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New Member

NAT question

Hi,

We have 4 routers SR1& SR2 routers on one site and BR1& BR2 routers on other site.

HSRP is configured between SR1 & SR2 and also between BR1 &BR2.

SR1 (s0/0) is connected to BR1(s0/0) using serial link and also

SR2(s0/1) is connected to BR2(s0/1) using serial link

In SR1 router int f0/0.2 (192.168.2.0 network)interface we have defined "ip nat inside".

and there is host connected to BR1 router on int f0/0.7 (192.168.7.0 network)

If host on 192.168.7.0 wants to talk to 192.168.2.0 network where should I be using "ip nat outside"

Thanks

4 REPLIES
Gold

Re: NAT question

Hi there...

For SR1 the OUTSIDE interfavce would be its S0/0 Interface, as u know u gotta do the same NAT config on BR1, on BR1 u have the INSIDE (F0/0.7) and OUTSIDE (S0/0) as well.

Hope it Helps, Soroush.
New Member

Re: NAT question

Hi

I am only using "ip nat inside" on SR1 on (f0/0.2) and not on BR1 router on (F0/0.7).

Thanks

VIP Purple

Re: NAT question

Hello,

I assume you are translating 192.168.2.0 to 192.168.7.0 addresses ? The ip nat outside needs to be on the serial interfaces of both SR1 and SR2 (that is because you are using HSRP between SR1 and SR2).

Regards,

Georg

New Member

Re: NAT question

In this scenario, I suppose that if you use NAT from network 192.18.2.0 to 192.168.7.0, on SR1 router you configure "ip nat inside" on interface FE0/0.2 and "ip nat outside" on interface Ser0/0. Another important things is the default gateway. You cannot use the hsrp address but the physical address in both side (on SR1 and BR1).

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