Re: Ethernet MACaddress constantly changing
I just installed another PCMCIA network adapter and now the MAC address
is stable so it was indeed the card.
Thanks to all who helped ;-)
Nico
>
> OK, I did some testing: rebooted from Linux to Windows and the other
> way around a couple of times and got the following peculiar results:
>
> 1. linux: 0:80:0:10:b7:7c
> 2. windows: 0:10:5a:92:b7:7c
> 3. linux: 80:0:0:10:85:bb
> 4. windows: 0:10:5a:92:b7:7c
> 5. linux: 2:0:0:10:2:16
> 6. windows: 0:10:5a:92:b7:7c
> 7. linux: 4:0:0:10:8:5b
> It seems to be a linux-only problem, windows is stable (at least something
> about Windows that's stable :-) ).
>
> ...wait a minute... turning of vmware ethernet bridge...
> 8. linux: 0:10:5a:92:b7:7c
> ...looks good... once more...
> 9. linux: 1:0:0:10:1:b
> ...damn...
> 10. linux: 0:10:5a:92:b7:7c
>
> I think it's not even Linux, it's probably the card itself :-(
> I should again get a bogus one...
>
> 11. linux: 1:0:0:10:1:b
> ...yep there it is again :-(
>
> OK never mind it seems to be something with the card itself :-(
>
>
> Nico
>
> > Hello James M.,
> >
> > On 12-Aug-99, you wrote:
> >
> > <snip>...
> >
> > LJM> MAC addr is another story.
> > LJM> That should be fixed to the adaptor and never change. (Well,
> > LJM> almost never. There are a few that have mac addresses that
> > LJM> are able to be modified with a special utility. The only ones
> > LJM> I know about are for older minicomputers...)
> > LJM>
> >
> > Likewise, I have encountered systems where the Eth Addr could be changed
> > but again, it was a long time ago and I think they were minis. I doubt
> > the 3Com NIC Eth could be changed.
> >
> > LJM>> I have a portable with a 3Com 3CCE589ET CPCMCIA network
> > LJM>> adapter. I'm also running arpwatch on my network to check for
> > LJM>> "ellegal aliens". I noticed that everytime a reboot my portable
> > LJM>> from linux to windows or the other way around I get a message
> > LJM>> from arpwatch that the Ethernet address of my portable changed.
> > LJM>> Shouldn't the ethernet address be network-card-specific. Is either
> > LJM>> Linux or Windows98 changing my Ethernet address and ifso why?
> > LJM>>
> >
> > Assuming arp on Debian is like other unixes I've used, go to another m/c
> > on your network and ping your laptop then arp -a it - this should
> > return the Eth. Do it before and after rebooting the L/T.
> >
> > Also, does arpwatch give you the addresses? Are the addresses
> > consistent - is the change always from addr A to addr B or does it
> > vary. For example, if you boot from Windoze to Debian and then back to
> > W, what addresses are reported by arpwatch and what do you get by
> > ping/arp -a at each step?
> >
> > Could this just be the NIC Eth going to null during the re-boot?
> >
> > Regards,
> >
> > LeeE
> > --
> >
> > http://www.spatial.freeserve.co.uk
> >
> >
> >
> >
> > --
> > Unsubscribe? mail -s unsubscribe debian-user-request@lists.debian.org < /dev/null
> >
>
>
> --
> --------------------------------------------------------
> How do you tell when you run out of invisible ink?
> --------------------------------------------------------
> Nico De Ranter
> Sony Service Center (SUPC-E/NSSE)
> Sint Stevens Woluwestraat 55 (Rue de Woluwe-Saint-Etienne)
> 1130 Brussel (Bruxelles), Belgium, Europe, Earth
> Telephone: +32 2 724 86 41 Telefax: +32 2 726 26 86
> e-mail: nico.deranter@sonycom.com
>
>
> --
> Unsubscribe? mail -s unsubscribe debian-user-request@lists.debian.org < /dev/null
>
--
--------------------------------------------------------
How do you tell when you run out of invisible ink?
--------------------------------------------------------
Nico De Ranter
Sony Service Center (SUPC-E/NSSE)
Sint Stevens Woluwestraat 55 (Rue de Woluwe-Saint-Etienne)
1130 Brussel (Bruxelles), Belgium, Europe, Earth
Telephone: +32 2 724 86 41 Telefax: +32 2 726 26 86
e-mail: nico.deranter@sonycom.com
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