Backup link configuration

[anand_vns]

Dear All

I have a cisco 1721 router with WIC-2T card. I need to configure its ethernet port as a backup port so that when the serial port gets down it autometaclly route the trafic to the ethernet port.

Is this configuration is possible and if yes pls send the related configuration document.

I hope your immediate reply.

With Regards

Anand

[Georg Pauwen]

Hello Anand,

the most simple solution would be to configure a floating static default route:

ip route 0.0.0.0 0.0.0.0 Serial0

ip route 0.0.0.0 0.0.0.0 Ethernet0 200

What kind of connectivity do you have on your serial interface (Frame Relay, PPP) ?

Regards,

GP

[anand_vns]

Dear GP,

The Serial interface has PPP connectivity.

With Regards

Anand

[Georg Pauwen]

Hello Anand,

ok, with PPP, the floating static routes should work, since the interface goes down when connectivity is lost. It would have been a problem with Frame Relay, since the interface itself would not go down unless all DLCIs go down...

Are the static routes a feasible solution for you, or do you need to run a dynamic routing protocol ?

Regards,

GP