ason
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ISDN backup for xDSL line
Currently I have a primary 1M primary DSL link going to internet. I'm using DSL modem and a Cisco 1721 router as my gateway. I have BRI S/T interface and need to use my ISDN line as a backup link.
How do i make my ethernet interface go down when my sdsl link goes down? At the moment at my router i have put 'backup interface dialer 1' on my ethernet interface, however the ethernet wont go down when the sdsl line goes down.
Another method i tried was setting the default route going to internet with the ISDN link having an AD of 2 as shown below;-
ip route 0.0.0.0 0.0.0.0 BVI1
ip route 0.0.0.0 0.0.0.0 Dialer1 2
When i disconnected the line, the router wont go through the ISDN even after sometimes. If I remove the line 'ip route 0.0.0.0 0.0.0.0 BVI1' then the router goes through the ISDN link. Any way for me to make this automated.
How do i make my ethernet interface go down when my sdsl link goes down? At the moment at my router i have put 'backup interface dialer 1' on my ethernet interface, however the ethernet wont go down when the sdsl line goes down.
Another method i tried was setting the default route going to internet with the ISDN link having an AD of 2 as shown below;-
ip route 0.0.0.0 0.0.0.0 BVI1
ip route 0.0.0.0 0.0.0.0 Dialer1 2
When i disconnected the line, the router wont go through the ISDN even after sometimes. If I remove the line 'ip route 0.0.0.0 0.0.0.0 BVI1' then the router goes through the ISDN link. Any way for me to make this automated.
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Sorry forgot to mention earlier, apparently the SDSL modem used is capable of routing and it is the router next hop before going to the ISP network. So basically the route will never get removed since the link between the router and the modem never goes down. So unless i unplug the ethernet cable between router and modem, the router primary route will still point to the modem.
The modem is provide by the broadband provider, so i have no control over it. Any other method apart from backup interface, floating static routes and dialer watch?
The modem is provide by the broadband provider, so i have no control over it. Any other method apart from backup interface, floating static routes and dialer watch?
Did you read my post?
Give the link a read, it is exactly what you need to do...
Give the link a read, it is exactly what you need to do...
http://www.cisco.com/en/US/products/sw/iosswrel/ps1826/products_feature_guide09186a0080080ebf.html