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Cisco Bug: CSCuw37626 - Unexpected BFD/BGP monitor failure due to ports down result in call loss

Last Modified

Dec 25, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

19.0.0.61411

Description (partial)

Symptom:
On executing the cli show srp call-loss statistics it is observed that more than 700K subscribers are lost due to an  Unexpected Chassis-Chassis BFD monitor failure on Newly Active CISCO ASR5500.

[local]Sachin# show srp call-loss statistics
Switchover-1  started at : Mon Sep 21 16:24:24 2015,  took 14 seconds to finish.
    Switchover reason : Chassis-Chassis BFD failure
    Total number of active calls at switchover time    : 5855074
    Total number of VoLTE capable subscribers          : 0
    Total number of subscribers engaged in voice calls : 0
    Total number of VoLTE capable subscribers lost     : 0
    Total number of voice engaged subscribers lost     : 0
    Total number of lost calls at switchover time   : 761716       13.01%
                                  Chkpt never sent  : 761716       13.01%
                                      Chkpt failed  : 0             0.00%
[local]Sachin#

Conditions:
This issue is observed when a Call-Model comprising of GTP-LTE, GTP-S2B-LTE, eHRPD, GGSN subscribers without any other redundancy actions being performed.
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