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Cisco Bug: CSCur22750 - Asr9k-5.1.3 --BFD in INIT state on BE with mpls ip-ttl-propagate disable

Last Modified

Sep 26, 2018

Products (8)

  • Cisco ASR 9000 Series Aggregation Services Routers
  • Cisco IOS XR Software
  • Cisco ASR 9922 Router
  • Cisco ASR 9010 Router
  • Cisco ASR 9904 Router
  • Cisco ASR 9006 Router
  • Cisco ASR 9001 Router
  • Cisco ASR 9912 Router

Known Affected Releases

5.1.3.BASE 5.2.2.BASE

Description (partial)

BFD stuck in INIT state after upgrade to to SIT image

With "mpls ip-ttl-propagate disable" ASR9k sends BFD packets with TTL value of 254 instead of 255.

The neighbor devices see bfd packet with invalid TTL and drop it.

F340.03.13-ME-3600X-2#sh bfd drops
BFD Drop Statistics
                        IPV4    IPV6    IPV4-M  IPV6-M  MPLS_PW MPLS_TP_LSP
Invalid TTL             11515    0       0       0       0       0
BFD Not Configured      0        0       0       0       0       0

"mpls ip-ttl-propagate disable" is enabled.
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