3Com 3CB9LF36RL, 3CB9LF36TL, 3CB9LG9MC manual Downgrading Switching Modules to Software Release

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48CHAPTER 4: SOFTWARE INSTALLATION

Downgrading Switching Modules to Software Release 2.1.0

Follow this procedure to downgrade the switching modules in your chassis that are running software Release 3.0 to software Release 2.1.0:

CAUTION: The 36-port 10/100BASE-TX Desktop Switching Modules (Model Numbers 3CB9LF36RL and 3CB9LF36TL) cannot be downgraded to software releases earlier than Release 3.0.0.

1Download the operational code for your previous software Release 2.1.0 to all the switching modules that are installed in your chassis.

2Download the boot code for your previous software Release 2.1.0 to all the switching modules that are installed in your chassis.

3Download the diagnostic code for your previous software Release 2.1.0 to all the switching modules that are installed in your chassis.

Do not reset the modules after you complete the downgrade. You must now downgrade the software code on the switch fabric modules that are installed in your chassis. See the procedure in “Downgrading Switch Fabric Modules to Software Release 2.1.0” in the CoreBuilder 9000 Release Notes for Gigabit Ethernet (GEN) Switch Fabric Modules and GEN Interface Modules.

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Contents CoreBuilder Release Notes 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Release Issues Software Installation Page Overview Management Information Bases MIBs Boot Code SystemRequirements Operational CodeRedundancy 3CB9LG9MCRelease Highlights IgmpCoreBuilder 9000 Enterprise Switch Web-basedManagement Software CDISO Date and Time FormatNew Modules 10/100 Mbps Ethernet Port Monitoring QueryingSnooping 802.1p CoS Loop DetectionCoreBuilder 9000 Implementation Guide for more details Release Highlights LoopDetectMode loopDetectSrcAddress Enable 08-00-8f-75-48-86 LoopDetectStatus Bridge Address Learning LimitsAddresses Learning Mode Secure AddressAddresses are taken from the per-port address allocations See the previous section Bridge Address Learning LimitsSecure Address Learning Mode Vlan Broadcast Multicast,Flood Rate Limiting Vlan as the arriving packetMulticastlimit Limiting is on a per-port basis only Release Highlights Release Issues Corrected ProblemsSystem ManagementWhenever a non-switch fabric module is reset with VLANs StagingWeb-based System Issues Modules have only one backplane port Model Number 3CB9LF36RL or 3CB9LF36TL to act as an IgmpModule TrunkingSystem Issues Release Issues Known Problems Release Issues Known Problems Administration Console of the 36-port 10/100BASE-TX Fast Modify commandNot reset after you enter the module baseline set command If a trunk is configured on a module, the following fieldsKnown Problems Documentation ChangesDocumentation Software Installation Chassis At the EME prompt, enterYour module for guidelines and procedures Order specified in the following procedureVerifying ModulesPower to these module slots Following procedure explains how to download softwareSoftware next in this chapter Modules Show module slot.all verbose From the EME, connect to the module You must complete to ensure that the module is updated Downgrading Switching Modules to Software Release Switch ReferenceIdentifying Modules3CB9LG2MC Applicable DocumentsMIB Files CoreBuilder 9000 Implementation GuideReference Entering Commands UnderstandingAutonegotiation Year Compliance3Com Year 2000 Web Services ServicesTechnical Support Online TechnicalAccess by Analog Modem Username anonymousModem Isdn 24 hours a day, 7 days a week Access by Digital Modem 847 262408 727 Europe Country Telephone Number North America