I have a router with 2 ip address with the authentication by radius.
If one interface fail the router can comunicate with radius by the second interface (it's a backup interface).
On radius I have to configure the ip address of the NAS so, if I configure the ip adress of primary interface, when the router use backup interface the radius don't work.
I have configured 2 NAS, one with the ip address of the primary interface and one with the ip address of the backup interface... but I don't like it....
How I can force the router to use the ip address of a loopback interface?
Are other solution?
