Nat question on Cisco Routers

Hi Smurf,
Hope It will clear you how the MAC is involved in NAT Process.

How are ARPs handled for IP addresses generated by NAT?
A. Cisco IOS NAT will generate an ARP entry for IP addresses created by the NAT that point to the MAC address of the interface the NAT IP address pool is associated with.

For example, when performing inside source translation, if the inside global address pool is associated to the subnet of an outside interface (S0, for example) then ARP entries for these IP addresses will use the MAC address of S0.

www.cisco.com/warp/public/556/nat-faq.html

Also please have a look into this site...it explains how NAT is working.

www.cisco.com/warp/public/556/nat.swf

Hi Smurf,

While reading my CCNA book I crossed the following topic. I googled the same and I found the below link reg MAC handling



www.cisco.com/warp/public/105/5.html

Hi Dove,

I think we have gone off on a tangent here. Proxy ARP is different to what we were discussing here, isn't it ?

Take it easy

Wayne

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Hi Smurf,

I found this below link while google....It explain step by step how the IP address was traslated in NAT process....

Now I got some more idea about the NAT.......Thanks to open up this topic...

URL
www.cisco.com/en/US/tech/tk648/tk361/tec...186a0080133ddd.shtml