Reference Guide

200 IP Addressing

• NetBIOS Name Server (port 137)

• NetBIOS Datagram Server (port 138)

• TACACS Server (port 49)

• Time Service (port 37)

Default Services

are not selected, check the text box and enter a

UDP port.

–

Destination IP Address

— Enter the IP address that receives the UDP

packet relays. If this field is 0.0.0.0, UDP packets are discarded. If this

field is 255.255.255.255, UDP packets are flooded to all IP interfaces.

Configuring UDP Relay Using the CLI Commands

The following table summarizes the CLI commands for setting fields

displayed in the UDP Relay pages.

The following is an example of the CLI commands:

Table 8-12. UDP Relay CLI Commands

CLI Command Description

ip helper-address {ip-

interface|all} address [udp-

port-list]

no ip helper-address {ip-

interface|all} address

Enables the forwarding of User

Datagram Protocol (UDP) broadcast

packets received on an interface to a

specific (helper) address.

Use the no form of this command to

disable the forwarding of broadcast

packets to a specific (helper) address.

console (config)# ip helper-address all 172.16.9.9 49 53

console (config)# do show ip helper-address

Interface Helper Address UDP Ports

----------- --------------- --------------------------

All 172.16.9.9 49,53