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Cisco Bug: CSCvs50559 - After LC reload, OSPF comes up before ug_merge is completed

Last Modified

Sep 02, 2020

Products (11)

  • Cisco ASR 9000 Series Aggregation Services Routers
  • Cisco ASR 9910 Router
  • Cisco ASR 9922 Router
  • Cisco IOS XR Software
  • Cisco ASR 9010 Router
  • Cisco ASR 9904 Router
  • Cisco ASR 9006 Router
  • Cisco ASR 9001 Router
  • Cisco ASR 9901 Router
  • Cisco ASR 9906 Router
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Known Affected Releases


Description (partial)

After LC reload, OSPF comes up before ug_merge is completed

Issue is seen only if below is the sequence of events.
1) Death node notification is received:-
2) IM Delete notification:-
3) First RIB CREATE notification:-
4) Second RIB Create Notification.
5) First RIB merge Notification.
6) IM create callback is received
7) Second RIB merge Notification is received.
After step 5, ug_merge is true.

Here, IM create notification comes between the first and second ug merge notification.  Since we setup ug_merge notification true in step 5 we end up sending UG merge notifcation to clients upon IM create notification.
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