VLAN
The VLAN layer adds an IEEE 802.1Q tag to frames encapsulated by a Library → Network Tunnels profile. Use it when the DUT expects tagged traffic on access/trunk ports or when a VLAN must be part of the outer stack together with GRE, VXLAN, or IPsec.
Table — VLAN Layer Parameters
| Name | Description | Value |
|---|---|---|
| VLAN ID | VLAN identifier | 1–4094 |
| PCP | Priority Code Point (802.1p) | 0–7 |
| DEI | Drop Eligible Indicator | 0 or 1 |
| TPID | Tag Protocol Identifier | Usually 0x8100; often 0x88a8 for an outer Q-in-Q tag |
In a stack containing multiple VLAN layers, or a VLAN and other tunnels, check the layer order in the library object: the outer tag must match the DUT's expectations. A VLAN in a tunnel profile does not replace Outer/Inner VLAN in Access Groups; these are separate mechanisms.