Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

ISDN Backup Link

We have 3 sites connected using a managed firewall/VPN solution.

This is a full mesh setup where Site A,B and C have redundant routes.

The ISP we have a contract with has persistant quality issues at Site A.

We need to have A and B in constant communication due to an ERP application that is time and delay sensitive.

We want to setup 3 Cisco 2600's and implement an ISDN backup link that will initiate a connection when any one of the VPN connections/interfaces goes down.

We plan on creating 2 interfaces per router. One pointing to the default route on the VPN device, the second will be the backup ISDN interface configured to dial another sites ISDN link.

Problem: The provider we are currently using will not enable dynamic routing

for devices not in their cloud unless we pay them $$$.

How can we configure the backup ISDN links to initialze if any of the VPN links go down?

Thanks in advance for any assistence.

1 REPLY
New Member

Re: ISDN Backup Link

As you have told, you can have 2 interfaces per router.One is the main inteface whis is the VPn inteface and the backup interface is the ISDN interface.

You can give the following commands:

int

backup interface < secondary interface>

backup delay

Instaed of dynamic routing you can give the static route.

Hope this will help.

More information,go through the follwoing URLs:

http://www.cisco.com/en/US/products/hw/routers/ps221/products_data_sheet09186a008008871a.html

http://www.cisco.com/en/US/tech/tk648/tk367/technologies_configuration_example09186a0080094c1f.shtml

88
Views
0
Helpful
1
Replies
CreatePlease login to create content