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Conditional NAT pools for a Dialer Interface???

I have a customer who has a 1720 with wic1 connected Frame to Sprint Using Public address set 1, If that fails there is a 2nd wic with an ISDN bri connected to ISP 2, I can get the ISDN to failover the Frame connection using weighted statics to each ISP gateway BUT I don't know how to get the secondary NAT pool to kickin with the failover. I don't think seperate route maps with separate pools will work due to the source and destination IP addressing won't change, only the intermediate routing would.

  • Other Network Infrastructure Subjects
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Re: Conditional NAT pools for a Dialer Interface???

I had replied to this the other day but it looks like the forum didn't keep my message.

Anyway, I have done this before and the relavent config is below for what I did.

Make both the backup and primary interfaces outside nat interfaces.

ip nat pool backup 10.10.10.5 10.10.10.250 netmask 255.255.255.0

ip nat pool primary 10.10.11.5 10.10.11.250 netmask 255.255.255.0

ip nat inside source route-map primary pool primary

ip nat inside source route-map backup pool backup

access-list 1 permit any

route-map backup permit 10

match ip address 1

match interface BRI1/0

!

route-map primary permit 10

match ip address 1

match interface Serial0/1

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