3Com Switch 8800 Family Command Reference Guide

UDP Helper Configuration Commands 897
udp-helper port Syntax
udp-helper port { port | dns | netbios-ds | netbios-ns | tacacs | tftp | time }
undo udp-helper port { port | dns | netbios-ds | netbios-ns | tacacs | tftp |
time }
View
System view
Parameter
port: Number of the port whose UDP packets are to be forwarded, in the range 1
to 65,535. Up to 250 ports are supported besides the default ports. Port 67 and
port 68 are the ports of known protocols, so they cannot be specifies as UDP
ports.
dns: Refers to domain name system (DNS), whose UDP port number is 53.
netbios-ds: Refers to netBIOS datagram service (netbios-ds), whose UDP port
number is 138.
netbios-ns: Refers to netBIOS name service (netbios-ns), whose UDP port number
is 137.
tacacs: Refers to terminal access controller access control system (TACACS),
whose UDP port number is 49.
tftp: Refers to trivial transfer protocol (TFTP), whose UDP port number is 69.
time: Refers to time service, whose UDP port number is 37.
Description
Use the udp-helper port command to specify the port whose UDP packets are to
be forwarded.
Use the undo udp-helper port command to remove the configuration.
Example
# Specify the port corresponding to the DNS protocol as an UDP port.
<SW8800>system-view
System View: return to User View with Ctrl+Z.
[SW8800] udp-helper port dns
udp-helper server Syntax
udp-helper server ip-address
undo udp-helper server [ ip-address ]
View
VLAN interface view