yes this is possible. The simplest way i can think of is to run HSRP between the 2 routers ethernet (LAN) interfaces. Set the primary router to have the higest priority (say 200) and the ISDN router to have the lowest priority (say 100). As for the ISDN Router Config you'll have to figure out how you want it to work. always up or dial on demand type of thing.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.