November 1, 1998
This rare problem (described in Cisco bug ID CSCdk32229) is found only on Catalyst 5xxx switches equipped with Supervisor IIIs (WS-X5530-E1 and WS-X5530-E2). The Supervisor III may reset a line card after 49 days, 17 hours, and 3 minutes of uptime, or can reset the supervisor module itself. The type of reset causes a card to come back on line in a "faulty" state. A manual line card reset is needed to resume normal operation.
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This problem was recognized because of the increased processor speed of the Supervisor III.
When the system uptime of a Catalyst 5xxx switch reaches 49 days, 17 hours, and 3 minutes, a burst of control messages may be erroneously sent from the Network Management Processor (NMP) to the Master Control Processor (MCP) located on the Supervisory Module.
In chassis equipped with a Supervisory Module III, this may lead to unexpected resets of line cards, including ATM cards. Line cards may also change to a "faulty" state during normal operations. Another symptom that may be experienced is an "MCP exception" error, leading to a reset of the Supervisory Module III.
This problem is fixed in Catalyst software releases 3.2(3) and 4.2(1). These versions of software can be downloaded from Cisco's web site at:
A workaround for customers prior to software releases 3.2(3) and 4.2(1) is to manually reset the switch once before the System Uptime reaches 49 days, 17 hours, and 3 minutes.
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