[c-nsp] Nexus 7000 - vPC during NX-OS upgrade (ISSU)

[Manu Chao]

I need to upgrade (ISSU) multiples N7K Dual Supervisor running vPC domains
from NX-OS 4.2(6) to 5.1(1a).

Planned to upgrade first vPC operationnal Secondary chassis then Primary.

I have 2 questions:
- Do you know if vPC is compatible with ISSU?
- Does vPC work between NX-OS 4.2 and 5.1?

Thanks for your input
Manu