I have configured an ISDN BRI as backup link between two sites connected by a frame-relay link. One of routers in one-end was 2522 and was working fine. I relpaced this router by a 2611XM router recently, after replacement the backup ISDN link does not work.
The dialer interface has no been bound to BRI interface. I have two dialer profile: dialer1 and dialer2 to two different sites, diale 2 is bound to BRI0/0:1 but dialer1 is not. with old router (2522) both dialer interfaces are bound to BRI interfaces.
Thank you in advance for any advise.