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

["Bryan Richter" <bryan.richter@gMAPSmail.com>]

2008/4/13, Hai Yi <yihai2004@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@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@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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