Cisco 300 Series Cli Manual page 720

Small business 300 series managed switches command line interface guide release 1.3

Table of Contents

ip-interface—Specifies the IP interface.

all—Specifies all IP interfaces.

address—Specifies the destination broadcast or host address to which to

forward UDP broadcast packets. A value of 0.0.0.0 specifies that UDP

broadcast packets are not forwarded to any host.

udp-port-list—Specifies the destination UDP port number to which to

forward Broadcast packets. (Range: 1–65535). This can be a list of port

numbers separated by spaces.

Default Configuration

Forwarding of UDP Broadcast packets received on an interface to a specific

(helper) address is disabled.

If udp-port-list is not specified, packets for the default services are forwarded to

the helper address.

Command Mode

Global Configuration mode

User Guidelines

To use this command, you must put the switch into routing mode using

This command forwards specific UDP Broadcast packets from one interface to

another, by specifying a UDP port number to which UDP broadcast packets with

that destination port number are forwarded. By default, if no UDP port number is

specified, the device forwards UDP broadcast packets for the following six

IEN-116 Name Service (port 42)

DNS (port 53)

NetBIOS Name Server (port 137)

NetBIOS Datagram Server (port 138)

TACACS Server (port 49)

Time Service (port 37)

Many helper addresses may be defined. However, the total number of

address-port pairs is limited to 128 for the device.

IP Addressing Commands

78-21075-01 Command Line Interface Reference Guide