fc156111@seas.gwu.edu (Timothy A. Waire Jr.) (12/07/90)
This is probably a stupid question, but here it goes... Do Macs connected to Ethernet have a physical address (not the number that AppleTalk assigns at StartUp) associated with them that can be monitored by and IBM running on Ethernet??? We are running EtherTalk 2.0. The IBMS are connected to Novell Servers. Thanks for any help! -- Timothy A. Waire, Jr. (Whitegold) Executive Office of the President INTERNET: fc156111@seas.gwu.edu Office of Management & Budget The George Washington University Washington, D.C. 20503 Electrical Engineering & Computer Science (202) 395-4922
bschmidt@bnr.ca (Ben Schmidt) (12/10/90)
In article <2415@sparko.gwu.edu> fc156111@seas.gwu.edu (Timothy A. Waire Jr.) writes: > Do Macs connected to Ethernet have a physical address (not the number that > AppleTalk assigns at StartUp) associated with them Yes. For example, Apple's Ethernet card manufactured by 3COM, each have a unique 12 hex digit physical Ethernet address beginning with 3COM's vendor code of 02608C (from memory, I think). > that can be monitored by and IBM running on Ethernet??? > > We are running EtherTalk 2.0. The IBMS are connected to Novell Servers. Well every 802.3 ethernet packet (e.g. EtherTalk 2.0) packet from the Mac will start out with its source Ethernet address set to the Mac's. If the IBM and the Mac can see each other at the Link layer (e.g. no routers between them), the packets that reach the IBM will still have the Mac's Ethernet source address. (If they do pass through a router, or a PC emulating a router, the Mac packet reaching your IBM will have the IBM-side-of-the-router's Ethernet address as it's source Ethernet address.) From there, it's up to the software running on the IBM, as to whether these Ethern et addresses are monitored. Ben Schmidt Bell-Northern Research, Ltd. Ph: (613) 763-3906 Information P.O. Box 3511, Station C FAX:(613) 763-3283 Technology Ottawa Canada K1Y 4H7 bschmidt@bnr.ca