Specifications

Programmable Filtering

Local Area Transport (LAT)

The Local Area Transport (LAT) protocol is used exclusively by DEC for terminal access between DEC hosts and

terminal servers located on an Ethernet network.

This example is similar to the Internet Protocol example described previously.

The protocol type field value that is used for LAT frames is equal to 6004.

Filter all LAT

Therefore, to filter all LAT frames, the filter mask would be: 12-6004

Filter all but LAT

To filter all frames but LAT frames, the filter mask would be: ~(12-6004)