Problems arising

The current configuration is shown in the following figure:

[SW1]int g0/0/1
[SW1-GigabitEthernet0/0/1]
[SW1-GigabitEthernet0/0/1]dis this
#
interface GigabitEthernet0/0/1
 port link-type trunk
 undo port trunk allow-pass vlan 1
 port trunk allow-pass vlan 2 to 4094
#
return

When the port link type needs to be modified or deleted, an error is reported   Error: please update the default configuration

[SW1-GigabitEthernet0/0/1]
[SW1-GigabitEthernet0/0/1]port link-type access 
Error: Please renew the default configurations.
[SW1-GigabitEthernet0/0/1]
[SW1-GigabitEthernet0/0/1]undo port link-type 
Error: Please renew the default configurations.

Causes of occurrence

The reason for the error is that you have added the port to a VLAN, so you will report an error when changing or deleting it.

For example, if you want to delete “parent folder”, you have to delete “child folder” first. It means to delete it layer by layer. The same is true of Huawei’s configuration commands, which are undo level by level.

|--Parent Folder
|---- subfolder

Solution

To undo all commands except “port link type trunk”, you can change the link type or undo the command.

[SW1-GigabitEthernet0/0/1]dis this
#
interface GigabitEthernet0/0/1
 port link-type trunk
 undo port trunk allow-pass vlan 1
#
return
[SW1-GigabitEthernet0/0/1]
[SW1-GigabitEthernet0/0/1]undo port trunk allow-pass vlan all
[SW1-GigabitEthernet0/0/1]
[SW1-GigabitEthernet0/0/1]port trunk allow-pass vlan 1
[SW1-GigabitEthernet0/0/1]
[SW1-GigabitEthernet0/0/1]dis this
#
interface GigabitEthernet0/0/1
 port link-type trunk
#
return
[SW1-GigabitEthernet0/0/1]
[SW1-GigabitEthernet0/0/1]undo port link-type 
[SW1-GigabitEthernet0/0/1]
[SW1-GigabitEthernet0/0/1]dis this
#
interface GigabitEthernet0/0/1
#
return