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Connecting 2 routers to be used as fallover

here at work, a company has installed 2 routers, 1 with a dsl port and the other is an isdn bri router, they have linked it so that it ones fails it uses the isdn router ? they are soho 800 routers, I think one of them is in the lan and then the other router is plugged into the back of the other via the hub on the back, will they just use a static route to the dsl port and then another route with a cost to the isdn port ? am i correct ?

7 REPLIES

Re: Connecting 2 routers to be used as fallover

Carl,

If it would have been a single router with a DSL and an ISDN port then you point holds true. It make sned to have two routes one with the active link and the other with a higher metric to be used a floating static route.

I think thet might have used HSRP on the lan between the 2 routers and tracked the DSL interface on the primary router so that in case if that goes down, the LAN will use the other router as gateway and will fire up the ISDN.

HTH, Please rate if it does.

-amit singh

New Member

Re: Connecting 2 routers to be used as fallover

thanks, is this easy to configure, can you please give me an example config ?

Bronze

Re: Connecting 2 routers to be used as fallover

Hi,

Yes, it is simple. I hope this document will help you

http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_feature_guide09186a00801d2d21.html

Abd Alqader

New Member

Re: Connecting 2 routers to be used as fallover

I am a little unsure from these instructions, Could you show me a simple config for the scenario above, whereas I have 2 different routers 1 with dsl that is always used, and the other router has the idsn fallover, I want it to track the dsl so if that goes down it uses the isdn !!

thanks

New Member

Re: Connecting 2 routers to be used as fallover

can anyone help on this matter ?

thanks

Carl

New Member

Re: Connecting 2 routers to be used as fallover

Can you post the config? It would be easier to show what to do.

Richard

Re: Connecting 2 routers to be used as fallover

carl you can have good configuration idea on this

http://www.cisco.com/en/US/products/hw/switches/ps646/products_configuration_guide_chapter09186a00801f0a3f.html

this link showing layer 3 switch but you can have it on router also...

and more help on HSRPon this link: http://www.cisco.com/en/US/tech/tk648/tk362/tk321/tsd_technology_support_sub-protocol_home.html

regards

Devang

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