cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements

Community Helping Community

213
Views
0
Helpful
2
Replies
Enthusiast

RAS backup: 2 backup ISDN sites

Somebody knows how can I configured 2 backup ISDN sites? For example: if I cannot call the firs backup site I Should call the second site.

Alex

2 REPLIES 2
Frequent Contributor

Re: RAS backup: 2 backup ISDN sites

check out the following link for configuring ISDN DDR backup links using BRI`s and dialer watch :

http://www.cisco.com/en/US/tech/tk801/tk379/technologies_configuration_example09186a0080094143.shtml

check out the following link for Configuring DDR Backup For ISDN With Dialer Profiles :

http://www.cisco.com/en/US/tech/tk801/tk133/technologies_configuration_example09186a0080094cb0.shtml

Highlighted
Contributor

Re: RAS backup: 2 backup ISDN sites

This is fairly trivial to do using EIGRP and dialer watch. The trick is to define different "target" IP addresses for each level of backup, define a unique dialer watch for each dialer, and filter the EIGRP advertisements on the lower priority dialer so the preferred dialer keeps dialing even when connect with the backup dialer.

I've been doing this for years for several clients and except for various IOS bugs on various platforms, it works like a champ. Before dialer watch was available, I used to use BGP to provide "interesting

traffic" so I could do it with vanilla DDR. There is a white paper on my web site describing how I used to do it with BGP, the same tricks work with dialer watch.

Good luck and have fun!

Vincent C Jones

www.networkingunlimited.com

CreatePlease to create content
Content for Community-Ad
FusionCharts will render here