3com 4500 26-PORT User Manual

C

HAPTER

 5: U

SING

 N

ETWORK

 P

ROTOCOL

 C

OMMANDS

System view

 Enter the ID of the UDP port with relay function to be enabled, in the range 

of 1 to 65535.

 Domain name service, corresponding to UDP port 53.

 NetBios datagram service, corresponding to UDP port 138. 

 NetBios name service, corresponding to UDP port 137. 

 TAC access control system, corresponding to UDP port 49. 

 Trivial file transfer protocol, corresponding to UDP port 69. 

 Time service, corresponding to UDP port 37.

Use the 

command to configure the UDP port with relay 

function.

Use the 

 command to delete the UDP port with relay 

function.

To configure the UDP port with relay function as the UDP port corresponding to 
DNS, enter the following:

<4500>system-view

System View: return to User View with Ctrl+Z.

[4500]udp-helper port dns

undo udp-helper server [ ip-address ]

VLAN Interface View

ip-address 

Enter the

IP address of the destination server.

Use the 

 command to configure the relay destination server.

Use the 

 command to delete the relay destination 

server.

By default, no relay destination server is configured.