3com 5500-SI Manual Do Utilizador

IP Performance Configuration 305

After the above configuration, enter the 

 command in any view to display the 

running of the UDP Helper destination server, and to verify the effect of the 
configuration. Enter the 

 command in User View to debug UDP Helper 

configuration.

The IP address of VLAN interface 2 on the Switch is 10.110.1.1, which is connected 
with network segment 10.110.0.0. Set to relay-forward the broadcast packets with 
destination IP of all 1s and destination UDP port 55 in the network segment 
10.110.0.0 to the destination server 202.38.1.2.

Figure 77   Networking for UDP Helper Configuration

1 Enable UDP Helper function.

[SW5500]udp-helper enable

2 Set to relay-forward the broadcast packets with destination UDP port 55. 

[SW5500]udp-helper port 55

3 Set the IP address of the destination server corresponding to VLAN interface 2 as 

202.38.1.2.

[SW5500]interface vlan 2

[SW5500-Vlan-interface2]udp-helper server 202.38.1.2

IP performance is described in the following section.

TCP attributes that can be configured include:

■

synwait timer: When sending the syn packets, TCP starts the synwait timer. If 
response packets are not received before synwait timeout, the TCP connection will 

Table 303   Displaying and Debugging UDP Helper Configuration

Display the destination server 
corresponding to VLAN interface

 [ interface 

 vlan_id ]

Enable UDP Helper debugging

 { event | packet [ receive | 

 ] }

Disable UDP Helper debugging 

 { event | packet [ 

 | send ] }

Ethernet

Ethernet

Internet

Sw itch ( UDP Helper )

10.110.0.0

Serv er

202.38.1.2

10.110.1.1

202.38.0.0

202.38.1.1