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Cisco Bug: CSCuw54883 - BGP next hop Recursion Loop RIB and CEF issue

Last Modified

Jun 01, 2017

Products (17)

  • Cisco IOS
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ME 3600X-24TS-M Switch
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901-6CZ-FT-A Router
  • Cisco ASR 901-12C-FT-D Router
  • Cisco 7600 Series Route Switch Processor 720 with 10 Gigabit Ethernet Uplinks
  • Cisco 7600 Series Route Switch Processor 720 with Multilayer Switch Feature Card
  • Cisco ME 3600X-24CX-M Switch
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Known Affected Releases

15.3(3)S4

Description (partial)

Symptom:BGP route is programmed into the RIB when the route is not present in IGP and cef stays in unresolved state in a recursive lookup scenario. The route is being learnt recursively from the BGP update and route is installed in the RIB.

"show  ip route loop" shows the route as looped


Conditions:Next hop is being learnt from BGP update. route is not present in IGP and default route is present in IGP for next hop
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