vlan precedence

Function

The vlan precedence command configures the device to preferentially use a VLAN assignment mode when both MAC address-based and IP subnet-based VLAN assignment modes are matched.

The undo vlan precedence command restores the default VLAN assignment mode on an interface when both MAC address-based and IP subnet-based VLAN assignment modes are matched.

By default, MAC address-based VLAN assignment takes precedence over IP subnet-based VLAN assignment.

Only the S5720-EI, S5720I-SI, S5720S-SI, S5720-SI, S5735-S, S5735S-S, S5735-S-I, S5730S-EI, S5730-SI, S6720-EI, S6720-LI, S6720S-EI, S6720S-LI, S6720S-SI, and S6720-SI support this command.

Format

vlan precedence { ip-subnet-vlan | mac-vlan }

undo vlan precedence

Parameters

Parameter	Description	Value
ip-subnet-vlan	Indicates that IP subnet-based VLAN assignment takes precedence over MAC address-based VLAN assignment.	-
mac-vlan	Indicates that MAC address-based VLAN assignment takes precedence over IP subnet-based VLAN assignment.	-

Views

system view, Ethernet interface view, GE interface view, XGE interface view, 40GE interface view, Eth-Trunk interface view, MultiGE interface view, port group view

S5720I-SI, S5720S-SI, S5720-SI, S5735-S, S5735S-S, S5735-S-I, S5730S-EI, S5730-SI, S6720-LI, S6720S-LI, S6720S-SI, and S6720-SI supports the vlan precedence command only in the system view. Other switches support the vlan precedence command only in the interface view.

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

You can configure all the VLAN assignment methods simultaneously on the switch. By default, the priority order of VLAN assignment methods is: policy-based VLAN > MAC address-based > IP subnet-based > protocol-based > port-based.

The vlan precedence command changes the priority order of MAC address-based VLAN assignment and IP subnet-based VLAN assignment. For example, the vlan precedence ip-subnet-vlan command makes IP subnet-based VLAN assignment take precedence over MAC address-based VLAN assignment.

Currently, port-based VLAN assignment is used most widely.

Precautions

This command does not change the priority order of the other VLAN assignment methods.

Packets may be transmitted in a different VLAN after the priority order of MAC address-based VLAN assignment and IP subnet-based VLAN assignment changes. This may cause a traffic forwarding failure in the VLAN.

When the command is used on the S5720I-SI, S5720S-SI, S5720-SI, S5735-S, S5735S-S, S5735-S-I, S5730S-EI, S5730-SI, S6720S-SI, and S6720-SI to adjust the priority, the command is valid for MAC-VLAN entries with the mask and without the mask. The command is valid for only MAC-VLAN entries without the mask on other models.

If you run the vlan precedence command multiple times in the same interface view, only the latest configuration takes effect.

Example

# Specify that IP subnet-based VLAN assignment takes precedence over MAC address-based VLAN assignment.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] vlan precedence ip-subnet-vlan