Setup Cisco 836 isdn backup interface when ATM interface is down

Posted on 2004-11-17
Last Modified: 2013-12-29
How can i setup a Cisco 836 adsl Router to activate ISDN backup interfacce when ATM interface is down ?
Question by:hendai67
    LVL 43

    Accepted Solution

    You can use a floating static route (default route if connecting to your ISP).

    ip route <atm interface or atm next-hop-router>
    ip route <isdn interface or isdn next-hop-router> 10 <---administrative distance

    Using a higher administrative distance than the default (0 - interface, 1 - next hop router address), the route will only be used if the primary route (ATM) is removed from the routing table, i.e. the interface is down.

    Author Comment

    Thanks for reply to my question.
    Is there someone with a configuration example ?

    LVL 43

    Expert Comment

    My posted comment was the configuration example.  Two "ip route" statements, one with a higher administrative distance (10).

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