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Cisco Bug: CSCul70386 - Maxaged LSA with failure reason "Ack count not zero" is seen in OSPFv3

Last Modified

Nov 27, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

4.3.1.BASE

Description (partial)

Symptom:
A maxaged LSA (with age much bigger than 3600) might be present in the ospfv3 database, and on the maxage list.
The reason for not deleting the LSA (which can be displayed with "show ospfv3 database <LSA_type> <LSA_ID> internal" is "Ack count not zero"

Conditions:
The problem may happen under special timing conditions, when the interface goes down in ospfv3 while the process was waiting for an ACK for that LSA from the interface.

Related Community Discussions

IOS-XR: OSPFv3 MaxAge LSA が Link State Database に残留する
2015年7月9日(初版) TAC SR Collection 主な問題 IOS-XR シリーズルータにおいて OSPFv3  を使用している際に、LS Age が MaxAge 3600 を超えた LSA が Link State Database  から消えることなく残留します。 対向 OSPFv3 Neighbor から LS Ack 待ちをしているインタフェースが Down するタイミングで発生します。 &lt;確認方法&gt; show ospfv3 database internal コマンドにて MaxAge LSA の Failure reason が &quot;Ack count not zero&quot; であることを確認して下さい | RP/0/RSP0/CPU0:ASR9K# show ospfv3 database external internal adv-router 100.0.0.2 -- snip --             Type-5 AS External Link States   Delete flag is set for this LSA   Last delete ...
Latest activity: Jul 26, 2015
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