Assigning a trunk port to a VLAN
A trunk port can carry multiple VLANs. You can assign it to a VLAN in interface view (including Ethernet
interface view, Layer 2 aggregate interface view) or port group view.
Follow these steps to assign a trunk port to one or multiple VLANs:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enter Ethernet
interface view
interface
interface-type
interface-number
Enter Layer 2
aggregate
interface view
interface bridge-aggregation
interface-number
Enter interface
view (including
Ethernet
interface view,
Layer 2
aggregate
interface view)
or port group
view
Enter port
group view
port-group manual
port-group-name
Required
Use either command.
•
In Ethernet interface view, the
subsequent configurations apply
to the current port.
•
In port group view, the
subsequent configurations apply
to all ports in the port group.
•
In Layer 2 aggregate interface
view, the subsequent
configurations apply to the Layer
2 aggregate interface and all its
member ports.
Configure the link type of the port
or ports as trunk
port link-type
trunk
Required
Assign the trunk port(s) to the
specified VLAN(s)
port trunk permit vlan
{
vlan-id-list
|
all
}
Required
By default, a trunk port carries only
VLAN 1.
Configure the PVID of the trunk
port(s)
port trunk pvid vlan
vlan-id
Optional
VLAN 1 is the PVID by default.
NOTE:
•
To change the link type of a port from trunk to hybrid or vice versa, you must set the link type to access
first.
•
After configuring the PVID for a trunk port, you must use the
port trunk permit vlan
command to
configure the trunk port to allow packets from the PVID to pass through, so that the egress port can
forward packets from the PVID.
•
After you use the
port link-type
{
access
|
hybrid
|
trunk
} command to change the link type of an
interface, the loopback detection action configured on the interface by using the
loopback-detection
action
command will be restored to the default. For more information about the
loopback-detection
action
command, see the
Layer 2—LAN Switching Command Reference.
•
After you configure a command on a Layer 2 aggregate interface, the system starts applying the
configuration to the aggregate interface and its aggregation member ports. If the system fails to do that
on the aggregate interface, it stops applying the configuration to the aggregation member ports. If it
fails to do that on an aggregation member port, it skips the port and moves to the next port.
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