[vox-tech] different MAC address when using "ifconfig" and "arp"

[Bryan Richter]

2008/4/13, Hai Yi <yihai2004 at gmail.com>:
>
> Hello,
>
> I thought I can get my ether card's MAC address by using either
> "ifconfig eth0" command or "arp -v" command, but these commands
> returned different MAC address(00:16:E6:5C:DA:B8 vs
> 00:14:BF:D3:AE:29). Did I miss something here?
>
> I am using Ubuntu and the following are the results:
>
>
> hai at zodiac:~$ ifconfig eth0
> eth0      Link encap:Ethernet  HWaddr 00:16:E6:5C:DA:B8
>           inet addr:192.168.1.103  Bcast:192.168.1.255  Mask:255.255.255.0
>           inet6 addr: fe80::216:e6ff:fe5c:dab8/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:27120 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:26884 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:6831509 (6.5 MiB)  TX bytes:3820509 (3.6 MiB)
>           Interrupt:16
>
> hai at zodiac:~$ arp -v
> Address                  HWtype  HWaddress           Flags
> Mask            Iface
> .                        ether   00:14:BF:D3:AE:29   C
> eth0
> Entries: 1      Skipped: 0      Found: 1
>
>
> Thanks a lot!
> Hai



 I think arp shows your adapter's neighbors, not the adapter itself. I only
just read the man page for the first time, however, its results when I run
it seem to confirm that:

192.168.1.1              ether   00:18:4D:25:82:0D   C
ath0

My adapter's neighbor is, indeed, 192.168.1.1 (my router).

ifconfig, on the other hand, seems like a much better place to find info
about the device, itself. Also, the address it gives for my device matches
the sticker that the manufacturer put on my laptop. :)

-Bryan
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