Re: [foxboro] Mac Address
- From: "Warren Brown" <bigwrb21@xxxxxxxxxxx>
- To: foxboro@xxxxxxxxxxxxx
- Date: Fri, 10 May 2002 16:51:23 +0000
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
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>
>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
>
>
>
>
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