We are in a situation where we are going to be moving to a different ISP and therefore, we would need to change our external IP addresses to 4 of our Cisco 1921 routers. Those routers are used only for VPN tunnels for our clients. Is there any suggestion how can we change our current public IP address given below references from our sh run:
ip address 22.214.171.124 255.255.255.240
ip default-gateway 126.96.36.199
ip route 0.0.0.0 0.0.0.0 188.8.131.52
can you direct me what are the commands to change the current IP address + gateway IP? Also, apart from sh run, do you think there is anything else I need to check in the router in relation to the external IP change?