Cisco 3640 Config NM-16sw Internal Lan Ethernet to Cable Router doing NAT

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Subject	Author	Date
Cisco 3640 Config NM-16sw Internal Lan Ethernet to Cable Router doing NAT	Chris	06-12-06

Posted by Chris on June 12, 2006, 7:30 pm

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I have always had my 3640 doing NAT. Now I want to let the ISP's
routers that I am connected to do it.

My internal network is 192.168.144.96/27 is my 3640 VLAN1

My external networks are:

192.168.1.0/29 ISP1 192.168.1.1 is a router doing nat or it can be
configured with Public IPs.

192.168.0.0/29 ISP2 192.168.0.1 is a modem doing nat or it can be
configured with Public IPs.

What I need to know is how do I get the VLAN traffic to the ISP's
routers without doing NAT on th 3640?

I have read a little on bridging and it seems like that may be what I
need, but I am not sure.

The reason I am doing this is because it is my understanding that NAT
is completely process switrched and with the current bandwidth that I
have available the 3640 can't process switch that many packets.

If I am in error and NAT does not have to be processed switched, I
would be interested in hearing any input on how to no process switch
NAT.

Thanks in advance for any help or advice.

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Cisco Systems Cisco 3640 Config NM-16sw Internal Lan Ethernet to Cable Router doing NAT