We have 2 sites linked by a serial leased line and have been recommended to replace a 1603 router pair with an 1841's, but would like to check if the desired configuration is possible.
We are using Bridge IRB to provide a flat network across the 2 sites but I've seen a previous post stating that ISDN doesn't support that configuration...
Does anyone know if that's correct ?
If we can achieve ISDN backup with Bridge IRB, where could I find out how to configure that ?
Otherwise, can anyone suggest an alterative configuration to achieve ISDN backup to serial link on a flat network ?