vss

[susim]

Hi ,

Is there a possibility of split brain in vss . If yes how to fix it , 

How can i verify that all vss running ok ?

Thanks  

[Madhukrishnan Gopinathan Nair]

Yes there is a possibility of split brain in VSS if the VSL link completely goes down.

There are detection mechanism and recovery option such as fast hello etc.

To verify vss running ok use the below.

sh switch virtual

Please have reading of the below to know more in detail.

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/vss.html#wp1063718

Thanks,

Madhu

**** Please rate useful posts***

[susim]

Thanks madhu , 

nsf is required or is an optional , in simple words what nsf can benefit 

Thank you 

[Madhukrishnan Gopinathan Nair]

I think if you are running routing protocols over these VSS it would be recommended to have NSF aware. NSF is a feature that allows seamless flow of routing protocols such BGP while sup switchover happening.  I believe most of the IOS are NSF aware. You can do sh ip protocols to check if it is NSF aware.

Hope this helps and do rate my posts if found to be useful.

Madhu