VLAN Tagging

NOTE: A “VLAN tag” is also known as a “VLAN ID.” The terms are used interchangeably below.

Tagged and untagged virtual circuits

Tagged virtual circuit

A “tagged” virtual circuit is a virtual circuit with a VLAN ID greater than or equal to 1.

Because PacketFabric reserves tags 1-3, your virtual circuit VLAN IDs will be greater than or equal to 4 (our allowed VLAN ID range is 4-4094, inclusive).

Untagged virtual circuit

To create an untagged virtual circuit in the portal, you toggle the Make untagged option:

Animated gif of the untagged toggle

Tagging and building connections

In the PacketFabric network, EVPL virtual circuits follow these rules with regards to tagging:

  • Tagged-to-tagged circuit connections are always allowed.

  • Untagged-to-untagged circuit connections are never allowed.

  • Tagged-to-untagged circuit connections are usually allowed (see the note below).

  • You can only have one untagged circuit connection per port.

    NOTE: EFR devices do not allow untagged/tagged VLAN combinations.

    You can check whether a port is on an EFR or CFR device from the port Details page. The device name should start with efr or cfr:

    Screenshot of the port device information

allowed vcs

Managing VLAN tags/IDs

You can edit the VLAN ID by editing the virtual circuit.

Edit VC