Preview Tool

Cisco Bug: CSCtb08699 - Buffer Leaks cause Control plane to drop all traffic

Last Modified

Feb 01, 2017

Products (1)

  • Cisco 12000 Series Routers

Known Affected Releases


Description (partial)

Symptoms: The traffic flow between the Cisco 12000 series PE routers and the 
core CRS router stopped unexpectedly without any trigger, and the linecard 
had to be reloaded for recovery. 

Conditions: The packet buffers in the ingress direction of the core-facing 
linecards of the Cisco 12000 series were gradually being depleted. Once this 
happened, all the incoming packets were dropped as seen in "no mem drop" 

LC-Slot1# show contr tofab qm stat

135590 no mem drop, 193180 soft drop, 4167963929 bump count 0 rawq (High 
Priority) drops, 0 rawq (Medium Priority) drops, 0 rawq (Low Priority) drops 
0 dnq1  drops, 0 dnq2 drops 0 no memory (ns), 0 no memory hwm (ns) no free 
0       126499  61990   15125
36      0       0       0
0       0       0       0
0       0       0       0
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.