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Cisco Bug: CSCul42259 - XR520:BFD packets getting dropped at NPU in Asr9k for FLEX LSP/MPLS-TP

Last Modified

Jul 21, 2018

Products (6)

  • Cisco ASR 9000 Series Aggregation Services Routers
  • Cisco IOS XR Software
  • Cisco ASR 9922 Router
  • Cisco ASR 9010 Router
  • Cisco ASR 9006 Router
  • Cisco ASR 9001 Router

Known Affected Releases

5.2.0.MPLS

Description (partial)

Symptom:
BFD session for LSP on tp-tunnel flap continuously

RP/0/RSP0/CPU0:May  1 23:59:30.553 GMT: ifmgr[247]: %PKT_INFRA-LINEPROTO-5-UPDOWN : Line protocol on Interface tunnel-tp25, changed state to Up 
\
LC/0/4/CPU0:May  1 23:59:31.852 GMT: bfd_agent[123]: %L2-BFD-6-SESSION_STATE_DOWN : BFD session for LSP with in-label 40 on interface tunnel-tp25 has gone down. Reason: Nbor signalled down 
\
RP/0/RSP0/CPU0:May  1 23:59:31.853 GMT: ifmgr[247]: %PKT_INFRA-LINK-3-UPDOWN : Interface tunnel-tp25, changed state to Down 
\
RP/0/RSP0/CPU0:May  1 23:59:31.853 GMT: ifmgr[247]: %PKT_INFRA-LINEPROTO-5-UPDOWN : Line protocol on Interface tunnel-tp25, changed state to Down }

Conditions:
issues to provision new PW circuits and pinging them.
mpls forwarding with bytes switched set to 0
mpls static labels not seen on the LCs but it is on the RSP.
CEF entries not seen on the LCs but it is on the RSP.
all the LC's show the CEF resources are in Yello state.
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Bug Details Include

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