Guest

Preview Tool

Cisco Bug: CSCut02317 - prm_server_to runs out of memory with non-contiguous high scale RIB

Last Modified

May 09, 2018

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

5.3.0.BASE

Description (partial)

Symptom:
prm_server_to or prm_server_ty memory consumption is unexpectedly high. If the allocated maximum is reached, the process crashes:

LC/0/2/CPU0:Feb 17 10:56:32.702 : dumper[55]: %OS-DUMPER-7-DUMP_REQUEST : Dump request for process pkg/bin/prm_server_to 
LC/0/2/CPU0:Feb 17 10:56:32.705 : dumper[55]: %OS-DUMPER-7-DUMP_ATTRIBUTE : Dump request with attribute 7 for process pkg/bin/prm_server_to 
LC/0/2/CPU0:Feb 17 10:56:32.705 : dumper[55]: %OS-DUMPER-4-SIGNAL_NUMBER : Thread 1 received SIGNAL 31, si code 0, si errno 0

Conditions:
Observed on Typhoon and Tomahawk generation of line cards of the ASR9000 series routers when a high number of sparsely populated prefixes is advertised by the peers. The more contiguous the learned prefixes, the less memory is required by the prm_server_to or prm_server_ty process for storing the prefixes in the memory.   This failure will only be seen with very large scale, ie millions of routes.
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)
  • 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.