xxss520@CHPC.BRC.UTEXAS.EDU ("L. Stuart Vance") (10/03/88)
>>The Mac associates itself with (potentially) a different network each >>time you fire up the chooser (it picks the network number associated with >>the last AppleTalk packet that it saw on it's Ethernet interface). > >No, no, no! This is NOT the way of doing it! Never run more than one >EtherTalk on one ethernet! If you have to, get bridges that can filter >specified protocols, and turn of EtherTalk (2 types!). Then get some >kind of EtherTalk router (A MacII with several ethernet interfaces and >some software) to connect the logical ethertalk networks. The mac >does not get it's network from any passing packets, but from >RTMP-packets, and normally it asks for it. Yes, yes, yes! I realize that this is not the way to do it. But, when you have 25 buildings connected to a campus-wide broadband network with Chipcom Ethermodems and LANBridge 100's (which do NOT support filtering based on packet type), you have no choice. I really do wish that LANBridges supported the kind of filtering we need, but it's doubtful that they ever will, and we cannot afford the expense of scrapping them in place of someone else's filtering bridge. We are handling some of the individual logical AppleTalk networks by using KIP/KStar, but that doesn't provide us a solution for people with (1) AlisaTalk, (2) Pacer's PCLink, (3) Kinetics KTalk, etc. Obviously, the ultimate solution is for Apple to devise a zone/network oriented security scheme, or find a way to password protect laserwriters. Until they do however, I reiterate, "Does anyone know how to hardwire AppleTalk network numbers into Macintosh Ethernet hardware/software?" L. Stuart Vance UT System Office of Telecommunication Services PS: I know about protocol type 809B. What's the other type?