Intermec WA21 System Manual page 139

Chapter 5 — Configuring the Spanning Tree
For this example, set these options on the Ethernet Frame Type Filters
screen.
In the Predefined Subtype Filters screen, set the 802.2-IPX-RIP field to
drop 802.2, DIX, and 802.3 frames.
MobileLAN access WA2X System Manual 125