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New Member

question on backup

Hi, I am trying to implement a Frame Relay network with DDR ISDN as backup to connect 2 offices.

With reference to the figure below :

Router1---S1----Frame Relay----S0---Router2

\----Bri0--------ISDN--------Bri0----/

My question is :

Is it possible to implement such that if Router2 detects a failure on S0, it will trigger the ISDN line.

The same goes for Router1 triggering the ISDN upon detecting an S1 failure.

2 REPLIES
New Member

Re: question on backup

Yeah. See http://www.cisco.com/warp/customer/471/backup_cookbook.html

Very thorough discussion with numerous examples.

New Member

Re: question on backup

sorry, I had interpreted my question wrongly earlier.

With reference to the figure below :

Router1---S1----Frame Relay----S0---Router2

\----Bri0--------ISDN--------Bri0----/

My question is :

1. Is it possible to implement such that Router2 will trigger the ISDN line upon detecting a failure on S0 ?

2. Will Router2 also trigger the ISDN upon detecting a failure in S1 (with S0 functioning fine) ?

With reference to this cisco site : www.cisco.com/warp/public/123/backup-main.html

At the Summary Table :

What does it actually mean when it says "Limited to one router, one interface." at the Backup Interface ?

Does it mean that only 1 router can be enable with backup (with reference to figure above) ?

Appreciate for any help to explain.

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