VPN hostname resolving in config

[sprocket10]

I am trying to create my vpn tunnel to use host names rather than ip, so in the event we change ip addresses I don't need to modify a load of routers.

However when I enter my commands as below, the hostname automatically resolves and when I do a show run, it displays the ip address again. How do I get the config to save with the hostnames?

edited config, selected commands used:

crypto isakmp peer hostname <dns name>

&

set peer <dns name>

[Marvin Rhoads · Accepted solution]

You cannot use FQDN peer hostnames with an IPsec LAN-LAN VPN that uses pre-shared keys for authentication.

To do that, you would need to deploy certificate-based authentication.