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Cisco Bug: CSCuq99797 - BGP Route-Target not advertised when rtfilter address family in use

Last Modified

Sep 14, 2019

Products (16)

  • Cisco IOS
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ME 3600X-24TS-M Switch
  • Cisco ASR 901S-4SG-F-D Router
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901S-2SG-F-D Router
  • Cisco ASR 901-6CZ-FT-A Router
  • Cisco ASR 901-12C-FT-D Router
  • Cisco ASR 901S-3SG-F-D Router
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Known Affected Releases


Description (partial)

In a rare timing condition, BGP Route-Target Filter not advertised when rtfilter address family in use.

In the lab it is found that the behavior is intermittent and is seen when BGP / IGP Sessions are cleared or the devices are rebooted.

On the device see notice following:

n ASR903 it was showing following:

CKKPBULNPAR001#sh bgp rtfilter unicast default 
BGP routing table entry for 0:0:0:0, version 31309
Paths: (3 available, best #2)
Flag: 0x1900
  Advertised to update-groups: (Pending Update Generation)  >>>>>>>>>>> Not advertised
  Refresh Epoch 1
  Local (metric 160) from (
      Origin IGP, metric 0, localpref 100, valid, internal
      Originator:, Cluster list:,
      rx pathid: 0, tx pathid: 0
  Refresh Epoch 1
  Local (metric 80) from (
      Origin IGP, localpref 100, valid, internal, best
      rx pathid: 0, tx pathid: 0x0
  Refresh Epoch 1
  Local, (default-originate) from (
      Origin IGP, localpref 100, external
      Community: no-export
      rx pathid: 0, tx pathid: 0
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