3COM 10002211 User Manual

™

OREBUILDER

C

¨

OFTWARE INSTALLATION

S

6000

AND

CoreBuilder Extended Switching Software
Revision 8.2.3
October 17, 1997

ELEASE

R

N

OTES

Part No. 10002211
Published October 9,1997
Revision 01

3Com Corporation ■ 5400 Bayfront Plaza ■ Santa Clara, California ■ 95052-8145

Copyright © 3Com Corporation, 1997. All rights reserved. No part of this documentation may be reproduced in any form or by any means or
used to make any derivative work (such as translation, transformation, or adaptation) without permission from 3Com Corporation.

3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the
part of 3Com Corporation to provide notification of such revision or change.

3Com Corporation provides this documentation without warranty of any kind, either implied or expressed, including, but not limited to, the
implied warranties of merchantability and fitness for a particular purpose. 3Com may make improvements or changes in the product(s) and/or
the program(s) described in this documentation at any time.

UNITED STATES GOVERNMENT LEGENDS:

If you are a United States government agency, then this documentation and the software described herein are provided to you subject to the
following restricted rights:

For units of the Department of Defense:

Restricted Rights Legend:

restricted Rights in Technical Data and Computer Software clause at 48 C.F.R. 52.227-7013. 3Com Corporation, 5400 Bayfront Plaza, Santa Clara,
California 95052-8145.

For civilian agencies:

Restricted Rights Legend: Use, reproduction, or disclosure is subject to restrictions set forth in subparagraph (a) through (d) of the Commercial

Computer Software - Restricted Rights Clause at 48 C.F.R. 52.227-19 and the limitations set forth in 3Com’s standard commercial agreement for
the software. Unpublished rights reserved under the copyright laws of the United States.

Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may not be registered in other
countries.

3Com, the 3Com logo, LANplex, and Transcend are registered trademarks of 3Com Corporation. CoreBuilder is a trademark of the 3Com
Corporation. 3ComFacts is a service mark of 3Com Corporation.

AppleTalk is a registered trademark of Apple Computer Corporation. VINES is a registered trademark of Banyan Systems, Inc. DECnet is a
trademark of Digital Equipment Corporation. HP and OpenView are registered trademarks of Hewlett-Packard Corporation. SunNet Manager is a
trademark of Sun Microsystems, Inc. MS-DOS, Windows 95, and Windows NT are registered trademarks of Microsoft Corporation. UNIX is a
registered trademark in the United States and other countries, licensed exclusively through X/Open Company, Ltd.

Other brand and product names may be registered trademarks or trademarks of their respective holders.

Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c) (1) (ii) for

ONTENTS

C

C

OREBUILDER
EVISION

R

Overview 1

Hardware Dependencies 1

Upgrading Your LMM or LMM+ 1
Extended Switching Software Requirement 2
Release Highlights for 8.2.3 2
Release Highlights for 8.2.0 2
Before You Start 3

Updating Your System Software 3

Copying System Software to a Hard Disk 4

Copying to the UNIX Platform 4

Copying to the MS-DOS Platform 5

Loading System Software on the LMM+ 6
User Documentation 8
What’s New at Revision 8.2.3? 9

New Features 9

Software Support for Protocol-based VLANs 9

Support for Seven RMON Data Groups 9

IP Interface Configuration Change 10

Routing on FESM Modules 11

Additional RMON MIB Support 11

RMON Support for FDDI Switched Ports 11

Enabling and Disabling STP Transitions on linkState Changes 12

Displaying Bridge Information 12

What’s New at Revision 8.2.0? 14

New Features 14

Fast Ethernet Switching Module (FESM) Support 14

FESM and FSM HSI Switch Engine 15

Ability to Administer Fast Ethernet Ports 15

Bridge MIB Support for the FESM 18

Filter MIB Support 18

FTP Packet Filter Program Transfers via SNMP 18

8.2.3

6000 E

XTENDED SWITCHING SOFTWARE

Disconnecting an Active telnet or rlogin Session 18
STP linkState Changes 20

CoreBuilder 6000 12-Slot Chassis 21
System Issues 23
Known Problems 26
SNMP MIB Files 28

Supported Versions 28
Compiler Support 29

Revision History 30

IP M

A

ULTICAST ROUTING

Overview A-1
Enabling and Disabling DVMRP A-2
Enabling and Disabling IGMP A-2
Administering IP Multicast Interfaces A-3

DVMRP Metric Value A-3

Time To Live (TTL) Threshold A-3

Rate Limit A-4

Displaying Multicast Interfaces A-4
Disabling Multicast Interfaces A-5
Enabling Multicast Interfaces A-5

Administering Multicast Tunnels A-6

Displaying Multicast Tunnels A-6
Defining a Multicast Tunnel A-7

Removing a Multicast Tunnel A-8
Displaying Routes A-8
Displaying the Multicast Cache A-10

R

B

EMOTE MONITORING

What Is RMON? B-1
Benefits of RMON B-2
CoreBuilder RMON Implementation B-2
RMON Groups B-3

RMON/FDDI Groups B-3

Statistics and axFDDI Groups B-4

History and axFDDI Groups B-5

Alarms B-5

Setting Alarm Thresholds B-6
Example of an Alarm Threshold B-6
RMON Hysteresis Mechanism B-7

(RMON) T

ECHNOLOGY

Host Group B-7
HostTopN Group B-8

Matrix Group B-8
3Com Transcend RMON Agents B-8
Management Information Base (MIB) B-9

MIB Objects B-10

C

VLANS ON

About VLANs C-1

Types of VLANs C-1

Port Group VLANs C-2
MAC Address Group VLANS C-2
Application-Oriented VLANS C-2
Protocol-Sensitive VLANS C-3

CoreBuilder Protocol-Sensitive VLAN Configuration C-3

Protocol Suite C-3
Layer 3 Addressing Information C-4

Default VLAN C-4

Modifying the Default VLAN C-5
How the CoreBuilder System Makes Flooding Decisions C-5
VLAN Exception Flooding C-6
Overlapped IP VLANs C-7
Routing Between VLANs C-8

A

D

DMINISTERING

Displaying VLAN Information D-1
Defining VLAN Information for a Traditional Bridge D-4
Defining VLAN Information for an HSI Switch Engine D-5
Modifying VLAN Information D-7
Removing VLAN Information D-8

THE COREBUILDER SYSTEM

VLAN

S

E

T

ECHNICAL SUPPORT

Online Technical Services E-1

World Wide Web Site E-1
3Com Bulletin Board Service E-1

Access by Analog Modem E-2

Access by Digital Modem E-2
3ComFacts Automated Fax Service E-2
3ComForum on CompuServe Online Service E-3

Support from Your Network Supplier E-3
Support from 3Com E-4
Returning Products for Repair E-5

3COM C

ORPORATION LIMITED WARRANTY

OREBUILDER

C

E

XTENDED SWITCHING SOFTWARE

R

EVISION

8.2.3

6000

Overview

Dependencies

Hardware

These installation instructions and release notes describe revision 8.2.3 of
the CoreBuilder
Corporation, dated October 9, 1997. This revision supersedes revision 8.2.1,
dated May 30, 1997.

LANplex® Extended Switching software revision 8.0.0 or greater, or
CoreBuilder Extended Switching software revision 8.2.1 or greater, requires
that you have installed one of the following versions of the LANswitching
Management Module Plus (LMM+) in system slot 1:

Revision 1.21 or greater (for revision 1 modules)

■

■

Revision 2.12 or greater (for revision 2 modules)

If you attempt to run LANplex system software 8.0.0 or greater, or
CoreBuilder system software 8.2.1 or greater, on an earlier revision of the
LMM+, the system fails to reboot automatically when you turn it on.

To reboot a system that has failed to reboot automatically, connect a
terminal to the serial port on the LMM+ installed in the system. When the
system prompt asks whether you want to “ignore the checksum error,” enter

(for Yes). The system reboots.

y

™

6000 Extended Switching software from 3Com

Upgrading Your LMM or LMM+

To verify that you have an LMM+ module and not an LMM module installed:

1

Check that the module’s ejector tab is labeled “LMM+”.

2

Determine the revision of your LMM+. From the top level of the
Administration Console, enter:

system display

2

C

OREBUILDER

6000 E

XTENDED SWITCHING SOFTWARE REVISION

8.2.3

If you have an LMM+ at a revision earlier than 1.21 (for revision 1 modules)
or 2.12 (for revision 2 modules), call 3Com at 1-800-876-3266 and press
option 2. 3Com will replace your LMM+ with an LMM+ at the correct
revision, free of charge. (Contact 3Com at the same number to upgrade an
LMM to an LMM+. There is a fee for this upgrade.)

Extended Switching

Software

Requirement

Release Highlights

for 8.2.3

Release 8.0.0 or greater of Extended Switching Software requires a
minimum of 2 MB of memory on Ethernet/FDDI Switching Modules
(EFSMs). Memory configuration may vary. If you have an EFSM with 1 MB of
memory, you can order a memory upgrade. Contact your sales
representative.

To determine the amount of memory on the EFSM, look at the lower ejector
tab label or use the

system display

command from the top level of the
Administration Console. EFSMs with only 1 MB of memory have blank
lower ejector tabs. EFSMs with a minimum of 2 MB of memory have “2MB”
on the lower ejector tab labels.

CoreBuilder system software release 8.2.3 offers support for the following
items:

■

Software support for protocol-based VLANs

Support for seven RMON data groups

■

■

IP interface configuration change

■

Routing on FESM Modules

Additional RMON MIB support

■

RMON support for FDDI switched ports

■

Release Highlights

for 8.2.0

For more information about this release, see “What’s New at Revision 8.2.3?”
on page 9.

CoreBuilder system software release 8.2.0 supports the following items:

Fast Ethernet Switching Module (FESM)

■

■

FESM and FSM HSI Switch Engines

■

Ability to administer Fast Ethernet Ports

Bridge MIB support for the FESM

■

Updating Your System Software

■

Filter MIB

FTP packet filter program transfers via SNMP

■

Disconnecting an active telnet or rlogin session

■

■

STP linkState changes

■

CoreBuilder 6000 12-slot Chassis

For more information about this release, see “What’s New at Revision 8.2.0?”
on page 14.

3

Before You Start

Updating Your
System Software

Before you install your new software, read all of these release notes.
Carefully read “System Issues” on page 23 and “Known Problems” on
page 26.

The top-level menus in your Administration Console may vary from those
illustrated in these release notes depending on your level of access privilege
and on the modules you have installed in your CoreBuilder chassis.

You can install a new software version from any host that is running FTP
server software. The system software is distributed for both the UNIX and
the MS-DOS platforms.

The following media types are used to distribute compressed files for
software releases:

■

UNIX tar format 31/2-inch, double-sided, high-density 1.44 MB diskettes

■

MS-DOS format 31/2-inch, double-sided, high-density 1.44 MB diskettes

To install or upgrade your system software, you must:

1

Copy the software from the diskette to your UNIX or MS-DOS computer’s
hard disk.

2

Decompress the software.

3

Load the system software from your computer’s hard disk to flash memory
on the LMM+.

Details for these procedures are provided in the next sections.

4

C

OREBUILDER

6000 E

XTENDED SWITCHING SOFTWARE REVISION

8.2.3

Copying System

Software to a

Hard Disk

You can copy system software to a computer that runs either a UNIX or an
MS-DOS operating system.

Copying to the UNIX Platform

The CoreBuilder software for a UNIX system is distributed on six diskettes.
Diskettes #1, #2, #3, #4, and #5 contain the CoreBuilder software. Diskette #6
contains the SNMP MIBs.

To copy the software to a UNIX hard disk, follow these instructions.

If the directory

/usr/lp6000R

directory before proceeding. If your

does not exist on your computer, create the

/usr

directory is full, use a different
directory and substitute the name of the actual directory for /usr in this
and subsequent procedures.

1 Insert diskette #1 into the disk drive. These instructions assume drive rfd0.

2 Extract the first part of the software file using the following commands:

# cd /usr/lp6000R
# tar xvf /dev/rfd0

3 Remove diskette #1 using the following command:

# eject

4 Insert diskette #2 into the disk drive and extract the second part of the file

using the following command:

# tar xvf /dev/rfd0

5 Remove diskette #2 using the following command:

# eject

6 Insert diskette #3 into the disk drive and extract the third part of the file

using the following command:

# tar xvf /dev/rfd0

7 Remove diskette #3 using the following command:

# eject

Updating Your System Software 5

8 Insert diskette #4 into the disk drive and extract the fourth part of the file

using the following command:

# tar xvf /dev/rfd0

9 Remove diskette #4 using the following command:

# eject

10 Insert diskette #5 into the disk drive and extract the fifth part of the file

using the following command:

# tar xvf /dev/rfd0

11 Remove diskette #5 using the following command:

# eject

The following files are now in your /usr/lp6000R directory:

■ README1

■ lp6000R00

■ lp6000R01

■ lp6000R02

■ lp6000R03

■ lp6000R04

■ restore_lpxR

12 Use the supplied script to decompress and restore the split file

(

lp6000R00, lp6000R01, lp6000R02, lp6000R03, and lp6000R04):

# ./restore_lpxR

This procedure creates the uncompressed file lp6000R. See the README1
file for file size and checksum information.

Copying to the MS-DOS Platform

The CoreBuilder software for an MS-DOS system is distributed on four
diskettes. Install the software using the Windows 95 or Windows NT
operating system.

3Com recommends that you close all Windows programs before running this
Setup program.

6 COREBUILDER 6000 EXTENDED SWITCHING SOFTWARE REVISION 8.2.3

Installing on a Windows 95 or Windows NT Computer. To copy software
to an MS-DOS host computer’s hard disk using Windows 95 or Windows NT,
take these steps:

1 Insert diskette #1 into a disk drive. These instructions assume drive a.

2 For Windows 95, click the Windows 95 START button and choose Run.

OR

For Windows NT, from the File menu, select Run.

The system displays the Setup screen, with the system software name, and
the Setup dialog box.

Loading System Software on the LMM+

3 At the command line in the Setup dialog box, enter

a:setup and click OK.

A Welcome screen appears. The system prompts you to continue or to
cancel the installation. To continue, click Next. To cancel the installation and
exit the Setup program, click Cancel.

The Install Shield Wizard guides you through the rest of the installation
procedure.

This procedure creates a file folder

■ IMAGE folder

■ MIBS folder

■ README.text

c:\3com\lp6000R , which contains:

Before loading the system software on the LMM+, verify that the host
computer, which has a copy of the updated system software, is connected
to the CoreBuilder 6000 system.

You can load the system software into flash memory while the system is
operating. You do not need to bring the system down. After the flash install is
completed, a quick reboot puts the newly loaded software to use.

If you are loading software from a PC host, the FTP server software must be
running on the PC before you begin this procedure.

Perform NV data saves and restores only at the same software revision level.
NV data converts automatically with system software updates 8.0.2 or later.

Loading System Software on the LMM+ 7

Loading 8.2.3 software into flash memory takes approximately 10 to 15
minutes to complete, depending on your network load.

To load the new software:

1 From the top level of the Administration Console, enter:

system softwareUpdate

The system prompts you for the Host IP address, Install filename, User name,
and Password. Press Return or Enter to accept the default values, which are
shown in brackets. The Password field does not display what you enter.

2 Next to

Host IP address, enter the IP address of the host machine (such

as a Sun workstation or PC) from which you are installing the software.

In the example in step 5, the IP address of the host is

192.9.200.96

3 Next to Install file pathname, enter the complete path and filename.

For MS-DOS system syntax, you must precede the full path with a slash ( / ).
For example, if you are loading software from an MS-DOS host, enter the
following command at the

/c:\3com\lp6000R\image\lp6000R

Install file pathname prompt:

4 Next to User name, enter your user name.

5 Next to

Password, enter your password. You must enter a value for this

field, although the field does not display what you enter.

This software installation sample shows the prompts on a UNIX host:

Host IP address [192.9.200.14]: 192.9.200.96
Install file pathname [/usr/lp6000R/lp6000R]:
User name: ronnyk
Password:

Programming flash memory block 1 of 25...
Programming flash memory block 2 of 25...
Programming flash memory block 3 of 25...
.
.
.
Programming flash memory block 25 of 25...

8 COREBUILDER 6000 EXTENDED SWITCHING SOFTWARE REVISION 8.2.3

After the software is loaded, this message appears:

Installation complete.

If the CoreBuilder executable software image stored in flash memory is
corrupted (for example, when the power fails while you are updating
software), contact 3Com Technical Support. See Appendix E.

6 To reboot the system to use the newly loaded software, enter:

system reboot

You are prompted with the following message:

Are you sure you want to reboot the system (n/y) [y]:

7 At the prompt, enter y (for Yes).

You are now ready to configure management access for your system. See
the CoreBuilder 6000 Getting Started Guide.

User Documentation

This version of software is compatible with the documentation listed here.
Some of this documentation may be available on CD-ROM. These release
notes describe any changes and additions to this documentation.

■ CoreBuilder 6000 Getting Started Guide

■ CoreBuilder 6000 Control Panel User Guide

■ CoreBuilder 6000 Operation Guide

■ Corebuilder 6000 Administration Console User Guide

■ CoreBuilder 6000 Command Quick Reference (folded card)

■ LANplex 6000 Extended Switching User Guide

The Extended Switching User Guide is shipped with Extended Switching
software.

Individual modules are shipped with their installation guides:

■ LMM+ (LANswitching Management Module +) Installation Guide

■ FCM (FDDI Concentrator Module) Installation Guide

■ EFSM (Ethernet/FDDI Switching Module) Installation Guide

■ TRSM (Token Ring Switching Module) Installation Guide

■ TMM Fast Ethernet (Tri-Media Module) Installation Guide

What’s New at Revision 8.2.3? 9

■ FDDI Switching Module (FSM) Guide

■ Fast Ethernet Switching Module (FESM) Guide

In addition, Filter Builder software and the Filter Builder Getting Started Guide
are shipped with CoreBuilder 6000 Extended Switching software.

What’s New at Revision 8.2.3?

New Features The following new features have been added at this release.

This section describes the new features, software enhancements, and
corrections implemented at this release.

Software Support for Protocol-based VLANs

Revision 8.2.3 offers support for protocol-based VLANs on the CoreBuilder
6000 system. Protocol-based VLANs allow you to define VLANs based on the
network protocol, including IP, IPX, AppleTalk, XNS, DECnet, X.25 Layer 3,
SNA, Banyan VINES, and NetBIOS.

This release allows you to overlap VLANs by supporting multiple protocols
per port, multiple subnetworks per port, and the spanning of Layer 3
networks across multiple ports. You can also use an external router to
communicate between VLANs.

New menus have been added to the Administration Console menu so that
you can administer protocol-based VLANs on the CoreBuilder 6000 system.
These menus allow you to:

■ Display summary or detailed information on VLANs

■ Define or modify a VLAN definition

■ Delete a VLAN definition

For more details on VLAN functionality in the CoreBuilder 6000 system, see

Appendix C, “VLANs on the CoreBuilder System” and Appendix D,

“Administering VLANs.”

Support for Seven RMON Data Groups

Revision 8.2.3 Extended Switching software supports the following RMON
data groups:

■ Group 1: Statistics — Maintains utilization and error statistics for the

monitored segment

10 COREBUILDER 6000 EXTENDED SWITCHING SOFTWARE REVISION 8.2.3

Top-Level Menu

system
ethernet
fddi
tokenring
bridge

➧ ip

ipx
appletalk
snmp
analyzer
script
logout

➧ interface

route
arp
multicast
udpHelper
routing
icmpRouterDiscovery
rip
ping
statistics

summary
detail

➧ define

modify
remove
addAdvertiseme
removeAdvertise

■ Group 2: History — Stores periodic statistical samples of Group 1 data for

later retrieval.

■ Group 3: Alarm — Allows a network manager to set sampling intervals and

alarm thresholds for any MIB counter or integer

■ Group 4: Host — Maintains counters of traffic to and from hosts attached

to a subnetwork

■ Group 5: HostTopN — Reports on hosts that top a list that was sorted on a

selected parameter in the Group 4 data table

■ Group 6: Matrix — Shows error and utilization data for pairs of physical

addresses

■ Group 9: Event — Allows a network manager to request traps, logs, and

alarms based on alarm events.

For more details on RMON functionality, see Appendix B, “Remote
Monitoring (RMON) Technology.”

IP Interface Configuration Change

The procedure for defining an IP interface has changed in this revision.
When you define an IP interface, you specify several interface characteristics,
as well as the index for the VLAN that is associated with the interface.

You must first define a VLAN, as described in Appendixes C and D, before you
can define an associated IP VLAN interface on an EFSM, ESM, TMM, FESM, or
FSM. You can define an IP interface on an LMM+ without first configuring a
VLAN.

To define an IP interface:

1 From the top level of the Administration Console, enter:

ip interface define

2 Enter the slot number of the switching module or HSI switch engine

whose interface you want to define.

You are prompted for the interface’s parameters.

3 To accept the value in brackets, press Return or Enter at the prompt.

4 Enter the IP address of the interface.

5 Enter the subnet mask of the network to which the interface is to be

connected.

6 Enter the cost value of the interface.

What’s New at Revision 8.2.3? 11

7 Enter the advertisement address to be used on the interface.

8 Enter the number of the VLAN whose interface you are defining.

Example:

Select IP stack by slot {1-3,5,7,9-12} [1]: 5
Enter IP address: 158.101.1.1
Enter subnet mask [255.255.0.0]: 255.255.255.0
Enter cost [1]:
Enter advertisement address(es) [158.101.1.255]:
IP VLANs:

Index Ports
3 1-8
4 9-12

Select VLAN index: 3

Routing on FESM Modules

This release supports IP routing and IP multicast routing on FESM modules.
For more information on IP multicast routing, see Appendix A, “IP Multicast
Routing.”

Each switching module or HSI switch engine operates as a separate IP router.
This strategy means that each non-HSI module (such as the ESM, EFSM, or
TMM-FE module) has its own interfaces, routing table, ARP cache, and
statistics, and each HSI switch engine has its own interfaces, routing table,
ARP cache, and statistics.

Additional RMON MIB Support

The FESM RMON Management Information Base (MIB) contains standard
MIB variables that are defined to collect comprehensive network statistics
and proactively alert a network administrator to significant network events.
If the embedded RMON agent operates full time, it collects data on the
correct port when an event occurs.

RMON Support for FDDI Switched Ports

Revision 8.2.3 Extended Switching software supports the following
RMON/FDDI extensions as specified in the AXON Enterprise-specific MIB:

■ axFDDI — axFDDI group 1

■ axFDDIHistory — axFDDI group 2

12 COREBUILDER 6000 EXTENDED SWITCHING SOFTWARE REVISION 8.2.3

Top-Level Menu

system
ethernet
fddi
tokenring

➧ bridge

ip
snmp
analyzer
script
logout

➧ stpFollowLinkState

display
mode
lowLatency
ipFragmentation
ipxSnapTranslation
trFddiMode
addressThreshold
agingTime
stpState

stpPriority
stpMaxAge

stpHelloTime

stpForwardDelay
stpGroupAddress
srBridgeNumber
port
packetFilter
vlan

Enabling and Disabling STP Transitions on linkState Changes

The menu item stpFollowLinkState has been added. It allows you to enable
or disable Spanning Tree transitions on linkState changes. The default is

enabled.

■ When enabled and the link goes down, stpState transitions to disabled. If the

link comes up, Spanning Tree moves through its normal states.

■ When disabled, the link state has no effect on the stpState. If the link goes

down, the stpState remains in its current state.

If you are a Windows 95 client and directly connected to a CoreBuilder 6000
and running IPX, you must disable stpFollowLinkState. If you are not a
Windows 95 client, do nothing.

To enable or disable Spanning Tree transitions:

1 From the top level of the Administration console, enter:

bridge stpFollowLinkState

2 To enable Spanning Tree transitions, enter:

enabled

To disable Spanning Tree transitions, enter:

disabled

Top-Level Menu

system

display

ethernet

mode

fddi

lowLatency

tokenring

ipFragmentation

➧ bridge

ipxSnapTranslation

ip

trFddiMode

snmp

addressThreshold

analyzer

agingTime

script

stpState

logout

stpPriority
stpMaxAge

stpHelloTime

stpForwardDelay
stpGroupAddress
srBridgeNumber

➧ port

packetFilter
vlan

➧ summary
➧ detail

multicastLimit
stpState
stpCost
stpPriority
srRingNumber
srHopLimit
address

Displaying Bridge Information

You can display the current setting for stpFollowLinkState. The display
includes bridge statistics (such as topology change information) and
configurations for the bridge.

To display the bridge information:

1 From the top level of the Administration console, enter:

bridge port summary

OR

bridge port detail

The system prompts you for slot number(s).

What’s New at Revision 8.2.3? 13

Sample display of bridge port information:

stpState timeSinceLastTopologyChange
disabled 0 hrs 0 mins 0 secs

stpFollowLinkState topologyChangeCount

enabled 0

topologyChangeFlag BridgeIdentifier

false 8000 00803elbf216

designatedRoot stpGroupAddress bridgeMaxAge

0000 000000000000 01-80-c2-00-00-00 20

maxAge bridgeHelloTime helloTime

20 2 2

bridgeFwdDelay forwardDelay holdTime

15 15 1

rootCost rootPort priority

0 No port 0x8000

agingTime mode addrTableSize

300 transparent 32678

addressCount peakAddrCount addrThreshold

40 40 32000

ipFragmentation ipxTranslation lowLatency

enabled disabled disabled

trFDDiMode SRBridgeNumber bufferLimit

n/a n/a n/a

14 COREBUILDER 6000 EXTENDED SWITCHING SOFTWARE REVISION 8.2.3

What’s New at Revision 8.2.0?

New Features The following features have been added at this release.

This section describes the new features, software enhancements, and
corrections that are implemented at this release.

Fast Ethernet Switching Module (FESM) Support

The Fast Ethernet Switching Module (FESM) provides high-function
switching of traffic among Fast Ethernet workstations and subnetworks over
the multigigabit high-speed interconnect (HSI) bus of the CoreBuilder
system.

The FESM module has two configurations:

■ Eight 100BASE-TX ports that use RJ-45 connectors

These ports support connections to unshielded twisted pair (UTP) Category
5 media.

■ Six 100BASE-FX ports that use SC connectors

These ports support connections to multimode fiber media.

The FESM automatically learns the MAC-layer addresses of workstations
on attached subnetworks and forwards packets to their appropriate
destinations.

When used with CoreBuilder

Extended Switching software,
the FESM also supports routing between attached subnetworks. In
addition, the FESM fully complies with the IEEE 802.1d bridging
standard.

6000

The FESM requires CoreBuilder 6000 software revision 8.2.0 or greater. This
software, in turn, requires that you install one of the following LANswitching
Management Module Plus (LMM+) versions in system slot 1:

■ Revision 1.21 or greater of the revision 1 LMM+

■ Revision 2.12 or greater of the revision 2 LMM+

CAUTION: If you attempt to run CoreBuilder system software 8.2.0 or greater
on an earlier revision of the LMM+, the system fails to reboot when you turn
it on.

What’s New at Revision 8.2.0? 15

To verify that you have an LMM+ module and not an LMM module installed:

1 Verify that the module’s ejector tab is labeled “LMM+”.

2 Determine the revision level of your LMM+. From the top level of the

Administration Console, enter:

system display

To upgrade your LMM or LMM+, see “Upgrading Your LMM or LMM+” on
page 1.

FESM and FSM HSI Switch Engine

You can combine the Fast Ethernet Switching Module (FESM) and the FDDI
Switching Module (FSM) into a multiboard high-speed interconnect (HSI)
switch engine.

An HSI switch engine is a combined set of FSMs, FESMs, or both, which,
when inserted into the HSI bus according to specific configuration rules,
operates as a single switch. Multiple FSMs and FESMs in a single HSI switch
engine form a bridge out of the combined set of external ports on all
modules in that switch engine. As a new module is added to an existing HSI
switch engine, configuration information for the existing HSI switch engine
is added to the new module. You must manually configure any port-specific
information.

Ability to Administer Fast Ethernet Ports

New menus on the Administer menu allow you to administer Fast Ethernet
ports on the Fast Ethernet Switching Module (FESM) and the Tri-Media Fast
Ethernet Module (TMM-FE). You can now configure Fast Ethernet ports to
support:

■ Full-duplex operation

■ Intelligent flow management (IFM)

Full-duplex operation. By default, FESM and TMM Fast Ethernet ports
operate in half-duplex mode. In this mode, data flows through the port in
only one direction at a time.

full-duplex, the port transmits and receives data at the same time
through two separate channels.

When you change this operating mode to

16 COREBUILDER 6000 EXTENDED SWITCHING SOFTWARE REVISION 8.2.3

Full-duplex mode eliminates both the link’s collision domain and the
need for collision detection. As a result, full-duplex point-to-point links
can be much longer than half-duplex links.

To configure a port for full-duplex operation:

The items available on the top-level menus in this section vary depending on
your level of access and on the modules installed in your CoreBuilder 6000
chassis.

Top-Level Menu

system

➧ ethernet

fddi
tokenring
bridge
ip
ipx
appletalk
snmp
analyzer
script
logout

summary
detail

➧ fastEthernet

label
portState

s

➧ duplexMode

ifm

1 From the top level of the Administration Console, enter:

ethernet fastEthernet duplexMode

A prompt similar to the following one appears:

Select slot(s) (10-12|all):

This prompt indicates that the CoreBuilder 6000 system contains
configurable Fast Ethernet ports in slots 10, 11, and 12.

2 Enter the number(s) of the slot(s) that contain ports that you want to

set to full-duplex mode:

10-12

For each slot you enter, the system prompts you for specific port
numbers:

Select Ethernet port(s) (1-8,all):

3 Enter the number(s) of the port(s) that you want to configure:

1,2,5-7

The system displays this message:

Warning: Changing mode to full duplex disables collision
detection. The device connected to this port must be
configured for the same duplex mode.
Do you want to change the duplex mode (n,y) [y]:

The CoreBuilder 6000 system does not support autonegotiation of duplex
mode between devices. You must configure any device attached to this port
to the same duplex mode as the port.

4 Enter y for Yes, n for No.

You receive the prompt to select each port’s duplex mode:

Enter new value (full, half) [half]:

What’s New at Revision 8.2.0? 17

5 Enter full to set the port to full-duplex mode or half to set the port

to half-duplex mode.

Default The port’s current setting is indicated in brackets. To select this default,

press Return. This action leaves the port duplex mode unchanged.

6 Repeat steps 4 and 5 to configure all the selected ports in all the

selected slots.

Changing the mode to full-duplex disables collision detection on these ports.

Top-Level Menu

system

➧ ethernet

fddi
tokenring
bridge
ip
ipx
appletalk
snmp
analyzer
script
logout

summary
detail

➧ fastEthernet

label
portState

s

duplexMode

➧ ifm

Intelligent Flow Management (IFM).

Intelligent flow management
(IFM) is a congestion control mechanism that is built into the
CoreBuilder system. You should implement IFM on any Fast Ethernet
port that has a high volume of traffic. By default, IFM is enabled on
CoreBuilder module ports.

Congestion is caused when one or more devices send traffic to an already
congested port. If the port is connected to another CoreBuilder system or to
an end station, IFM minimizes packet loss and inhibits the sending device
from generating more packets until the congestion ends.

Intelligent flow management is supported only on half-duplex ports. It is
disabled on port that are configured for full-duplex mode. 3Com
recommends that you disable IFM on network segments that are connected
to repeaters.

To apply IFM to a half-duplex Fast Ethernet port:

1 From the top level of the Administration Console, enter:

ethernet fastEthernet ifm

A prompt similar to the following one appears:

Select slot(s) (10-12|all):

This prompt indicates that the CoreBuilder 6000 system contains
configurable Fast Ethernet ports in slots 10, 11, and 12.

2 Enter the number(s) of the slot(s) that contain ports that you want to

set to IFM mode:

10-12

Default To select the default all, press Return.

18 COREBUILDER 6000 EXTENDED SWITCHING SOFTWARE REVISION 8.2.3

For each slot that you enter, the system asks for specific port numbers:

Select Ethernet port(s) (1-8,all):

3 Enter the number(s) of the port(s) that you want to configure:

1,2,5-7

Default To select the default all, press Return.

enable or disable to select the IFM mode for each selected port:

Enter

Enter new value (disabled, enabled) [disabled]:

4 Enter enabled to set the port to IFM mode or disabled to deactivate IFM

for the port.

Default To select the port’s current setting, shown in brackets, press Return. This

action leaves the port setting unchanged.

5 Repeat step 4 to configure all selected ports in all selected slots.

Bridge MIB Support for the FESM

FESM support has been added to the Bridge MIB.

Filter MIB Support

To support Filter Builder software, this revision adds the Filter MIB (address
group, port group, and bridge packet filter program). See the Filter Builder
Getting Started Guide, which is shipped with the Filter Builder software, for

more information about the Filter Builder product.

FTP Packet Filter Program Transfers via SNMP

You can now use File Transfer Protocol (FTP) to transfer a user-defined
packet filter program from a remote server to a CoreBuilder switching
module through the SNMP lpsFtTable MIB.

Disconnecting an Active telnet or rlogin Session

Modifications to the telnet and rlogin features of the CoreBuilder 6000
system now allow you to preempt users by forcing a disconnection. This
administrative feature requires that you use the system Administer
password at the Administration Console.

The rlogin usage is identical to the telnet usage. Simply substitute rlogin
wherever you see telnet.

What’s New at Revision 8.2.0? 19

telnet Implementation. When you attempt to use the telnet command to
enter a system that is being used by another telnet connection, the system
displays:

Sorry, this system is engaged by another telnet session.
Host IP address: xxx.xxx.xxx.xxx

Logout the other telnet session? (Y/N)
Enter Password: correctpassword

y

The first telnet session is disconnected and the system displays:

LOGGING OUT the other telnet session.

You can then connect in the usual manner.

CAUTION: When you preempt a telnet or rlogin session in this manner, the
current session user receives no notice that the session will be disconnected.

If you enter an incorrect password, the system displays:

Incorrect password. Disconnecting.

The system disconnects after it receives three incorrect attempts at the
Administer-level password.

If you respond n

to the request to disconnect, your session disconnects

and the original connection remains established. The system displays:

Disconnecting

If you respond y at the Logout the other telnet session? prompt and
it is not accepted, it is probably because of the telnet configuration on the
UNIX host. To force the system to accept your response to the prompt,
follow these steps:

1 Escape to the telnet session by pressing

Ctrl+}

2 Set the cr/lf option by entering either of these commands:

set crlf

OR

toggle crlf

Press Return or Enter to redisplay the prompt. Your response should now be
accepted.

20 COREBUILDER 6000 EXTENDED SWITCHING SOFTWARE REVISION 8.2.3

STP linkState Changes

The linkState of a port is now a factor in determining the Spanning Tree port
state. This change helps prevent bridge loops when making network
connections to previously inactive ports.

The bridge port summary and the bridge port detail screens include a new

Top-Level Menu

system

display

ethernet

mode

fddi

lowLatency

tokenring

ipFragmentation

➧ bridge

ipxSnapTranslation

ip

trFddiMode

snmp

addressThreshold

analyzer

agingTime

script

stpState

logout

stpPriority
stpMaxAge

stpHelloTime

stpForwardDelay
stpGroupAddress
srBridgeNumber

➧ port

packetFilter
vlan

➧ summary
➧ detail

multicastLimit
stpState
stpCost
stpPriority
srRingNumber
srHopLimit
address

linkState column.

To display the bridge information:

1 From the top level of the Administration Console, enter:

bridge port summary

OR

bridge port detail

The system prompts you for slot number(s).

2 Enter the number(s) of the slot(s) or

bridges in the system.

The system prompts you for the port type.

all to view port parameters for all

3 Enter

Ethernet

The system prompts you for port number(s).

4 Enter the number(s) of the port(s) or

all to view port parameters for all

ports on the bridge.

Sample screen showing the display after the changes:

port rxFrames rxDiscards txFrames

FDDI 1 0 0 0

Fast Ethernet 1 0 0 0

Ethernet 2 59243130 0 866810375

... ... ... ...

port portId fwdTransitions

FDDI 1 0x8001 0

Fast Ethernet 1 0x8002 0

Ethernet 2 0x8003 0

... ... ...

port stp linkState state

FDDI 1 enabled n/a forwarding

Fast Ethernet 1 enabled down disabled

Ethernet 2 enabled up forwarding