10-26-2008 04:21 AM - edited 03-04-2019 12:04 AM
Hi,
We have 2 sites linked by a serial leased line and have been recommended to replace a 1603 router pair with an 1841's, but would like to check if the desired configuration is possible.
We are using Bridge IRB to provide a flat network across the 2 sites but I've seen a previous post stating that ISDN doesn't support that configuration...
http://preview.tinyurl.com/5equv3
Does anyone know if that's correct ?
If we can achieve ISDN backup with Bridge IRB, where could I find out how to configure that ?
Otherwise, can anyone suggest an alterative configuration to achieve ISDN backup to serial link on a flat network ?
Many Thanks
10-26-2008 04:39 AM
Hello Philip,
I would consider to use a second serial link as the backup link.
IRB will run STP and will use only one link but if that link fails the second one is ready to become active.
However, it is possible to use DDR and so ISDN to provide the alternate path:
see
http://www.cisco.com/en/US/docs/ios/12_2/ibm/configuration/guide/bcftb.html#wp1002619
Hope to help
Giuseppe
11-04-2008 05:18 AM
Thank you Guiseppe,
That link was useful.
I'm not sure which way we're going to go yet.
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide