Don't know how this got over to the Linux list but...here is definitive word from the "New Users Cookbook" (see below).
As you can see below, a single adapter CAN be used for both OS/2 TCP/IP and OS/2 SNA (you can select either DIX or 802.3 independently for the two protocols. You probably want DIX and 802.3, respectively, and these are the default settings.) ...so I think I can run the SE HTTPD server (tcpip) and OS/2 SNA at the same time on the same card....or am I mis-reading this.... Dave A single adapter can be used for any one of these purposes: LCS3172 (with MPTS 802.2 set to either DIX or IEEE802.3. You probably want DIX) LAN3172 (you probably want MPTS 802.2 set to 802.3, although some SNA systems can use DIX) (OS/2 and Windows NT (but not Windows 95) support SNA via DIX Frame Types). OS/2 TCP/IP (either DIX or IEEE802.3 The choice is made in the TCP/IP configurator ADVANCED OPTIONS second panel. The default is DIX.) OS/2 SNA (probably CM/2). (You could set MPTS 802.2 to either 802.3 or DIX; you probably would use 802.3.) LCS3172 and LAN3172 (You would need to set MPTS 802.2 to either DIX or 802.3, and this would apply to both protocols. Since you probably want DIX for LCS3172 and 802.3 for LAN3172, you are unlikely to want this combination.) LCS3172 and OS/2 SNA. (You would need to set MPTS 802.2 to either DIX or 802.3, and this would apply to both protocols. Since you probably want DIX for LCS3172 and 802.3 for SNA, you are unlikely to want this combination.) LAN3172 and OS/2 TCP/IP (in this case, MPTS 802.2 could be set to either 802.3 or DIX; you probably would want 802.3. OS/2 TCP/IP could, independently, be set to DIX or 802.3. You probably would want DIX. This can be a useful combined use.) LAN3172 and OS/2 SNA (in this case you could use either 802.3 or DIX for the 802.2 MPTS specification; you probably want 802.3. You would need to use a different SAP number for either VTAM or OS/2 SNA.) OS/2 TCP/IP and OS/2 SNA (you can select either DIX or 802.3 independently for the two protocols. You probably want DIX and 802.3, respectively, and this these are the default settings.) LCS3172 and LAN3172 and OS/2 SNA (You would need to set MPTS 802.2 to either DIX or 802.3, and this would apply to both LCS3172 and LAN3172. Since you probably want DIX for LCS3172 and 802.3 for SNA, you are unlikely to want this combination. If you do use it, you will need different SAP numbers for VTAM and OS/2 SNA.) LAN3172 and OS/2 TCP/IP and OS/2 SNA (the DIX or 802.3 frame chosen for MPTS 802.2 would apply to both LAN3172 and OS/2 SNA; you would probably select 802.3. The DIX or 802.3 selection for OS/2 TCP/IP is independent of MPTS; you would probably want DIX. You will need two different SAP numbers.) In words, the general rule is: (number of adapters) = (number of TCP/IP stacks) if, and only if, SNA and TCP/IP use the same frame format (DIX or 802.3), else SNA and TCP/IP will need separate adapters.
