Yes IPX can use 802.3, but it can also use 802.2 and Ethertype_II. Netware 3.11 and lower defaults (but you can change this) to 802.3 and Netware 3.12 - 4.x defaults to 802.2. Netware 5 and up defaults to IP. If you MUST use IPX, then you should change your frame type to 802.2. If your not sure what frame type your novell servers are running, issue the "config" command from the server console. I've never heard of any problems with STP when filtering 802.3, as STP won't traverse a router, you should be ok there too. Are you trying to filter 802.3 on individual switch ports?
