ISDN connectivity

sachin_mon · ‎02-25-2009

Hi,

We have a new ISDN router Cisco 3845 connecting to Cisco 7600 Leased line router.We would like to use ISDN as backup.I have attached the network diagram.

Query:

1.Referring to diagram, what is the best way to configure interface A&B and C&D.Is it better to create an L3 port-channel or do we create the bridge group between A&B and C&D ?

2.How the routing will take place when the Leased line will go down if we use bridging between 3845 & 7600?

Rgds./Sack

sachin_mon · ‎02-25-2009

Hi,

I have attached the network diagram.

Rgds./Sack

paolo bevilacqua · ‎02-25-2009

No, you never use bridging for backup.

Configuring backupo correctly can be tricky and require professionality.

Recommend you hire a certified/experienced person for the job.