1-7
To do… Use the command… Remarks
Enter system view System-view —
Enter Ethernet port view interface interface-type
interface-number —
Set the link type for the port as
trunk port link-type trunk Required
Set the default VLAN ID for the
trunk port port trunk pvid vlan vlan-id Optional
By default, the VLAN of a
trunk port is VLAN 1.
Add the current trunk port into
the specified VLAN port trunk permit vlan { vlan-id-list |
all } Optional
Disabling Up/Down Log Output on a Port
An Ethernet port has two physical link statuses: UP and Down. When the link status of an Ethernet port
changes, the device sends log information to the log server, which then acts accordingly. If the status of
Ethernet ports changes frequently, the device sends log information to the log server frequently,
burdening the log server and consuming plenty of network resources.
To solve this problem, you can disable the Up/Down log output function on some ports, so as to reduce
the quantity of log information output to the log server.
After you allow a port to output the Up/Down log information, if the physical link status of the port does
not change, the device does not send log information to the log server but monitors the port in real time.

Configuration tasks

Follow these steps to disable a port from outputting UP/Down log information:
To do… Use the command… Remarks
Enter system view system-view —
Enter Ethernet port view interface interface-type
interface-number —
Disable a port from outputting
UP/Down Log Information undo enable log updown
Required
By default, a port is allowed to
output the UP/Down log
information.

Configuration example

# By default, port GigabitEthernet 1/0/1 is allowed to output the Up/Down log information. Execute the
shutdown command or the undo shutdown command on GigabitEthernet 1/0/1, and the system
outputs Up/Down log information of GigabitEthernet 1/0/1.