation Type

– Operation Type. Choose between Passthru and Block. This determines how the stations identified in the MAC Access

Operation TypeOperation Type

Control Table are filtered.

rity Co gurat reen - MAC Au hentica

Security Configuration Screen - MAC Authentication Security Configuration Screen - MAC Authentication

Passthru

PassthruPassthru

Block

BlockBlock

2-17

Other Security Configuration Settings

add an entry to the mac access control table

add an entry to the mac access control tableadd an entry to the mac access control table

OK.

OKOK

Add

AddAdd

1. Click the Add button in the MAC Access Control table.

2. Enter the MAC Address of the client station authorized to manage this HP WL520 device.

3. Add a comment as needed. Entries are automatically enabled.

disable or delete an entry in the mac access control table

disable or delete an entry in the mac access control tabledisable or delete an entry in the mac access control table

1. Click the Edit button in the MAC Access Control Table.

2. Select the MAC Address you want to disable or delete.

3. Click

NOTE:

For larger networks that include multiple HP WL520 devices, you may prefer to maintain this list on a centralized location using the

radius authentication settings

radius authentication settingsradius authentication settings

Also, if your network includes a RADIUS Server, you can use this tab to define the IP Address of the server that contains a central list of MAC Address values that identify the authorized stations that may access the wireless network. You must specify information for at least the Primary RADIUS server. The Backup RADIUS server is optional.

RADIUS Authentication Settings.

NOTE:

Problems with RADIUS Server configuration or RADIUS Authentication should be referred to the RADIUS Server developer.

Enable RADIUS MAC Access Control Status

Enable RADIUS MAC Access Control Status. Click inside the check box to provide authentication by the RADIUS server.

–

Enable RADIUS MAC Access Control StatusEnable RADIUS MAC Access Control Status

Deselect the check box to prevent use of the RADIUS server.

Authorization Lifetime (seconds). Enter the time, in seconds, each client session may be active before being automatically re-

Authorization Lifetime (seconds)

–

Authorization Lifetime (seconds)Authorization Lifetime (seconds)

authenticated. Range is 900 - 43200 sec; default is 900 sec.

Enable the Primary or Backup RADIUS Server

Enable the Primary or Backup RADIUS Server. Click in the desired check box to enable the RADIUS Server.

–

Enable the Primary or Backup RADIUS ServerEnable the Primary or Backup RADIUS Server

–

IP Address.

IP Address

IP AddressIP Address

– Destination Port.

Destination Port

Destination PortDestination Port

–

Shared Secret. The password for the user on the RADIUS Server must be the same as the Shared Secret.

Shared Secret

Shared SecretShared Secret

–

Response time (seconds).

Response time (seconds)

Response time (seconds)Response time (seconds)

–

Maximum Retransmissions.

Maximum Retransmissions

Maximum RetransmissionsMaximum Retransmissions

Figure 2-18

Figure 2-18 Security Configuration Screen - RADIUS Authentication

gur

Figure 2-18Fi e 2-18

Security Configuration Screen - RADIUS Authentication

Security Configuration Screen - RADIUS Authentication Security Configuration Screen - RADIUS Authentication

2-18

Other Security Configuration Settings

IEEE

802.1x security mode

IEEE 802.1x security mode

IEEEIEEE

802.1x security mode 802.1x security mode

IEEE 802.1x is a proposed standard that provides a means to authenticate and authorize network devices attached to a LAN port. A port in the context of IEEE 802.1x is a point of attachment to the LAN, either a LAN jack for the case of a desktop PC, or a laptop PC association with an Access Point device.

authentication process

authentication processauthentication process

There are three main components in the authentication process. The standard refers to them as:

1. supplicant (client PC)

2. authenticator (Access Point)

3. authentication server (RADIUS server)

When using 802.1x Security Mode or Mixed mode (802.1x and WEP), you need to configure your Radius server for authentication purposes.

Initially the unauthenticated client PC cannot send any data traffic through the HP WL520 device to other systems on the LAN. Data traffic is always encrypted with a WEP key that the client PC receives after it has been authenticated. The HP WL520 device inhibits all data traffic from a particular client PC until the client PC is authenticated. Regardless of its authentication status, a client PC can always exchange 802.1x messages in the clear with the HP WL520 unit.

The HP WL520 device acts as a pass-through device to facilitate communications between the client PC and the RADIUS server. The HP WL520 unit and the client PC exchange 802.1x messages using an EAPOL protocol. Messages sent from the client station are encapsulated by the HP WL520 device and transmitted to the RADIUS server using EAP extensions.

Upon receiving a reply EAP packet from the RADIUS, the message is typically forwarded to the client PC, after translating it back to the EAPOL format. Negotiations take place between the client PC and the RADIUS server. In case of success, the RADIUS server sends a per-session key to the HP WL520 device.

NOTE:

Currently, only the EAP type of EAP-TLS (smart card or certificate) is supported when using 802.1x security mode only. In mixed mode, both the EAP-TLS and EAP-MD5 types are supported provided that the RADIUS server is also configured to support both types.

Operating System MD5 TLS TTLS

Windows 98 Windows 98SE Windows ME Windows 2000 Windows XP

Click on the Encryption tab in the to set the over-the-air encryption properties for each wireless card. In this procedure, “Slot A” refers to PC Card A, and “Slot B” refers to PC Card B.

9 9 8 9 9 8 9 9 8 9 9 9 9 9 9

Security Configuration screen to set the 802.1x security mode for the HP WL520 and/or

2-19

Other Security Configuration Settings

The HP WL520 software offers several methods for configuring security settings:

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Set the 802.1x Security Mode to none and make sure the Encryption status is set to disable for both wireless interface cards.

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WEP encryption is the wireless equivalent of the security level available through a wired network. Select the 802.1x Security Mode to Depending on the card type, the Encryption Key Length will be 40- or 128-bits. This will determine the number of characters allowed for each the Encryption Key. Select the encryption key length from the drop-down menu. You can specify up to four encryption keys between 5 and 12 alphanumeric characters depending on the key length supported by the PC Card in each slot. However, you will only use one key to encrypt data to be transmitted.

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When you decide to use the 802.1x security mode, you must first configure the RADIUS server to receive an authentication response. Your computer operating system must also be configured to receive and send authenticated packets.

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With 802.1x security mode, an Encryption Key entry is not required, since this mode creates keys dynamically. In Mixed mode, Encryption Keys 2-4 are not required.

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The rekey feature determines how often your encryption key is changed (the interval between changes) and can be set to any value between 60 - 65535 seconds. Compared with re-authentication, rekeying frustrates hacking attempts without taxing system resources. Setting a fairly frequent rekey value (900 seconds=15 minutes) effectively protects against intrusion without disrupting network activities.

none

none and enable the Encryption status for one or both wireless PC Cards.

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enable

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setting up the

setting up the hp WL520 using 802.1x security mode

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1. From the Web interface, select Security, then click on the Encryption tab.

2. Set the 802.1x Security Mode to 802.1x and click OK. Ignore the reboot message - this can be done when the entire

procedure is finished.

3. Select the RADIUS Authentication tab.

4. Enter the RADIUS server password in the Shared Secret and Confirm Shared Secret fields.

5. Enable the Primary RADIUS server.

6. Enter the IP Address for the Primary RADIUS server.

7. Enter the Destination Port. The default is 1812, however your RADIUS server provider may have another

communication port defined.

8. Define the Response Time and Response Maximum Retransmission values.

9. Reboot the HP WL520 device for these changes to take affect.

WL520

WL520WL520

using 802.1x security mode

using 802.1x security mode using 802.1x security mode

Figure 2-19

Figure 2-19 Security Configuration Screen - 802.1x Security ModeSec nf n S Sec

Figure 2-19Figure 2-19

urity Co iguratio creen - 802.1x urity Mode

Security Configuration Screen - 802.1x Security Mode Security Configuration Screen - 802.1x Security Mode

2-20

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HP WL520 User Manual

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Frequently Asked Questions

User Manual