Configuring UDP protocols

About this task

Configure UDP protocols to determine which UDP broadcasts are forwarded.

Procedure

Enter either Global Configuration mode or VRF Router Configuration mode for a specific VRF context:

enable

configure terminal

Optional: router vrf WORD<1-16>
Configure a UDP protocol:

ip forward-protocol udp <1–65535> WORD<1–15>
Confirm your configuration:

show ip forward-protocol udp interface [vrf WORD<0-16>]|[vrfids WORD<0-512>] portfwd [vrf WORD<0-16>]| [vrfids WORD<0-512>] portfwdlist <1–1000>[vrf WORD<0-16>]|[vrfids WORD<0-512>] vrf WORD<0-16> vrfids WORD<0-512>

Example

Configure a UDP protocol and confirm your configuration.

Switch:1>enable
Switch:1#configure terminal
Switch:1(config)#ip forward-protocol udp 53 DNS
Switch:1(config)#show ip forward-protocol udp

================================================================================
                        Udp Protocol Tbl - GlobalRouter
================================================================================
UDP_PORT PROTOCOL_NAME
--------------------------------------------------------------------------------
37       Time Service
49       TACACS Service
53       DNS
69       TFTP
137      NetBIOS NameSrv
138      NetBIOS DataSrv

Variable definitions

Use the data in the following table to use the ip forward-protocol udp command.


Variable	Value
<1-65535> WORD<1-15>	Creates a new UDP protocol. <1-65535> WORD<1-15> is the UDP protocol name as a string. Use the no operator to delete a UDP protocol `no ip forward-protocol udp <1-65535>`.
portfwd	Displays portfwd information.
portfwdlist	Displays port forward list information.
vrf WORD<0-16>	Specifies the name of the VRF.
vrfids WORD<0-512>	Specifies the ID of the VRF.