Hash Key Type 7: All VLAN IDs

Napatech Link™ Software Features
Platform
Napatech SmartNIC
Content Type
Feature Description
Capture Software Version
Link™ Capture Software 12.0

Hash key data

The hash key data for hash key type 7 is the contents of the 12-bit VLAN ID fields of all the VLAN tags in the frame.

Hash key data word 0 includes the contents of the VLAN ID field of the first VLAN tag. Hash key data word 1 includes the contents of the VLAN ID field of the second VLAN tag and so on. Like in the frame decoding process, a maximum of 3 VLAN tags are supported. Hash key data words that are not used are all zeros for hash key type 7.

Illustration

This figure illustrates hash key type 7.


Hash key based on all VLAN IDs Type / length = 8100 VLAN tags 0 12 - bit VID ( 0 ) U ser priority & CFI 20 - bit all zero 12 - bit VID ( 0 ) Type / length = 8100 12 - bit VID ( 1 ) U ser priority & CFI Type / length = 8100 12 - bit VID ( 2 ) U ser priority & CFI 1 20 - bit all zero 12 - bit VID ( 1 ) 2 20 - bit all zero 12 - bit VID ( 2 ) Hash key data word

Validity

Hash key type 7 is valid for frames containing at least one VLAN tag.