11-13-2009 01:01 AM - edited 03-06-2019 08:35 AM
Hi all:
A customer told me he did an upgrade from a VSS (2 6500 equipments). He loaded the new IOS on appliances and reboot the Standby-HOT unit. At this moment he noticed the service was down for 30-40 seconds and I think it's impossible cause all connections were redundants and should be managed by active unit.
I'm gonna to upgrade a VSS and I'd like to know if the customer afirmation is correct.
Thanks
Solved! Go to Solution.
11-13-2009 07:00 PM
If you just upgrade the stand-by and reboot, due to different versions of code the VSS goes in to dual-active mode
Take a look at this document (all the way at the bottom). You have to follow the instruction on how to use eFSU without loss of any connectivity.
http://www.ciscosystems.lt/en/US/prod/collateral/switches/ps5718/ps9336/white_paper_c11_429338.pdf
HTH
Reza
11-13-2009 05:21 AM
Francisco,
If use eFSU to upgrade your VSS pair, There should not be any down time. You just lose 50% of your capacity for a few minutes. At list this was the case with mine.
HTH
Reza
11-13-2009 11:22 AM
Thanks for the reply.
The customer didn't use eFSU. But I dont understand the reload of Standby unit might produce lost of service when I have all connections working through Active unit.
Regards
11-13-2009 07:00 PM
If you just upgrade the stand-by and reboot, due to different versions of code the VSS goes in to dual-active mode
Take a look at this document (all the way at the bottom). You have to follow the instruction on how to use eFSU without loss of any connectivity.
http://www.ciscosystems.lt/en/US/prod/collateral/switches/ps5718/ps9336/white_paper_c11_429338.pdf
HTH
Reza
11-14-2009 01:29 AM
Thanks for the link Reza, I had another older.
I click on your response like Resolve but reading the document you post I could see the proccess when you upgrade a VSS without eFSU.
It doesn't tell anything about VSS changes to dual-active mode when an upgrade is done, it comments VSS works at 50%:
"After successful bootup of the switch 2 (standby virtual switch) to the new image or file system, verify the peer relationship between supervisor engines are in RPR state (cold standby). At this stage, the Cisco Virtual Switching System will be operating at 50-percent capacity."
I am confuse about it then...
11-14-2009 07:36 AM
Hi.
It would be great to see the logs from console when the upgrade was done. If it is done correctly you should _not_ end up in a dual-active situation. The fact that you (or rather, your customer) di, suggests that soemthing might not have been configured correctly.
If possible, could you post config to the forum?
HTH, Ingolf
11-14-2009 08:09 AM
Francisco,
I have used the same document to upgrade my VSS pairs with no problems. Like Ingolf said, there may be some thing else missing in your customer's config.
Here is the configuration guide for the 6500 using eFSU to upgrade.
HTH
Reza
11-16-2009 10:05 AM
Hello:
I've requested the configuration to the customer.
Many thanks
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide