How to change the link type of an interface

Publication Date:  2016-11-24 Views:  4861 Downloads:  0
Issue Description
How to change the link type of an interface
Solution
The link type of an interface can be access, trunk, hybrid, or Dot1q-tunnel. The methods used to change the link type of an interface in different versions are different.
In V200R005 and later versions, run the port link-type { access | trunk | hybrid | dot1q-tunnel } command and enter y or n as prompted. When the interface uses the default VLAN configuration, the system does not display any message. The link type of the interface is changed directly.
When you enter y and press Enter, the device automatically deletes the non-default VLAN configuration of the interface and sets the link type of the interface to the specified one.
When you enter n and press Enter, the device retains the current link type and VLAN configuration of the interface.
Change the link type of the interface to hybrid.
<HUAWEI> system-view
[HUAWEI] interface GigabitEthernet0/0/1
[HUAWEI-GigabitEthernet0/0/1] port link-type hybrid
Warning: This command will delete VLANs on this port. Continue?[Y/N]:y
Info: This operation may take a few seconds. Please wait for a moment...done. In earlier versions of V200R005, an interface joins VLAN 1 by default, and the PVID of an interface is VLAN 1. You can run the port link-type { access | trunk | hybrid | dot1q-tunnel } command to change the link type of the interface.
Change the link type of the interface to access.

<HUAWEI> system-view
[HUAWEI] interface GigabitEthernet0/0/1
[HUAWEI-GigabitEthernet0/0/1] port link-type access
[HUAWEI-GigabitEthernet0/0/1] port default vlan 10
Change the link type of the interface to trunk.

<HUAWEI> system-view
[HUAWEI] interface GigabitEthernet0/0/1
[HUAWEI-GigabitEthernet0/0/1] port link-type trunk
[HUAWEI-GigabitEthernet0/0/1] port trunk pvid vlan 10
[HUAWEI-GigabitEthernet0/0/1] port trunk allow-pass vlan 2 10 20
Change the link type of the interface to hybrid.

<HUAWEI> system-view
[HUAWEI] interface GigabitEthernet0/0/1
[HUAWEI-GigabitEthernet0/0/1] port link-type hybrid
[HUAWEI-GigabitEthernet0/0/1] port hybrid pvid vlan 10
[HUAWEI-GigabitEthernet0/0/1] port hybrid untagged vlan 2 10
[HUAWEI-GigabitEthernet0/0/1] port hybrid tagged vlan 20
Change the link type of the interface to Dot1q-tunnel.

<HUAWEI> system-view
[HUAWEI] interface GigabitEthernet0/0/1
[HUAWEI-GigabitEthernet0/0/1] port link-type dot1q-tunnel
[HUAWEI-GigabitEthernet0/0/1] port default vlan 10
When you change the link type of an interface that does not use the default VLAN configuration, the system displays the message "Error: Please renew the default configurations."

You need to restore the default configuration of the interface, and then change the link type of the interface.

Restore the default VLAN configuration of an access or Dot1q-tunnel interface.
<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo port default vlan
Restore the default VLAN configuration of a trunk interface.
<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo port trunk pvid vlan
[HUAWEI-GigabitEthernet0/0/1] undo port trunk allow-pass vlan all
[HUAWEI-GigabitEthernet0/0/1] port trunk allow-pass vlan 1
Restore the default configuration of a hybrid interface.
<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo port hybrid pvid vlan
[HUAWEI-GigabitEthernet0/0/1] undo port hybrid vlan all
[HUAWEI-GigabitEthernet0/0/1] port hybrid untagged vlan 1

END