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Catalyst 4500 L3 switch sending unknown LS types

RonelPaul96063
Level 1
Level 1

Hello All,

 

Hope everyone is fine and  staying safe.

 

Currently facing some issue with the cisco devices.

 

 

Cisco routers with IOS versions:

C2900 Software (C2900-UNIVERSALK9-M), Version 15.1(4)M4,

Catalyst 4500 L3 Switch Software (cat4500-ENTSERVICESK9-M), Version 15.0(2)SG10

are sending the wrong LS type for Unknown Area Link States (We have Network Elements (WDM)) in their Database description packets (as per RFC5340).  When the NE issues LSA requests for these LSAs the LS updates have the correct LS type but because they don't match what was in the DD packet the NE thinks it still hasn't received all the LSAs. This is an issue as it results in NE interfaces getting stuck in the loading state and as a result OSPFv3/IPv6 routing issues.

 

The issue is seen only on Catalyst 4500.Does any one know if this is fixed in any of the new IOS releases.

 

Any help is appreciated.

2 Replies 2

balaji.bandi
Hall of Fame
Hall of Fame

Can you show us some example and logs ? also post configuration.

BB

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RonelPaul96063
Level 1
Level 1

Here is the wireshark  capture.

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