We were running
Cisco ASR 1006 on single
RP2/ESP since long time but today two purchased secondary (standby)
RP2/ESP for redendency. Now question is how do i upgrade IOS on secondary RP2?
I am confused with ISSU method, I thought ASR1006 is hardware redundant so it doesn't need ISSU, so we individually upgrade
R1 without any ISSU, i may be wrong. can someone explain how does ISSU process work and how i can use it to upgrade ASR1006?