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Cisco Bug: CSCsz53614 - Incorrect notification sent to OSPF when subinterface added

Last Modified

Feb 15, 2018

Products (1)

  • Cisco IOS

Known Affected Releases

12.2SXF

Description (partial)

Symptom:
  OSPF adjacency on the main interface flaps when an the first sub-interface is 
 created or the last sub-interface is deleted. 
  Conditions:
  Cat6k1 ------ Cat6k2 connected via any gige link with IP addresses configured 
 on both sides
  1. Configure OSPF between these two devices ensure neighbors are in up state. 
  2. Add a subinterface on any one side (e.g. interface GigE2/1.100) and set 
the 
 encapsulation on the interface (encapsulation dot1q 100) 
  3. Notice that the OSPF adjacency on the main interface resets immediately 
 even though the encapsulation on the main interface was not changed.
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  • Status
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