[northlandboy]

Possibly. It depends if it's directly connected to those devices or not.

This is not a Check Point question, it's a standard Ethernet question.

ARP entries are cached on surrounding devices. If you move an IP address to another physical device, surrounding devices may need to have their ARP caches cleared, or you can just let them time out.

Not really a big deal at all.

SIC doesn't need to be touched at all.