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Community Member

Dial Backup

My remote router located at the other end of the Frame relay WAN could not initiate a dial back when the mainlink is down,

Previously using the leased line connection, dial backup will having no problem connecting through PSTN when the mainlink is down (leased line)but when we begin to convert our leased line to frame relay the problem surfaced. The signals in interface where the Mainlink (frame relay) are all up, though the backbone is down, with this situation the dial backup modem will not start.

4 REPLIES
Community Member

Re: Dial Backup

I'm guessing here that when the problem occurs, though the PVC in the carriers is down, but on the router serial interface it still shows as UP and UP right? Another word LMI and PVC status still up between the router and the FR cloud. I have this problem before and it is directly related to the command "backup-interface ..." configured under the serial interface. To get around this problem, I simply take that command off the serial interface and use floating static route instead. Another word I rely simply on the L3 to provide me backup link. Let me know if this work.

Community Member

Re: Dial Backup

Thanks but could i get more details on how will i do it.

use floating static route instead. Another word I rely simply on the L3 to provide me backup link.?

Community Member

Re: Dial Backup

Absolutely. Use L3 to provide backup. I've tested the L2 stuff (backup-interface) several times but always fail. Since using L3, it never failed on me. With floating static route, I'm using an AD value of 200 for my floating static route. That is "ip route x.x.x.x y.y.y.y z.z.z.z 200".

Community Member

Re: Dial Backup

Thanks ill try your advice..

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