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Cisco Bug: CSCuj30680 - Continuous tracebacks @ udld_send_update upon disabling fast-udld

Last Modified

Oct 07, 2015

Products (1)

  • Cisco Catalyst 6000 Series Switches

Known Affected Releases

15.1(1)IB273.153

Description (partial)

Symptom:
Continuos tracebacks/cpuhog messages for UDLD Pseudo Preemption Process with Task running for 28 msecs.

Conditions:
Fast udld should be enabled on some ports (here we saw it for 6 ports). Flap one of these ports. This brings that link into udld linkup phase. This happens when fast udld is disabled from other ports when one of the port is in link-up phase. Till now issue has been seen only on fex ports.
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