Double VLAN (DVLAN) Tunneling

DVLAN Tunneling allows the use of a second tag on network traffic. The additional tag helps differentiate between customers in the Metropolitan Area Networks (MAN) while preserving individual customer’s VLAN identification when they enter their own 802.1Q domain. With the introduction of this second tag, you do not need to divide the 4k VLAN ID space to send traffic on an Ethernet-based MAN.

With DVLAN Tunneling enabled, every frame that is transmitted from an interface has a new VLAN tag (S-tag) attached while every packet that is received from an interface has a VLAN tag (S-tag) removed (if one or more tags are present). DVLAN also supports up to 4 Tag Protocol Identifier (TPID) values per switch and the ability to map these values to ports. This allows you to configure the same or different TPIDs for different ports. Use the DVLAN Tunneling page to configure DVLAN frame tagging on one or more ports.

DVLAN Configuration

The DVLAN Config page allows you to configure the TPID with an associated Global EtherType for all ports on the system. To access the DVLAN Configuration page, click Switching > DVLAN > Configuration in the navigation menu.

DVLAN Configuration

DVLAN Configuration Fields

Field	Description
Configure Primary TPID	Select to configure the selected Primary tag protocol identifiers (TPIDs). If this option is not checked, you can configure secondary TPIDs.
Global EtherType	Specifies one of the following global EtherType options: 802.1Q Tag - Commonly used tag representing 0x8100 vMAN Tag - Commonly used tag representing 0x88A8 Custom Tag - Configure the tag for EtherType by providing a custom value in any range from 0 to 65535. The two-byte hex EtherType is used as the first 16 bits of the DVLAN tag.

Field

Description

Configure Primary TPID

Select to configure the selected Primary tag protocol identifiers (TPIDs). If this option is not checked, you can configure secondary TPIDs.

Global EtherType

Specifies one of the following global EtherType options:

802.1Q Tag - Commonly used tag representing 0x8100
vMAN Tag - Commonly used tag representing 0x88A8
Custom Tag - Configure the tag for EtherType by providing a custom value in any range from 0 to 65535.

The two-byte hex EtherType is used as the first 16 bits of the DVLAN tag.

If you make any changes to the page, click Submit to apply the changes to the system.

DVLAN Summary

The DVLAN Summary page allows you to view the Global and Default TPIDs configured for all ports on the system. To access the DVLAN Summary page, click Switching > DVLAN > Summary in the navigation menu.

DVLAN Summary

DVLAN Summary Fields

Field	Description
Primary TPIDs	Displays the Global tag protocol identifiers configured.
Secondary TPID	Displays the Default tag protocol identifiers configured.

Click Refresh to display the latest information from the router.

DVLAN Interface Configuration

The DVLAN Interface Configuration page allows you to view and configure the DVLAN interface configuration status for all ports on the system. To access the DVLAN Interface Configuration page, click Switching > DVLAN > Interface Configuration in the navigation menu.

DVLAN Interface Config

DVLAN Interface Configuration Fields

Field	Description
Interface	Select the physical interface for which you want to display or configure data. Select All to set the parameters for all ports to same values.
Interface Mode	This specifies the administrative mode for DVLAN Tagging: Enable: DVLAN Tagging is enabled for the specified port (or All ports). Disable: DVLAN Tagging is disabled for the specified port (or All ports), which is the default value.
Interface EtherType	The two-byte hex EtherType to be used as the first 16 bits of the DVLAN tag: 802.1Q Tag: Commonly used tag representing 0x8100 vMAN Tag: Commonly used tag representing 0x88A8 Custom Tag: Specify the value of the Custom Tag (range from 0 to 65535). This field is only visible when Custom Tag is selected.

Field

Description

Interface

Select the physical interface for which you want to display or configure data. Select All to set the parameters for all ports to same values.

Interface Mode

This specifies the administrative mode for DVLAN Tagging:

Enable: DVLAN Tagging is enabled for the specified port (or All ports).
Disable: DVLAN Tagging is disabled for the specified port (or All ports), which is the default value.

Interface EtherType

The two-byte hex EtherType to be used as the first 16 bits of the DVLAN tag:

802.1Q Tag: Commonly used tag representing 0x8100
vMAN Tag: Commonly used tag representing 0x88A8
Custom Tag: Specify the value of the Custom Tag (range from 0 to 65535). This field is only visible when Custom Tag is selected.

Click Refresh to redisplay the most current information from the router.

DVLAN Interface Summary

The DVLAN Interface Summary page displays the DVLAN interface configuration status for all ports on the system. To access the DVLAN Interface Summary page, click Switching > DVLAN > Interface Summary in the navigation menu.

DVLAN Interface Summary

Click Refresh to redisplay the most current information from the router.