3Com SuperStack 4 Configuration Manual page 94

106 C 5: N
HAPTER ETWORK
Displaying and
Debugging UDP Helper
Configuration
P O
ROTOCOL PERATION
Note that:
You must first enable the UDP Helper function and then configure the UDP
■
port with the relay function. Otherwise, error information will appear.
The parameters
■
respectively refer to the six default ports. You can configure the default UDP
port in two ways: specifying port IDs and specifying the correct parameters.
For example, the
udp-helper port dns
The default UDP ports are not displayed when using the
■
current-configuration
function is disabled.
Configuring the Relay Destination Server for Broadcast Packet
You can configure up to 20 relay destination servers for a VLAN interface. If a
VLAN interface is configured with relay destination servers and UDP Helper
function is enabled on the VLAN interface, then the broadcast packets of a
designated UDP port received at the VLAN interface will be unicasted to the
destination server.
Perform the following configuration in VLAN Interface View.
Table 103 Configuring the Relay Destination Server for Broadcast Packet
Operation
Configure relay destination server for
broadcast packet
Delete relay destination server for
broadcast packet
Note that:
The
■
undo udp-helper server
desitnation servers configured on the interface.
By default, no relay destination server for UDP broadcast packets is configured.
■
After the above configuration, enter the
the running of the UDP Helper destination server, and to verify the effect of the
configuration. Enter the
configuration.
Table 104 Displaying and Debugging UDP Helper Configuration
Operation
Display the destination server
corresponding to VLAN
interface
Enable UDP Helper
debugging
Disable UDP Helper
debugging
dns, netbios-ds, netbios-ns, tacacs, tftp
udp-helper port 53
command in function.
command. But its ID is displayed after its relay
Command
udp-helper server
undo udp-helper server [
command (without any parameter) deletes all
display
command in User View to debug UDP Helper
debugging
Command
display udp-helper server [ interface
vlan-interface
debugging udp-helper { event | packet [ receive |
send ] }
undo debugging udp-helper { event | packet [
receive | send ] }
command is equivalent to the
display
ip_address
command in any view to display
]
vlan_id
and
time
]
ip_address