mattsberry
Technical User
I have a Cisco 3721 router which has Serial Interface and an ADSL interface. I have 4 remote sites which connect to the 3721 via GRE Tunnels.
The 3721 is at the central site and uses the ADSL interface for Internet using a default route of 0.0.0.0 to a dialer. What I want to do is if the ADSL line goes down to use the Serial line as a backup for the Internet. The Serial line is used as the IP address for the VPN connections for remote sites. All remote sites VPN connect to the serial and the ADSL line is just for Internet at the central site.
The problem I have is I am using NAT and floating routes which dont seem to load because of the dialer is spoofing.
Can someone shed any light on how to do this or have I explained this really badly ?
Any help much appreciated.
The 3721 is at the central site and uses the ADSL interface for Internet using a default route of 0.0.0.0 to a dialer. What I want to do is if the ADSL line goes down to use the Serial line as a backup for the Internet. The Serial line is used as the IP address for the VPN connections for remote sites. All remote sites VPN connect to the serial and the ADSL line is just for Internet at the central site.
The problem I have is I am using NAT and floating routes which dont seem to load because of the dialer is spoofing.
Can someone shed any light on how to do this or have I explained this really badly ?
Any help much appreciated.
