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kvc
Community Member

Problem with NAT to two differnt ISP's

Hi,

I have a router with a serial and an isdn port.

Both the ports are connected to two differnt isp's.

I have to implement NAT in both the cases. I am using ISDN as a backup to my serial link. So i want a particular set of nat to happen when serial is down and another set when when it is up.

the following is the config which i wanted.

int s0

ip address 200.1.1.2 255.255.255.248

ip nat outside

int bri0

ip address negotiated

ip nat outside

int e0

ip nat inside

ip nat inside source list 5 interface serial0 overlo

ip nat inside source list 6 interfade bri0 overload

access-list 5 permit any

access-list 6 permit any

But when i use the above statements eventhough my serial0 is down the router is still using the first nat statements only, and i am unable to access net.

Please suggest what changes should i make or is there any other alternative

Thanks in advance

2 REPLIES
Community Member

Re: Problem with NAT to two differnt ISP's

Community Member

Re: Problem with NAT to two differnt ISP's

you can try this:

ip nat inside source list 6 interface serial0 overlo

ip nat inside source list 5 interfade bri0 overload

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