Installation guide

Release Notes for Catalyst5000 Family Software Release4.x

OL-2306-01

Open and Resolved Caveats in Software Release 4.3(1)

• After a topology change occurs in a Token Ring environment, when STP reconverges, source-routed

frames originating from a Catalyst 5000 family Token Ring module (WS-X5030 or WS-X5031) are

not forwarded across an ISL trunk link to another switch. Non-source-routed frames are forwarded

correctly.

Workaround: Enter the clear cam dynamic command on the affected switches. (CSCdk63561)

• In a Token Ring network, if a TrBRF VLAN is running IEEE STP, the Catalyst 5000 family switch

does not flood IBM STP BPDUs from other sources, potentially preventing SRB devices running

IBM STP from properly creating a loop-free spanning tree topology.

Workaround: Change the TrBRF STP mode to IBM and force forwarding between the TrCRFs and

TrBRFs when in SRT mode. (CSCdk54704)

• In the output of the show module command, the NFFC II (WS-F5531=) is incorrectly identified as

the NFFC+. (CSCdk70972)

• In some cases, when you connect a port on the 24-port 10/100BASE-TX Fast Ethernet module

(WS-X5225R) to an end station, the port might loop data back to itself. If spanning tree is disabled

on the port, this problem can negatively affect switch performance. If spanning tree is enabled, the

port is automatically disabled. You can verify that the problem is occurring, and identify the

problem port, by entering the show cdp neighbors command and checking to see if the switch itself

is listed as a neighbor.

Workaround: Disable and reenable the problem port. (CSCdm26889)

• In some cases, a Catalyst 5000 family switch with redundant supervisor engines might reset as a

result of the change from Daylight Saving Time to Standard Time. This problem only occurs if the

Daylight Saving Time adjustment is enabled (using the set summertime enable command) and the

switch has not been reset or power-cycled since the change to Standard Time. (CSCdk57762)

Resolved Caveats in Software Release4.3(1)

Note For a description of open caveats in software release 4.3(1), see the “Open Caveats in Software

Release4.3(1)” section on page57.

This section describes caveats resolved in software release 4.3(1):

• In some cases, in a Catalyst 5000 family chassis with both a Supervisor Engine III module and a

Token Ring module (WS-X5030 and WS-X5031), the supervisor engine might generate an MCP

exception error periodically that resets the switch. The problem occurs more frequently if the switch

is processing many SNMP queries. This problem is resolved in software release4.3(1).

(CSCdk34066)

• If a device (such as certain network analyzers) locally attached to a Token Ring module incorrectly

transmits traffic using the same source MAC address as another device in a remote location in the

network, subsequent traffic sent from the Token Ring port to the remote device is dropped. The

CAM table shows the remote address in the correct location but the Token Ring module treats the

address as local on the switch port. This problem is resolved in software release4.3(1).

(CSCdk45832)