Maximum UDP port forward

fakrul · ‎04-27-2008

I have a Cisco 2801 router with C2801-IPBASE-M IOS. I have already done a lot of port forward. Now if I want to add more udp port forward it give the following error:

Maximum UDP forwarding ports in use

Is there any limitation of UDP port forward? Can it be maximized by changing the router or ios?

jcoke · ‎04-27-2008

Nat limitations are usually limited to the available memory in the router. Either that or you're trying to allocate more ports than exist on a given address.

fakrul · ‎04-27-2008

I am not doing any nat there. We are providing a service for a software which need to be port forward. For each connectivity we need to forward 3 udp port with specific ip helper-address. Now the router is denying to add new portforward.

Harold Ritter · ‎04-27-2008

Fakrul,

There is indeed a hard limit of 200 ports you can configure for UDP flooding.

Regards,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
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