3com 8807 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 }
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.
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.
number is 138.
netbios-ns: Refers to netBIOS name service (netbios-ns), whose UDP port number
is 137.
is 137.
tacacs: Refers to terminal access controller access control system (TACACS),
whose UDP port number is 49.
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.
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