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CAN YOU NAT on a CISCO 3550 switch using a VLAN Interface?

Posted on 2003-12-05
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Last Modified: 2012-05-04
I am configuring a cisco 3550 switch with several vlans for my network. I would like to nat 1 of the fa ports to a different subnet since that port will host a connection to a trusted trading partner. Since that trading partner has the same subnet addressing scheme as I do, I need to nat to a different address group. I don't want to re-address my internal hosts so I am back to natting. Is this possible or do I have to insert a router in between?

My plan was to set up a vlan with and assign it to the interface that will be servicing the connection and then set up natting on that VLAN interface with several static nats.
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Question by:ljucas
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lrmoore earned 250 total points
ID: 9885860
NAT is listed as unsupported in the 3550 documentation:
http://www.cisco.com/en/US/products/hw/switches/ps646/products_configuration_guide_chapter09186a00801cdf37.html

And the NAT support matrix
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a008011c629.shtml
Catalyst 3550   Not currently supported.

Perhaps a firewall instead of a router? Little PIX 506e or something?

 
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by:ljucas
ID: 9886068
Thanks, that was what I was afraid the answer would be since the nat commands were not being accepted on the switch. Interesting that Cisco Level 3 support is telling me that it is supported, even after I pressed him to be sure.

Thanks for your insight!
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