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Upgrade Catalyst 6807xl Sup6T VSS cluster; 15.4(1)SY2->15.5(1)SY1

Planning to upgrade our Cisco Catalyst 6807xl Sup6T VSS clusters 15.4 (1) SY2-> 15.5 (1) SY1
Can we do it with ISSU or eFSU to get as little interruption as possible?
Finds no information about it when I go from 15.4 (1) SY2-> 15.5 (1) SY1

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Re: Upgrade Catalyst 6807xl Sup6T VSS cluster; 15.4(1)SY2->15.5(1)SY1

Personally i do not recommend ISSU or eFSU , my experience some failures in production environment.

 

Best way to use IOS upgrade in 6807xl without ISSU - no downtime required but recommended to do it in maintenance window

 

reference :

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/15-3SY/config_guide/sup6T/15_3_sy_swcg_6T/virtual_switching_systems.html#16572

 

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