C
HAPTER
44
| IP Interface Commands
IP Interface
– 1015 –
UDP HELPER
CONFIGURATION
User Datagram Protocol (UDP) Helper allows host applications to forward
UDP broadcast packets from this switch to another part of the network.
This section describes the commands used to configure UDP Helper.
ip forward-protocol
udp
This command specifies the UDP destination ports for which broadcast
traffic will be forwarded when the UDP helper is enabled. Use the no form
to remove a UDP port from the forwarding list.
SYNTAX
[no] ip forward-protocol udp destination-port
destination-port - UDP application port for which UDP service
requests are forwarded. (Range: 1-65535)
DEFAULT SETTING
The following UDP ports are inlcuded in the forwarding list when UDP
helper is enabled with the ip helper command, and a remote server
address is configured with the ip helper-address command:
BOOTP client port 67
BOOTP server port 68
Domain Name Service port 53
IEN-116 Name Service port 42
NetBIOS Datagram Server port 138
NetBIOS Name Server port 137
NTP port 37
TACACS service port 49
TFTP port 69
COMMAND MODE
Global Configuration
COMMAND USAGE
Up to 100 UDP ports can be specified with this command for forwarding to
one or more remote servers.
Table 138: UDP Helper Commands
Command Function Mode
ip forward-protocol udp Specifies the UDP destination ports for which
broadcast traffic will be forwarded
GC
ip helper Enables UDP helper globally on the switch GC
ip helper-address Specifies the servers to which designated UDP protocol
packets are forwarded
IC
show ip helper Displays configuration settings for UDP helper PE
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