Used in a VLAN context to configure or remove a server or broadcast address and
its associated UDP port number. You can configure a maximum of 16
forward-protocol udp assignments in a given VLAN. The switch allows a total
of 256 forward-protocol udp assignments across all VLANs.
You can configure UDP broadcast forwarding addresses regardless of whether UDP
broadcast forwarding is globally enabled on the switch. However, the feature does
not operate unless globally enabled.
This can be either of the following:<ip-address>
• 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.
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
<udp-port-#>
address. For more information on UDP port numbers, see “TCP/UDP port number
ranges” (page 79).
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:
<port-name>
dns Domain name service (53)
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)
Example:
The following command configures the routing switch to forward UDP broadcasts from a client on
VLAN 1 for a time protocol server:
HP Switch(vlan-1)# ip forward-protocol udp 15.75.11.155 timep
Viewing the current IP forward-protocol configuration
Syntax:
show ip forward-protocol [vlan <vid>]
Displays the current status of UDP broadcast forwarding and lists the UDP forwarding
addresses configured on all static VLANS in the switch or on a specific VLAN.
Example 42 shows the global display showing UDP broadcast forwarding status and configured
forwarding addresses for inbound UDP broadcast traffic for all VLANs configured on the routing
switch.
78 IP Routing Features
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