We have a requirement to upgrade the ESXi from 4.1 to 5.1 -> which is forcing us to upgrade our N1K environment. We were planning to upgrade the existing Nexus 1010 to 4.2(1)SP1(5.1a), and we have 3 x VSM's which needs to be upgraded to 4.2(1)SV2(1.1a)... Logical sequence of events would be:
1) upgrading nexus 1010
2) upgrading n1kv - vsm1
3) upgrading n1kv - vsm2
4) upgrading n1kv - vsm3
5) then upgrade the VEM, vcenter and ESXi
my question is - I have a spare nexus 1010 pair.. can i do all the upgrades offline, and just have a single change to swap the Nexus 1010's ? I can avoid multiple changes, multiple downtimes if i have to do all upgrades online... Anyone sees any issues with the hot swap of boxes (with all upgraded NX-OS's) ?