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class-maps and creating custom protocols

I'm currently building a set of configurations to implement QOS over a voip network. I've identified the voip signaling traffic which uses H323 fast start - TCP 1720 using an access-list which works fine. In order to keep the config as tight as possible I'd like to use a custom protocol to identify tcp port 1720 instead of an access-list. The command below indicates that you can create your own custom protocols to apply to the match statement. Does anyone know how you create these custom protocols?

(config-cmap)#match protocol ?

arp IP ARP

bgp Border Gateway Protocol

bridge Bridging

bstun Block Serial Tunnel

cdp Cisco Discovery Protocol

citrix Citrix Traffic

compressedtcp Compressed TCP

cuseeme CU-SeeMe desktop video conference

custom-01 Custom protocol custom-01

custom-02 Custom protocol custom-02

custom-03 Custom protocol custom-03

custom-04 Custom protocol custom-04

custom-05 Custom protocol custom-05

1 REPLY
Silver

Re: class-maps and creating custom protocols

In config mode,

ip cef

ip nbar port-map custom-01 tcp 1720

int fa0/0

ip nbar protocol-discovery

class-map test

match protocol custom-01

Hope this helps,

Partha

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