Overview
VLAN termination typically processes packets that include VLAN tags. A VLAN termination-enabled interface performs the following tasks when receiving a VLAN-tagged packet:
Assigns the packet to an interface according to its VLAN tags.
Removes the VLAN tags of the packet.
Delivers the packet to Layer 3 forwarding or other processing pipelines.
Before sending the packet, the VLAN termination-enabled interface determines whether to add new VLAN tags to the packet, based on the VLAN termination type.
VLAN termination can also process packets that do not include any VLAN tags.
This document uses the following VLAN tag concepts for a packet that has two or more layers of VLAN tags:
Layer 1 VLAN tag—Specifies the outermost layer of VLAN tags.
Layer 2 VLAN tag—Specifies the second outermost layer of VLAN tags.
The VLAN IDs of the packets are numbered in the same manner as the VLAN tags.