Outer VLAN Classification

Feature Set N-ANL9

Napatech SmartNIC
Content Type
Feature Description
Capture Software Version

VLAN frames

The frame decoder recognizes an outer VLAN-tagged frame if the TPID (tag protocol identifier) is 0x8100, 0x88A8 or equal to an alternative TPID determined by the AltTPID parameter in the ntservice.ini file (see DN-0449).

A maximum of 3 VLANs are supported.

Note: VLAN tags are only recognized if they appear right after the layer 2 source MAC address.

VLAN length

The length of the VLAN field depends on the number of VLANs. The possible values are 0, 4, 8 and 12 bytes.