3com S7906E 설치 설명서

 

1-2 

Enter interface view 

interface interface-type 
interface-number 

— 

Specify the destination server 
to which UDP packets are to be 
forwarded 

udp-helper server ip-address 

Required 

No destination server is 
specified by default. 

 

z 

The UDP Helper enabled device cannot forward DHCP broadcast packets. That is to say, the UDP 

port number cannot be set to 67 or 68. 

z 

For the dns,  netbios-ds,  netbios-ns,  tacacs,  tftp, and time keywords, you can specify port 

numbers or the corresponding parameters. For example, udp-helper port 53 and udp-helper port 

dns specify the same UDP port number. 

z 

The configuration of all UDP ports is removed if you disable UDP Helper. 

z 

You can configure up to 256 UDP port numbers to enable the forwarding of packets with these 

UDP port numbers. 

z 

You can configure up to 20 destination servers on an interface. 

 

Displays the information of 
forwarded UDP packets 

display udp-helper server 
[ interface interface-type 
interface-number ] 

Available in any view 

Clear statistics about packets 
forwarded 

reset udp-helper packet 

Available in user view 

 

On Switch A, configure UDP helper to forward broadcast packets with UDP destination port number 55 

and destination IP address 255.255.255.255 or 10.110.255.255 to the destination server 10.2.1.1/16.