In addition, the MAC addresses are known by the LIs to aid in routing IA packets around the Site LAN Why would anyone want to fool around with this ? wrb >From: "Johnson, Alex (Foxboro)" <ajohnson@xxxxxxxxxxx> >Reply-To: foxboro@xxxxxxxxxxxxx >To: foxboro@xxxxxxxxxxxxx >Subject: Re: [foxboro] Mac Address >Date: Fri, 10 May 2002 09:23:01 -0400 >MIME-Version: 1.0 >Received: from [206.53.239.180] by hotmail.com (3.2) with ESMTP id >MHotMailBEA5151A00314004324ECE35EFB405C10; Fri, 10 May 2002 06:24:43 -0700 >Received: from turing.(none) (localhost [127.0.0.1])by turing.freelists.org >(FreeLists Mail Multiplex) with ESMTPid D22A394324; Fri, 10 May 2002 >08:22:51 -0500 (EST) >Received: with ECARTIS (v1.0.0; list foxboro); Fri, 10 May 2002 08:21:58 >-0500 (EST) >Received: from fox-nep25-xch.foxboro.com (foxboro-fw.invensyssystems.com >[65.204.211.10])by turing.freelists.org (FreeLists Mail Multiplex) with >ESMTP id C63C3942BFfor <foxboro@xxxxxxxxxxxxx>; Fri, 10 May 2002 08:21:57 >-0500 (EST) >Received: by fox-nep25-xch.foxboro.com with Internet Mail Service >(5.5.2655.55)id <KNC98JTT>; Fri, 10 May 2002 09:23:03 -0400 >From foxboro-bounce@xxxxxxxxxxxxx Fri, 10 May 2002 06:25:05 -0700 >Delivered-To: foxboro@xxxxxxxxxxxxx >Message-ID: <B850F4BD354D18409EB6F0A71D05203FB64D3F@ips-hso80-xch> >X-Mailer: Internet Mail Service (5.5.2655.55) >X-archive-position: 1405 >X-ecartis-version: Ecartis v1.0.0 >Sender: foxboro-bounce@xxxxxxxxxxxxx >Errors-To: foxboro-bounce@xxxxxxxxxxxxx >X-original-sender: ajohnson@xxxxxxxxxxx >Precedence: normal >X-list: foxboro > > >MAC addresses are the fundamental addressing mechanism in any Ethernet >based >LAN. > >Each Ethernet chip manufacturer is given a range of MAC addresses that they >may build into their E'net chips. > >MAC addresses are unique. In the entire world, no two chips are to have the >same MAC address. > > >In the I/A Series, we override the MAC of our FT stations so that each >station has the same address. SysDef ensures that no two stations in the >same control system have the same MAC address. > >Since the MAC addresses are the same both members of an FT pair get the >same >messages from other stations. This is required for FT to work. > >Hope this helps. > >Regards, > > >Alex Johnson >System Products - Invensys Systems, Inc. >10707 Haddington >Houston, TX 77043 >713.722.2859 (office) >713.722.2700 (switchboard) >713.932.0222 (fax) >ajohnson@xxxxxxxxxxx <mailto:ajohnson@xxxxxxxxxxx> >Come to the Invensys Showcase: http://www.invensysshowcase.com/ ><http://www.invensysshowcase.com/> > > > -----Original Message----- > From: Chetan_R_Jobanputra@xxxxxxx >[SMTP:Chetan_R_Jobanputra@xxxxxxx] > Sent: Friday, May 10, 2002 12:42 AM > To: foxboro@xxxxxxxxxxxxx > Subject: Re: [foxboro] Mac Address > > > > Not that much urgent. Not any problem . > > Regards, > > CRJ > > > > > Chetan_R_Jobanputra@xxxxxxx@freelists.org on 10/05/2002 11:01:16 > > Please respond to foxboro@xxxxxxxxxxxxx > > Sent by: foxboro-bounce@xxxxxxxxxxxxx > > > To: foxboro@xxxxxxxxxxxxx > cc: > Subject: [foxboro] Mac Address > > > > > > > Hello Friends, > > What is the significance of each digit of 12 digit MAC Address of IA > Modules?What this No. represents ? > > > > Regards, > > Chetan R J > RPL Refinery , > Jamnagar, India > > > > >_______________________________________________________________________ > This mailing list is neither sponsored nor endorsed by Invensys >Process > Systems (formerly The Foxboro Company). Use the info you obtain here >at > your own risks. Read >http://www.thecassandraproject.org/disclaimer.html > > foxboro mailing list: >//www.freelists.org/list/foxboro > to subscribe: >mailto:foxboro-request@xxxxxxxxxxxxx?subject=join > to unsubscribe: >mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave > > > > > > > >_______________________________________________________________________ > This mailing list is neither sponsored nor endorsed by Invensys >Process > Systems (formerly The Foxboro Company). Use the info you obtain here >at > your own risks. Read >http://www.thecassandraproject.org/disclaimer.html > > foxboro mailing list: >//www.freelists.org/list/foxboro > to subscribe: >mailto:foxboro-request@xxxxxxxxxxxxx?subject=join > to unsubscribe: >mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave > > > >_______________________________________________________________________ >This mailing list is neither sponsored nor endorsed by Invensys Process >Systems (formerly The Foxboro Company). Use the info you obtain here at >your own risks. Read http://www.thecassandraproject.org/disclaimer.html > >foxboro mailing list: //www.freelists.org/list/foxboro >to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join >to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave > _________________________________________________________________ Chat with friends online, try MSN Messenger: http://messenger.msn.com _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave