9404's quad sup's stackwise virtual and ISSU upgrades

[dcarr3311]

Hi 

I want to deploy a pair of 9404's with Quad Sup's connecting using stackwise virtual. Does anyone know if there is any limitations for using ISSU upgrade for the 2 switches connected this way? I need to assure minimal downtime.

thanks 

Dan 

[balaji.bandi · Accepted solution]

I do not see any issue here, that is the reason we choose Quad Sup for minimal downtime, (but make sure your configuration SVL and end device dual-homed ensure end device connection work as expected.

https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-9000/nb-06-cat-9k-stack-wp-cte-en.html

upgrade :

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9600/software/release/17-2/configuration_guide/ha/b_172_ha_9600_cg/quad_supervisor_with_route_processor_redundancy.html#id_127866

[dcarr3311]

Hi Balaji

thanks for the response! One last question, I would be able to use the interfaces on the Supervisors to stand up the SVL?

thanks 

Dan 

[balaji.bandi]

yes, that is the requirement for SVL to use SUP cards, look at the post I have advised in the first link , it got SVL configuration.

[dcarr3311]

Hi Balaji

The C9400-SUP-1XL-Y also has two 40gig ports. I'm assuming they can also be used for the Stackwise virtual links? even though not listed on chart above? 

[balaji.bandi]

Personally 10GB good enough, No one likes to waste 40GB optic to check the heartbeat SVL Link ( make sense ?)

[Leo Laohoo]

Have a look at the ISSU Matrix because this is the "general" rule of what can/cannot be done via ISSU.  
Check each version's Release Notes because there are times "exceptions" or "exemptions" contradicts the matrix.  

Lastly, be very careful with ISSU or FSU/eFSU because it is not cracked up as it meant to be. 

Once bitten and I've learnt my lesson -- The drive to the site was very long, lonely, sad and humiliating.