Cisco Bug: CSCtd78587 - Crash when recovering a port which was err-disabled twice
Jan 27, 2017
- Cisco Catalyst 6000 Series Switches
Known Affected Releases
Symptoms: A Cisco Catalyst 6000 switch running Cisco IOS Release 12.2SX software might crash under rare conditions when err-disable recovery tries to recover a port. The following messages are seen in the logs before the switch resets itself: %CPU_MONITOR-6-NOT_HEARD Conditions: This symptom may be observed after the following sequence of events: 1. An interface on the switch gets err-disabled as expected due to a certain feature; for example, due to BPDU Guard 2. Shortly after, before BPDU Guard err-disable recovery kicks in, the same port gets err-disabled for a different reason; for example, because a diagnostic error is detected on the already err-disabled port 3. Err-disable recovery (BPDU Guard) tries to recover the port and this leads to the crash.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.
Bug Details Include
- Full Description (including symptoms, conditions and workarounds)
- Known Fixed Releases
- Related Community Discussions
- Number of Related Support Cases