VLAN Mapping

A backbone network can connect two Layer 2 user networks in the same VLAN. The two user networks must interoperate seamlessly in order to ensure Layer 2 connectivity between users and to uniformly deploy Layer 2 protocols. However, because the VLAN plans on the backbone and user networks differ, the backbone network cannot directly transmit VLAN packets from the user networks. Configure VLAN mapping to solve this issue. When VLAN packets from a user network enter the backbone network, a backbone network edge device changes the customer VLAN (C-VLAN) ID to the service VLAN (S-VLAN ID).

The device reverses the VLAN ID change after the packets have been transmitted. This ensures that the two user networks communicate seamlessly.

To configure a VLAN mapping, follow these steps:

Procedure

Step 1

Click VLAN Management > VLAN Translation > VLAN Mapping.

A table of previously defined VLAN mappings setting is displayed.

Step 2

Select one of the following mapping types:

  • One to One—Select this option to display and edit settings of the interface set to one-to-one VLAN mapping mode.

  • Tunnel Mapping—Select this option to display and edit settings of the interface set to Tunnel VLAN mapping mode.

Step 3

Click Add and enter the following fields:

  • Interface—Select the port.

  • Interface VLAN Mode—Displays the current interface mode.

  • Mapping Type—Select one of the following:

    • One to One—Select this option to define one-to-one VLAN mapping settings.

    • Tunnel Mapping—Select this option to define tunnel VLAN mapping settings.

  • One to One Translation—This option is available if you selected the one-to-one option in Mapping Type selection. Select one of the following:

    • Source VLAN—Configure the ID of the customer VLAN (C-VLAN) that will be translated to S-VLAN (translated VLAN).

    • Translated VLAN—Configure the S-VLAN that replaces the specified C-VLAN.

  • Tunnel Mapping—This option is available if you selected the Tunnel Mapping option in the Mapping Type selection. Select one of the following:

    • Customer VLAN—Select Default to define the required action for C-VLANs not specified or VLAN List to specifically define VLAN tunnel behavior for listed VLANs.

    • Tunneling—Select Drop or Outer VLAN ID . If Outer VLAN ID is selected, enter the VLANs.

Step 4

Click Apply. The parameters are written to the Running Configuration file.