IP Routing Features

UDP Broadcast Forwarding

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<ip-address>: This can be either of the following:

The unicast address of a destination server on another subnet. For example: 15.75.10.43.

The broadcast address of the subnet on which a destination server operates. For example, the following address directs broadcasts to All hosts in the 15.75.11.0 subnet: 15.75.11.255.

Note: The subnet mask for a forwarded UDP packet is the same as the subnet mask for the VLAN (or subnet on a multinetted VLAN) on which the UDP broadcast packet was received from a client.

<udp-port-#>: Any UDP port number corresponding to a UDP application supported on a device at the specified unicast address or in the subnet at the specified broadcast address. For more information on UDP port numbers, refer to “TCP/UDP Port Number Ranges” on page 7-47.

<port-name>: Allows use of common names for certain well- known UDP port numbers. You can type in the specific name instead of having to recall the corresponding number:

dns: Domain Name Service (53)

ntp: Network Time Protocol (123)

netbios-ns:NetBIOS Name Service (137)

netbios-dgm:NetBIOS Datagram Service (138)

radius: Remote Authentication Dial-In User Service (1812)

radius-old:Remote Authentication Dial-In User Service (1645)

rip: Routing Information Protocol (520)

snmp: Simple Network Management Protocol (161)

snmp-trap:Simple Network Management Protocol (162)

tftp: Trivial File Transfer Protocol (69)

timep: Time Protocol (37)

For example, the following command configures the routing switch to forward UDP broadcasts from a client on VLAN 1 for a time protocol server:

ProCurve(config)# ip forward-protocol udp 15.75.11.155 timep

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