3com 8807 Reference Guide

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 }

System view

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.

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.

# 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 ip-address

undo udp-helper server [ ip-address ]

VLAN interface view