Contents

VLAN termination commands· 1

second-dot1q· 1

vlan-termination broadcast enable· 2

vlan-termination broadcast ra· 3

 

VLAN termination commands

second-dot1q

Use second-dot1q to enable QinQ termination on an interface, and specify the Layer 2 VLAN IDs of the VLAN-tagged packets that can be terminated by the interface.

Use undo second-dot1q to disable QinQ termination on an interface.

Syntax

second-dot1q { vlan-id-list | any }

undo second-dot1q { vlan-id-list | any }

Default

QinQ termination is disabled on an interface.

Views

VLAN interface view

Predefined user roles

network-admin

Parameters

vlan-id-list: Specifies a space-separated list of up to 10 Layer 2 VLAN ID items. Each item specifies a Layer 2 VLAN ID or a range of Layer 2 VLAN IDs in the form of vlan-id1 to vlan-id2. The value range for VLAN IDs is 1 to 4094. The value for the vlan-id2 argument must be equal to or greater than the value for the vlan-id1 argument.

any: Specifies all values between 1 and 4094.

Usage guidelines

When you execute this command, the Layer 1 VLAN ID of VLAN-tagged packets that can be terminated by the interface is the interface number. This Layer 1 VLAN ID is not configurable.

Examples

# Configure VLAN-interface 10 to terminate VLAN-tagged packets with Layer 2 VLAN IDs in the range of 10 to 20.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] second-dot1q 10 to 20

[Sysname-Vlan-interface10] quit

# Configure VLAN-interface 12 to terminate VLAN-tagged packets with Layer 2 VLAN ID 100.

[Sysname] interface vlan-interface 12

[Sysname-Vlan-interface12] second-dot1q 100

[Sysname-Vlan-interface12] quit

# Configure VLAN-interface 100 to terminate VLAN-tagged packets with any Layer 2 VLAN IDs.

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] second-dot1q any

The following table describes the configuration results:

 

VLAN interface	Layer 1 VLAN ID of VLAN-tagged packets that the VLAN interface can terminate	Layer 2 VLAN IDs of VLAN-tagged packets that the VLAN interface can terminate
VLAN-interface 10	10	10–20
VLAN-interface 12	12	100
VLAN-interface 100	100	1–4094

 

vlan-termination broadcast enable

Use vlan-termination broadcast enable to enable an interface to transmit broadcasts and multicasts.

Use undo vlan-termination broadcast enable to disable an interface from transmitting broadcasts and multicasts.

Syntax

vlan-termination broadcast enable

undo vlan-termination broadcast enable

Default

An ambiguous QinQ termination-enabled interface drops broadcast and multicast packets.

Views

VLAN interface view

Predefined user roles

network-admin

Usage guidelines

	IMPORTANT: This command affects system performance. If system performance is seriously affected by this command, execute the undo form of this command to remove the command configuration.

 

.To transmit a broadcast or multicast packet, the interface starts a traversal over the VLAN IDs specified for ambiguous termination. It copies the packet and tags each copy with a VLAN ID, until all VLAN IDs in the specified range are traversed. For example, when ambiguous QinQ termination is configured, both layers of VLAN ID ranges are traversed.

Use this command when ambiguous QinQ termination is enabled on an interface.

Examples

Configure VLAN-interface 10 to tag a multicast or broadcast packet with two layers of VLAN IDs. The Layer 1 VLAN ID is 10. The Layer 2 VLAN ID is each VLAN ID in the range of 10 to 20.

# Configure VLAN-interface 10 to terminate VLAN-tagged packets with Layer 2 VLAN IDs in the range of 10 to 20.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] second-dot1q 10 to 20

# Enable VLAN-interface 10 to transmit broadcast and multicast packets.

[Sysname-Vlan-interface10] vlan-termination broadcast enable

vlan-termination broadcast ra

Use vlan-termination broadcast ra to enable an interface to transmit router advertisement (RA) multicast packets.

Use undo vlan-termination broadcast ra to disable an interface from transmitting RA multicast packets.

Syntax

vlan-termination broadcast ra

undo vlan-termination broadcast ra

Default

An ambiguous QinQ termination-enabled interface drops broadcast and multicast packets.

Views

VLAN interface view

Predefined user roles

network-admin

Usage guidelines

To transmit an RA multicast packet, the interface starts a traversal over the VLAN IDs specified for ambiguous termination. It copies the packet and tags each copy with a VLAN ID, until all VLAN IDs in the specified range are traversed. For example, when ambiguous QinQ termination is configured, both layers of VLAN ID ranges are traversed.

As a best practice, use this command to enable an ambiguous QinQ termination-enabled interface to transmit RA multicast packets on an IPv6 network. This command prohibits transmission of broadcast packets and other types of multicast packets, and consumes less CPU resources than the vlan-termination broadcast enable command.

Examples

Configure VLAN-interface 10 to tag RA multicast packets with two layers of VLAN IDs. The Layer 1 VLAN ID is 10. The Layer 2 VLAN ID is each VLAN ID in the range of 10 to 20.

# Configure VLAN-interface 10 to terminate VLAN-tagged packets with Layer 2 VLAN IDs in the range of 10 to 20.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] second-dot1q 10 to 20

# Enable VLAN-interface 10 to transmit RA multicast packets.

[Sysname-Vlan-interface10] vlan-termination broadcast ra