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Operation Manual – UDP-Helper
Quidway S5600 Series Ethernet Switches-Release 1510
Chapter 1
UDP-Helper Configuration
Huawei Technologies Proprietary
1-2
1.2 Configuring UDP-Helper
Table 1-2
Configure UDP-Helper
Operation
Command
Description
Enter system view
system-view
—
Enable UDP-Helper
udp-helper enable
Required
UDP-Helper is disabled
by default
Specify a UDP port that
broadcasts UDP packets
udp-helper port
{
port-number
|
dns
|
netbios-ds
|
netbios-ns
|
tacacs
|
tftp
|
time
}
If the port is a default
UDP port, you do not
need to configure it;
otherwise you need to
configure the port as
required.
With UDP-Helper
enabled, the six ports with
port number 53, 138, 137,
49, 69, and 37 are
enabled to broadcast
UDP packets
Enter VLAN interface view
interface vlan-interface
vlan-id
—
Configure the destination
server to which the UDP
packets are to be
forwarded
udp-helper server
ip-address
Required
By default, no destination
server is configured
Caution:
z
You need to enable the UDP-Helper function before specifying a UDP-Helper
destination port.
z
The
dns
,
netbios-ds
,
netbios-ns
,
tacacs
,
tftp
, and
time
keywords refers to the
six default UDP ports. You can configure a default port to be a UDP-Helper
destination port by specifying the corresponding port number or the corresponding
keyword. For example,
udp-helper port
53 and
udp-helper port
dns
specify the
same port.
z
The
display current-configuration
command does not display the default UDP
ports that are configured to be UDP-Helper destination ports.
z
After UDP-Helper is disabled, all the configured UDP ports are cancelled,
including the default ports.
z
You can configure up to 40 UDP ports as UDP-Helper destination ports on a
device.