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please contact 3Com and a copy will be provided to you.
UNITED STATES GOVERNMENT LEGEND
If you are a United States government agency, then this documentation and the software described herein are
provided to you subject to the following:
All technical data and computer software are commercial in nature and developed solely at private expense.
Software is delivered as “Commercial Computer Software” as defined in DFARS 252.227-7014 (June 1995) or
as a “commercial item” as defined in FAR 2.101(a) and as such is provided with only such rights as are
provided in 3Com’s standard commercial license for the Software. Technical data is provided with limited rights
only as provided in DFAR 252.227-7015 (Nov 1995) or FAR 52.227-14 (June 1987), whichever is applicable.
You agree not to remove or deface any portion of any legend provided on any licensed program or
documentation contained in, or delivered to you in conjunction with, these Release Notes.
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, CoreBuilder, LANsentry, PACE, SuperStack, and Transcend are registered trademarks of
3Com Corporation. 3Com Facts is a service mark of 3Com Corporation.
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countries. Java is a registered trademark of Sun Microsystems, Inc. UNIX is a registered trademark in the United
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All other company and product names may be trademarks of the respective companies with which they are
associated.
ONTENTS
C
O
1
2
VERVIEW
Important Notices7
Supported Modules8
System Requirements9
Downgrading Switching Modules to Software Release 2.1.048
R
5
6
EFERENCE
Identifying Modules in the Switch49
Applicable Documents51
MIB Files51
3Com Enterprise MIBs52
Entering Commands53
Understanding Autonegotiation53
Year 2000 Compliance54
T
ECHNICAL SUPPORT
Online Technical Services55
World Wide Web Site55
3Com Knowledgebase Web Services55
3Com FTP Site56
3Com Bulletin Board Service56
Access by Analog Modem56
Access by Digital Modem57
3Com Facts Automated Fax Service57
Support from Your Network Supplier57
Support from 3Com57
Returning Products for Repair59
1
VERVIEW
O
Important Notices
These release notes summarize operational requirements and issues for
CoreBuilder
Read these important notices before you begin.
For the most up-to-date release notes for the CoreBuilder 9000
management modules, switch fabric modules, Layer 3 interface modules,
and other Layer 2 interface modules, visit the 3Com Web site:
http://support.3com.com/nav/switches.htm
CAUTION:
Enterprise Management Engine (EME) have 20 MB of CPU RAM. To
determine the CPU RAM size, enter
line interface. The
indicates the amount of CPU RAM:
If your EME has 8 MB of CPU RAM, you must replace the 4 MB DRAM
card in your EME with a 16 MB DRAM card. Contact your network
supplier or 3Com representative for information about how to obtain a
16 MB DRAM memory card.
CAUTION:
file, you must upgrade all the modules in the CoreBuilder 9000 chassis,
including the EME module, to major software Release 3.0. You cannot
run Release 3.0 software on some modules and not on other modules.
See Table 1 in this chapter for more information about the software
version that each CoreBuilder 9000 component requires.
Except for the Enterprise Management Controller (EMC) boot
9000 software Release 3.0 requires that the
show eme
CPU Ram Size(MB)
8
or
from the EME command
field on the left side of the screen
.
20
The EMC boot file remains at software Release 2.1.0.
8
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1: O
VERVIEW
See “Installation and Upgrade Prerequisites”, in Chapter 4 “Software
Installation”, for information about how to determine the software
release on each module in the chassis.
Supported Modules
CAUTION:
Before you attempt to download any module software, save
the configuration file for the release that you are currently running to an
external device using the EME
upload
CoreBuilder 9000 Enterprise Management Engine User Guide
explanation of how to use the EME
command. See the
upload
command.
for an
Software Release 3.0 applies to the following 3Com CoreBuilder 9000
Layer 2 switching modules:
■
20-port 10/100BASE-TX Fast Ethernet Layer 2 Switching Module
(Model Number 3CB9LF20R)
■
36-port 10/100BASE-TX Fast Ethernet RJ-45 Layer 2 Switching Module
(Model Number 3CB9LF36R)
■
36-port 10/100BASE-TX Fast Ethernet Telco Layer 2 Switching Module
(Model Number 3CB9LF36T)
■
36-port 10/100BASE-TX Desktop Switching Module (RJ-45
Connectors) (Model Number 3CB9LF36RL)
These Fast Ethernet and Gigabit Ethernet Layer 2 switching modules are
intelligent LAN interface modules with embedded management agents
that support standard Simple Network Management Protocol (SNMP)
Management Information Bases (MIBs).
System Requirements
9
System
Requirements
Each CoreBuilder 9000 Enterprise Switch has these minimum system
requirements:
■
One switch fabric module installed in the CoreBuilder 9000 chassis
with appropriate software:
■
For all CoreBuilder 9000 chassis: One 24-port Gigabit Ethernet
Switch Fabric Module (Model Number 3CB9FG24 or Model
Number 3CB9FG24T)
■
For the 7-slot chassis and 8-slot chassis: One 9-port Gigabit
Ethernet Switch Fabric Module (Model Number 3CB9FG9)
■
One Enterprise Management Engine (Model Number 3CB9EME)
installed in the CoreBuilder 9000 chassis with appropriate software
Boot Code and
Operational Code
Table 1 lists the minimum compatible software releases for the switch
fabric modules and management modules that are required for operation
with any Fast Ethernet or Gigabit Ethernet Layer 2 switching module that
has software Release 3.0 installed.
CAUTION:
Except for the EMC boot file, you must update all module
software to Release 3.0.
Ta b le 1
Module NameModel Number
20-port 10/100BASE-TX Fast Ethernet
Layer 2 Switching Module
36-port 10/100BASE-TX Fast Ethernet
RJ-45 Layer 2 Switching Module
36-port 10/100BASE-TX Fast Ethernet
Telco Layer 2 Switching Module
Software Compatibility Requirements for Layer 2 Switching Modules (continued)
Minimum Software
Requirements
3CB9LG9MC3.0.0lg9mc30000.all
3CB9FG243.0.0fga2430000.all
3CB9FG24T3.0.1fga24t30001.all
3CB9FG93.0.1fg930001.all
Management operational code
3.0.0
Controller boot code 2.1.0
Controller operational code 3.0.0
3CB9EMCController boot code 2.1.0
Controller operational code 3.0.0
Optional Switch
Fabric Module
In the CoreBuilder 9000 8-slot chassis and 16-slot chassis, you can install
a second Gigabit Ethernet Switch Fabric Module for redundancy.
Redundancy
CAUTION:
If you install a second Gigabit Ethernet Switch Fabric Module
for redundancy, it must be the identical type of module as the one that is
currently installed. For more information about switch fabric module
redundancy, see the
9-Port Gigabit Ethernet Switch Fabric Module Quick
Start Guide for the CoreBuilder 9000 Enterprise Switch
Gigabit Ethernet Switch Fabric Module Quick Start Guide for the
CoreBuilder 9000 Enterprise Switch
.
Filename
eme30000.bt
eme30000.op
emcv20100.bt
emc30000.op
emcv20100.bt
emc30000.op
, and the
24-Port
Optional
Management
Redundancy
The required Enterprise Management Engine (EME) provides both
management and controller functions in the chassis. To have redundant
management and controller functions in any chassis type (7-slot chassis,
8-slot chassis, and 16-slot chassis), install a second EME. To have only
redundant controller functions in any chassis type, install an Enterprise
Management Controller (EMC).
2
ELEASE
R
Software Release 3.0 includes the following changes:
■
Web-based Management
■
ISO Date and Time Format
■
New Modules
■
IGMP
■
10/100 Mbps Ethernet Port Monitoring
■
RMON Monitoring Applications
■
802.1p CoS
■
Loop Detection
■
Bridge Address Learning Limits
■
Secure Address Learning Mode
IGHLIGHTS
H
■
Configuring One Untagged System VLAN
■
Broadcast, Multicast, and Flood Rate Limiting
12
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ELEASE HIGHLIGHTS
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Web-based
Management
Software Release 3.0 supports the Web Management suite of features,
which consists of embedded Web Management applications and
installable tools:
■
Embedded Web Management applications
— Use the embedded
Web Management applications, which are part of the system software
image, for most of your device configuration and management tasks.
You can manage a single port or device, or, using multiple windows,
you can manage multiple devices. This software contains:
■
WebConsole
■
DeviceView
— An HTML-based set of configuration forms.
— A Java-based application that displays a real-time
image of the device. You can manage each port or module, or the
entire system, by clicking the part of the image that you want to
manage.
■
— Access to the configuration form on which you set up the
Help
installable Help, as well as access to links to support information on
the 3Com Web site.
■
Installable tools
Software CD
the
■
DeviceView accessories
— The following optional tools are available from
:
— To set up e-mail notification for
Status Logging.
■
WebManage Framework
— To group your access links to the
devices that you manage.
■
Filter Builder
— To create filters for packets on your Layer 3
switching modules only.
■
Form-specific Help
— To access hypertext information about the
fields in the WebConsole and DeviceView applications.
For information about how to install and use the Web Management
applications, see the
CoreBuilder 9000 Enterprise Switch
Web Management User Guide for the
.
ISO Date and Time Format
13
ISO Date and Time
Format
New Modules
The format for date and time has changed for Release 3.0 to the
following syntax and now complies with ISO 8601:
YYYY-MM-DDThh:mm:ss
Ta b le 2
FormatDescription
YYYYYear (1999 – 2098)
MMMonth (01 – 12)
DDDay (01 – 31)
TTime designator (the literal character “T”)
hhHour (00 – 24)
mm Minute (00 – 59)
ss Second (00 – 59)
Example:
Date and Time
2000-02-05T03:25:34
Software Release 3.0 supports the following new modules:
■
The 20-port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching
Module (Model Number 3CB9LF20MM). The module has twenty 100
Mbps Ethernet fiber-optic ports with MT-RJ connectors on its front
panel and two 1-Gigabit port for connection to the chassis backplane.
It occupies a single interface module slot in the CoreBuilder 9000
7-slot, 8-slot, and 16-slot chassis.
■
The 36-port 10/100BASE-TX Desktop Switching Module (RJ-45
Connectors) (Model Number 3CB9LF36RL). The module has thirty-six
10/100 Mbps Ethernet ports with RJ-45 connectors on the front panel
and one 1-Gigabit port for connection to the chassis backplane. It
occupies a single interface module slot in the CoreBuilder 9000 7-slot,
8-slot, and 16-slot chassis.
■
The 36-port 10/100BASE-TX Desktop Switching Module (RJ-21 Telco
Connectors) (Model Number 3CB9LF36TL). The module has three
RJ-21 connectors on the front panel. Each RJ-21 connector contains
12 switched 10/100 Mbps Ethernet ports, for a total of 36 switched
ports. The module has one 1-Gigabit port for connection to the
chassis backplane. It occupies a single interface module slot in the
CoreBuilder 9000 7-slot, 8-slot, and 16-slot chassis.
14
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IGMP
10/100 Mbps
Ethernet Port
Monitoring
The Internet Group Management Protocol (IGMP) ensures that multicast
traffic is forwarded from the local router to multicast group members on
directly attached subnetworks. The Snooping function monitors IGMP
packets to ensure that multicast traffic is
only
forwarded to areas of the
network that contain multicast group members. Unlike the Distance
Vector Multicast Routing Protocol (DVMRP), IGMP functions do not relate
to multicast packet delivery between routers. IGMP functions include:
■
Querying
■
Snooping
This feature, which is enabled by default, is designed to:
■
Monitor 10/100 Mbps Ethernet ports for excessive collisions, multiple
collisions, late collisions, runts, and FCS errors.
■
Compare these error counters against predetermined thresholds.
■
Disable a port that reaches an error threshold.
■
Report the reason that a port is disabled to the Administration
Console, MIB databases, and SNMP traps.
■
Reenable the port after an initial backoff time interval.
■
Continue monitoring.
See “Port Monitoring” in Chapter 5 “Ethernet” in the
Implementation Guide
for information about the new Ethernet port
monitoring feature.
CoreBuilder 9000
RMON Monitoring Applications
15
RMON Monitoring
Applications
802.1p CoS
New versions of LANsentry® Manager are being released. You can use
LANsentry Manager to monitor traffic and error rates for hosts on a
network, along with traffic flows between these hosts. When you set up
LANsentry Manager with the CoreBuilder 9000, take these factors into
consideration:
■
To access a CoreBuilder 9000 module, use the community string plus
extension format as follows:
<community string>@slot_<slot>.<subslot>
For switch fabric modules use this format:
<community string>@fabric
For example, to access a module in slot 4 using the read/write
community string of “private”, enter
■
If you have any problems connecting to the CoreBuilder 9000 using
private@slot_4.1
LANsentry Manager, increase the SNMP timeout values.
See “Remote Monitoring (RMON)” in Chapter 21”Device Monitoring” of
CoreBuilder 9000 Implementation Guide
the
for more details.
802.1p Class of Service (CoS) focuses on traffic class and dynamic
multicast filtering services in bridged LANs. It addresses separate queuing
of time-critical frames to reduce the jitter caused by multicast flooding.
802.1p uses the same tag format as 802.1Q, but uses three additional
bits of the tag control information for setting a user priority level.
Loop Detection
The 36-port 10/100BASE-TX Desktop Switching Modules (Model
Numbers 3CB9LF36RL and 3CB9LF36TL) recognize Spanning Tree packets
but these modules do not participate in Spanning Tree. Instead, the
modules can implement a separate loop-detection algorithm on all of
their front-panel ports.
This algorithm acts only on the 36-port 10/100BASE-TX Desktop
Switching Module front-panel ports, and does not act on other Layer 2
modules in the CoreBuilder 9000 system.
16
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You configure the front-panel ports to participate in this algorithm using
three options in the
disable
■
— This default setting disables the module’s port-based
bridge loopdetectmode
menu:
algorithm.
enable
■
— When you configure the module using the
loopdetectmode enable
option, the module searches for traffic
bridge
loops by comparing Spanning Tree Bridge Protocol Data Unit (BPDU)
packets that enter its backplane port with BPDU packets that enter its
front-panel ports. If the module detects the same BPDU packet
coming through both its backplane port and any front-panel port, the
module:
■
Disables the front-panel port where the BPDU packet entered.
■
Sends a trap to the EME.
■
Displays
bridge port summary
loop detect
for the port status in the
bridge port detail
and
displays.
immediate
■
— When you configure the module using the
loopdetectmode immediate
option, the module searches for
bridge
any Spanning Tree BPDU packets that are received on its front-panel
ports. If the module detects that a BPDU packet is received on any
front-panel port, the module:
■
Disables the front-panel port where the BPDU packet entered.
■
Sends a trap to the EME.
■
Displays
bridge port summary
bpdu detect
for the port status in the
bridge port detail
and
displays.
Loop Detection
17
When the module disables a front-panel port to eliminate a loop, you
must bring the port back online manually.
Example:
CB9000@slot 5.1 [36L-E/FEN-TX-L2] (): bridge
Menu options (CoreBuilder 9000-10AD6C):
---------------------------------------display - Display bridge information
agingTime - Set the bridge address aging time
cos - Administer COS priority queues
port - Administer bridge ports
multicast - Administer multicast filtering
vlan - Administer VLANs
loopDetectMode - Set Loop Detect mode
learnMode - Set the bridge learning mode
CB9000@slot 1.1 [36L-E/FEN-TX-L2] (bridge): loopdetectmode
Enter new value (disable,enable,immediate) [disable]: enable