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Cisco Bug: CSCtb52260 - OSPF MD5 authentication link failure on reload

Last Modified

Jun 17, 2016

Products (1)

  • Cisco Nexus 7000 Series Switches

Known Affected Releases


Description (partial)

Symptom:OSPF configured using MD5 authentication returns "bad authentication" errors after a line card restart.

Conditions:The bug is applicable in the following configuration scenario.

(1)  If there is any area level authentication command  - i.e., area <area-id> authentication [message-digest]  followed by any authentication type such as md5.
(2)  No other area level command such as NSSA/stub (area <id> nssa/stub), cost (area <id> default-cost) or address-range is configured.

The bug will be triggered if either 
(1)  All interfaces belonging to that area are unconfigured followed by a configuration of any interface(s) in that area, then those interfaces will not inherit the authentication command from the area and there will be authentication errors for these new interfaces.

(2) All interfaces belonging to the area are on a particular line card, and the line card goes through a reload, then there will be authentication errors seen on those interfaces, once they are up again.
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