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Re: How to get Mac address of ethernet port?

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Date Sun, 12 Jan 2014 08:40:01 +1100
Subject Re: How to get Mac address of ethernet port?
From Chris Angelico <rosuav@gmail.com>
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On Sun, Jan 12, 2014 at 3:29 AM, Roy Smith <roy@panix.com> wrote:
> If you don't believe that two machines can have the same MAC address,
> look up Hot Standby Router Protocol.  And if you don't believe a machine
> can ignore the BIA and assign a new MAC address in software, look up
> Decnet <insert derogatory gesture with sound effect here>.

Most people shouldn't have to worry about MAC address
duplication/collision on the same subnet (I used MACs as a means of
guaranteeing uniqueness among a pool of application servers, for
instance), but MAC switching in software can occur in a typical home
internet connection scenario. We had a connection set up a few years
ago where the ISP tech recorded the source MAC into the far end, and
only that MAC would work - so when I stuck in a different router, I
needed to switch it to the old MAC before it could establish a
connection. Stupid? Yes. Unusual? I hope so, but still more likely
than coming across DECnet in a typical home!

ChrisA

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Thread

How to get Mac address of ethernet port? Sam <lightaiyee@gmail.com> - 2014-01-11 06:26 -0800
  Re: How to get Mac address of ethernet port? Andriy Kornatskyy <andriy.kornatskyy@live.com> - 2014-01-11 16:35 +0200
    Re: How to get Mac address of ethernet port? "James Harris" <james.harris.1@gmail.com> - 2014-01-11 15:54 +0000
      Re: How to get Mac address of ethernet port? Roy Smith <roy@panix.com> - 2014-01-11 11:29 -0500
        Re: How to get Mac address of ethernet port? Chris Angelico <rosuav@gmail.com> - 2014-01-12 08:40 +1100
          Re: How to get Mac address of ethernet port? Roy Smith <roy@panix.com> - 2014-01-11 16:55 -0500
            Re: How to get Mac address of ethernet port? Chris Angelico <rosuav@gmail.com> - 2014-01-12 09:08 +1100
            Re: How to get Mac address of ethernet port? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-01-12 11:22 -0500
  Re: How to get Mac address of ethernet port? Chris Angelico <rosuav@gmail.com> - 2014-01-12 01:38 +1100
  Re: How to get Mac address of ethernet port? Chris Angelico <rosuav@gmail.com> - 2014-01-12 01:52 +1100
  Re: How to get Mac address of ethernet port? Skip Montanaro <skip@pobox.com> - 2014-01-11 09:03 -0600
  Re: How to get Mac address of ethernet port? Michael Torrie <torriem@gmail.com> - 2014-01-11 09:34 -0700
    Re: How to get Mac address of ethernet port? Sam <lightaiyee@gmail.com> - 2014-01-11 17:25 -0800
  Re: How to get Mac address of ethernet port? William Ray Wing <wrw@mac.com> - 2014-01-13 10:42 -0500
  Re: How to get Mac address of ethernet port? Chris Angelico <rosuav@gmail.com> - 2014-01-14 03:47 +1100

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