ip forward-protocol udp

Description

Defines the UDP server to which the interface forwards ingress UDP broadcast packets received on a specific UDP port. A maximum of 8 UDP broadcast servers can be configured per interface.

The no form of this command removes traffic forwarding for the specified server and port/protocol.

Command context

config-if

Parameters

<IPV4-ADDR>

Specifies the UDP server IP address in IPv4 format (x.x.x.x), where x is a decimal number from 0 to 255. You can remove leading zeros. For example, the address 192.169.005.100 becomes 192.168.5.100.

When specifying an IPv4 address, you can remove leading zeros. For example, the address 192.169.005.100 becomes 192.168.5.100.

<PORT-NUM>

Specifies the UDP port number for which traffic is forwarded.

<PROTOCOL>

Specifies the protocol name for which traffic is forwarded. Supported protocols and their port numbers are:

• dns (53): Domain Name Service
• ntp (123): Network Time Protocol
• netbios-ns (137): NetBIOS Name Service
• netbios-dgm (138): NetBIOS Datagram Service
• radius (1812): Remote Authentication Dial-In User Service
• radius-old (1645): Remote Authentication Dial-In User Service
• rip (520): Routing Information Protocol
• snmp (161): Simple Network Management Protocol
• snmp-trap (162): Simple Network Management Protocol
• tftp (69): Trivial File Transfer Protocol
• timep (37): Time Protocol

Authority

Administrators

Examples

Forwarding DNS traffic to server 192.168.1.10 on interface 1/1/1:

switch(config)# interface 1/1/1
switch(config-if)# ip udp-bcast-forward protocol udp 192.168.1.10 dns

Forwarding DNS traffic (port 53) to server 192.168.1.10 on interface 1/1/1:

switch(config)# interface 1/1/1
switch(config-if)# ip udp-bcast-forward protocol udp 192.168.1.10 53