I have 5 brnaches require to connect to HO router via ISDN when primary link goes down in any of the branch routers. I need to configure all available (4) BRI ports in HO router to connect from branch ISDN router to any of the BRIs ports in HO router.
I have attached HO router and one of branch routers ISDN backup configuration. This network is live at present. So unfortunately I don?t have any risk to do trail error. Appreciate any one can advise me required configurations or have a look on my attached configuration.
OSPF has been used as a routing protocol and dialer watch is used to watch to primary link down.