Need to Re-ip the VIPs, Self-ips and mgmt IPs

if the old 4.... gateway will be no longer reachable or the route will no longer valid, then you should remove that entry.

to reduce the downtime, add the new f5 config (based on the 10..... ip),
then change config in upfront nodes to send traffic to the 10..... vips,
then delete the 4..... configs