NAT with 2 global interfaces

Unanswered Question
Jul 17th, 2006
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Hi all

recently i?ve purchased a 1801 for enable an isdn backup for my internet access via ADSL.

My first problem is that i need to use NAT to gain internet access from my network behind, but i don?t wnow how to proceed for enable it for ADSL and bri interfaces simultaneously because when the main ADSL interface goes down and bri comes up, i will need NAT too.

I?ve tried configuring the 2 static translations but only run the last configured and the first is ignored.

I can?t create a pool because my provider give?s me a dynamic ip address when the isdn link comes up

Any suggestion?

thank you very much


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desai.jaideep Mon, 07/17/2006 - 04:51
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You need to enable route map.

interface FastEthernet 0

ip nat inside

interface atm 0

ip nat outside

backup delay 1 1

backup interface Dialer 1

interface BRI 0

no ip address

dialer rotary-group 1

interface Dialer 1

ip nat outside

access-list 1 permit

dialer-list 1 protocol ip permit

ip nat inside source route-map interface 0 overload

ip nat inside source route-map Dialer interface Dialer 1 overload

route-map permit 10

match ip address 1

match interface 0

route-map Dialer permit 10

match ip address 1

match interface Dialer 1

ip route 0

ip route Dialer 1




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