Need IP NAT solution

[Totardo Tobing]

Hello Guys,

We have 1 unit of 2900 series router and 3 FE interfaces. One interfaces is used as sub-interface (We have 2 IP segment that used this router as their gateway) and other 2 ports as internet link connected to router's provider.

ISP give us 1 Public IP and another ISP give us 1 public address two.

The two internet links is used as active-standby link. 

Can you guide how ip nat configuration against this scenario please?

[Karsten Iwen · Accepted solution]

your dynamic PAT could look like the following. Just replace your interface-IDs and tune the NAT-ACL to you needs.

int gig0/1

  ip nat inside

!

int ser 1/0

  ip nat outside

int ser 1/1

  ip nat outside

!

ip nat inside source route-map NAT-ISP1 interface Serial1/0 overload

ip nat inside source route-map NAT-ISP2 interface Serial1/1 overload

!

ip access-list standard INSIDE

  permit 10.10.12.0 0.0.0.255

!

route-map NAT-ISP1 permit 10

  match ip address INSIDE

  match interface Serial1/0

!

route-map NAT-ISP2 permit 10

  match ip address INSIDE

  match interface Serial1/1

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