Configuration restrictions and guidelines
The active MPU cannot be isolated.
If only one switching fabric module is working on the switch, it cannot be isolated.
Before upgrading a logic of the LPU, keep the LPU offline.
To minimize the interference on the system operation, force a switching fabric module that is operating normally offline before you unplug it.
You can use the display device command to view whether a card is isolated, or, whether the card is in the offline state.
Do not perform other configurations on the isolated card.