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Cisco Bug: CSCuq91488 - not punt BFD packet to RP even BFD state changed from DOWN to UP

Last Modified

Oct 31, 2019

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)

ASR1k not punt BFD packet to RP even BFD state changed from DOWN to UP
On ASR1K side, the recored packet should be cleared after session changing from UP to DOWN.

When ASR connected with a 3rd party device, at the situation below, ASR may think the UP packet as the same with the previous one, and drop the packet due to leak mechanism.
       In Cisco's implementation, "diag" field is cleared when BFD tries to re-establish the session. But the 3rd party device doesn't clear this field.
      And after session becoming UP, in Cisco's implementation, it will send out a BFD packet with "Poll=1". But Juniper doesn't send "Poll=1" packet.
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