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Cisco Bug: CSCsy92142 - The Serial interface on a choc48 linecard stays in UP/DOWN state

Last Modified

Jan 31, 2017

Products (1)

  • Cisco 12000 Series Routers

Known Affected Releases

12.0(32)S11o

Description (partial)

Symptoms: The serial interface on a channelized OC48 linecard stays in the 
UP/DOWN state after encountering Layer 1 alarms (PRID or PAIS). The interface 
continues to be in the UP/DOWN state even after the Layer 1 alarms are 
cleared. 
 
The interface is configured for PPP encapsulation, and path level delay 
triggers are enabled on this interface. The link shows UP, but the PPP 
negotiation will be stuck in Echo Request Sent.

Conditions: This symptom is observed with a 12.0(32)S11o-based image for 
channelized DS3 Engine 3 linecards with alarm delay triggers configured. The 
problem will be seen only with momentary path level alarms.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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