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Cisco Bug: CSCup33759 - ISIS IPv6 distribute-list filter not removed when interface deleted

Last Modified

Dec 13, 2017

Products (24)

  • Cisco IOS
  • Cisco ASR 901-6CZ-FS-D Router
  • 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 901S-2SG-F-D Router
  • Cisco ASR 901S-2SG-F-AH Router
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901-6CZ-FT-A Router
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Known Affected Releases

15.3(3)S 15.5(2)S

Description (partial)

Symptom: ISIS IPv6 distribute-list filters of the form:

router isis
 address-family ipv6
  distribute-list prefix-list {name} in {interface}

should be removed from the configuration when the specified interface is deleted or is no longer enabled for IPv6. In some cases this is not happening, which can cause errors when a saved configuration is used during a subsequent reboot.

On systems with a redundant RP, configuration sync will fail because the distribute-list command will be rejected by the standby RP.
Conditions: This symptom is observed when using ISIS to route IPv6 traffic.
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Bug Details Include

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