Go Premium for a chance to win a PS4. Enter to Win

  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 3282
  • Last Modified:

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

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.
1 Solution
NAT is listed as unsupported in the 3550 documentation:

And the NAT support matrix
Catalyst 3550   Not currently supported.

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

ljucasAuthor Commented:
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!

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now