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Cisco Bug: CSCut02575 - BGP crash after RPFO due to wrong fragmentation handling during NPL rtx

Last Modified

Jul 20, 2018

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

5.2.4.BASE 5.3.2.BASE 5.3.2.ROUT

Description (partial)

In very rare circumstances, Upon a RP Failover, it is seen that BGP on the new standby crashes. It has to do with dereferencing a NULL attribute-id TLV.
Attribute-ID TLVs are used to sync data structures across partner nodes, once the actual attribute has been shipped across from Active to Standby.

The crash occurs when a comm_id tlv (needed for syncing attributes between active and standby) sent from the Active to the Standby can't be retrieved by the latter because it is not present in its database.

A null attribute is returned in the case above and de-referencing it causes the crash. In the few times this was seen there was MVPN configuration present on the router. 

It appears as a condition
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