02-25-2004 10:49 PM - edited 03-02-2019 01:51 PM
Hi,
Customer using 2503 link to us via serial interface (frame-relay) and using isdn port as an backup. Customer do not have public ip, only one public ip at serial interface. They use nat from ethernet(inside) to serial(outside). Problem arise when they try to use isdn as backup, after dial to our RAS they still get real ip to isdn interface but they can not configure NAT to isdn interface. IOS allow to configure NAT to only one interface per an access-list. If access-list 1 is used for NAT to serial, they can not used it for NAT to BRI at same time, but they need it when serial go down for backup purpose. What should we do?
many thanks in advance,
Marit
04-12-2004 07:12 AM
Create 2 route-map statements one for serial and another one for BRI. Create an access-list and you can use match statement in route-map to link it with access-list. This will work fine. I think you should have 12.2 IOS to implemet this.
04-12-2004 01:19 PM
As the DDR is working fine.
Simply configure conditional NAT using route-maps.
I am assuming that you are using Serial0 for FR.
sample NAT config would look like this:
--------------------------xx----------------------
ip nat inside source route-map primary interface serial0 overload
ip nat inside source route-map backup interface bri0 overload
interface serial0
ip nat outside
interface bri0
ip nat outside
interface ethernet0
ip nat inside
route-map primary permit 10
match interface serial0
route-map backup permit 10
match interface bri0
---------------------xx---------------------------
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide