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Cisco Bug: CSCtc59318 - All BGP sessions flap if any prefix has more than 255 paths

Last Modified

Jan 31, 2017

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)


A cisco router running BGP willl reset all of the sessions to the established
BGP neighbors If any route (VPNV4 or IPV4 etc.)  is learned with more than
255 paths.


BGP peering must exist with more than 255 peers and the same prefix must
be learned/advertised from all those peers hence resutling in more than 255
paths for that prefix.
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  • Status
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