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Cisco Bug: CSCvs72126 - ASBR is not including the P-bit after the switchover.

Last Modified

Aug 29, 2020

Products (65)

  • Cisco IOS
  • Cisco Catalyst 9200L-48P-4X Switch
  • Cisco Catalyst 9300-48UXM-A Switch
  • Cisco Catalyst 9400 Supervisor Engine-1XL-Y
  • Cisco Catalyst 9300-48T-A Switch
  • Cisco Catalyst 9410R Switch
  • Cisco Catalyst 9300-48U-A Switch
  • Cisco Catalyst 9300-48P-A Switch
  • Cisco Catalyst 9800-40 Wireless Controller
  • Cisco Catalyst C9500-32QC Switch
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Known Affected Releases


Description (partial)

A NSSA-area ospf ( NSR / Graceful-restart configured ) is performed a switchover, the Type-7 generated by the ASBR does not include the P-bit causing this problem.

Switchover at the ASBR router and will not include the P-bit 

output  from the ASBR neighbor as soon as the switchover is performed 

                Type-7 AS External Link States (Area 1111)

  LS age: 159
  LS Type: AS External Link
  Link State ID: 0
  Advertising Router:
  LS Seq Number: 80000002
  Checksum: 0xA47B
  Length: 52
  Prefix Address: 2001:DB8:5554::
  Prefix Length: 46, Options: None  <<< not in placed
  Metric Type: 2 (Larger than any link state path)
  Metric: 20 
  Forward Address: 2003::1:1

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