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VSS Switchover (Switchback) 4500X

Is there a way that you can configure a 4500X VSS stack to automatically failback to the primary switch after a secondary switch failure or upgrade.  I upgraded the IOS on a 4500X VSS stack and reloaded the secondary switch first and then the primary.  Thus my secondary switch is now the active one. 

I know I can either just do a reload on the active switch or do a "redundancy force-switchover" command (which will reboot the active switch)

However:

1. Is there a way to set the configuration so that VSS falls back to my primary switch once it is back online (preferably without reloading the switch)

and

2. Is there a command to fallback to my primary switch without having to reload the active switch? 

Jim

1 ACCEPTED SOLUTION

Accepted Solutions
VIP Advisor

Hi

Hi

Yes you have a way to already ensure that your switch is the primary one within your vss cluster by using the preempt capability. However it's not recommended because it can cause lot of reboots and traffic disruption.

Take a look here:

http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Campus/VSS30dg/campusVSS_DG/VSS-dg_ch2.html#wp1064580

Every time you switchover, the actual active must reboot to become standby. No way to achieve that without reboot.

Thanks

PS: Please don't forget to rate and mark as correct answer if this answered your question 


Thanks
Francesco
PS: Please don't forget to rate and select as validated answer if this answered your question
4 REPLIES 4
VIP Advisor

Hi

Hi

Yes you have a way to already ensure that your switch is the primary one within your vss cluster by using the preempt capability. However it's not recommended because it can cause lot of reboots and traffic disruption.

Take a look here:

http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Campus/VSS30dg/campusVSS_DG/VSS-dg_ch2.html#wp1064580

Every time you switchover, the actual active must reboot to become standby. No way to achieve that without reboot.

Thanks

PS: Please don't forget to rate and mark as correct answer if this answered your question 


Thanks
Francesco
PS: Please don't forget to rate and select as validated answer if this answered your question
Explorer

Thanks for the info.  I think

Thanks for the info.  I think I'll leave things as they are per your recommendation. 

That being said, any idea on how I can make sure the OOB management port works if the second switch becomes active?  My configuration only shows one OOB management port for the whole stack even though I have 2 and they are both physically connected to the network. 

VIP Expert

That being said, any idea on

That being said, any idea on how I can make sure the OOB management port works if the second switch becomes active? 

When the primary switch fails, the secondary switch will take over. As long as you have a cable connected to the OOB port of the second switch, connected to the same OOB switch, and in the same vlan it should just work fine.

BTW, when this happens while you are connected to the first switch, you will lose connectivity for about 10 seconds than you can log back in to the second switch.

HTH 

VIP Advisor

Hi

Hi

Sorry for my late answer but I was at work and I'm in the EST timezone then my answer should be delayed.

Anyhow, you get the answer from Reza Sharifi.

Thanks

PS: Please don't forget to rate and mark as correct answer if this answered your question 


Thanks
Francesco
PS: Please don't forget to rate and select as validated answer if this answered your question
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