A router can, through misconfiguration, have an advertise address that points a different router. This can result in a router trying to establish a link to the wrong router, or multiple links to the same router, thinking that it's dialing two different routers.

To address this:

1. Add the id of the router being dialed to the dial request
2. If this value is provided to the listening router, it can verify that the id matches its own id
3. If the ids don't match, reject the connection and log an error.

This will ensure that we don't end up with flip-flopping links due to duplicate link rejection.

Longer term we could also generate an alert.