We are Planning to have an upgrade on the Nexus 7000 to the version 7.3.3.D1.1.
In our infrastructure, we have FEX , some of them are dual home and other are single Homed..
As described in the link below the ISSU is not supported when we have Dual Homed Host (Active/Active) and Active-Active FEX Design
https://www.cisco.com/c/en/us/support/docs/switches/nexus-2000-series-fabric-extenders/200363-nexus-2000-fabric-extenders-supported-un.html#anc18
so if we have to go with the disruptive upgrade, the servers connected to the FEX will lose connectivity for about 15 min ( time estimated for the FEX to be upgraded) .
The problem is we can't afford 15 min downtime... Any suggestion ?
