I have a router with one serial and one isdn interface. I am getting connected to two differnet ISP's using these two interfaces. Once my leased line goes down I want to use my isdn backup for the other ISP. The following is the NAT config on my router.
int ethernet 0
ip nat inside
int serial 0
ip nat outside
int bri 0
ip nat outside
ip nat source list 5 int s0 overload
ip nat source list 5 int bri0 overload
the ip addresses on the serial and bri interface are assigned by my ISP when I establish a connection with my ISP.
The main concern is I want NAT'ng to happen when serial is up and bri is down and also when serial is down and bri is up.
Will the above configuration work , or do I need to have a different configuration. Please suggest.
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