The router is going to have more than one MAC. The published one is probably for the WAN interface, which is useful to know if your provider is doing MAC locking.
That's my WAG. On Sun, 13 Apr 2008 16:36:37 -0400, Hai Yi wrote: > Thank you, Bryan: > > I think you are pretty much correct: it looks like this "arp" > command is equivalent to another command "ip neighbor", which > pretty much speaks for itself. However, I checked the MAC on my > router, it appears to be 00:14:BF:D3:AE:2A, which is one digit > greater in the last section than the one from arp command. > (00:14:BF:D3:AE:29 ) Why is that? > > Thanks, > Hai > > On Sun, Apr 13, 2008 at 2:15 PM, Bryan Richter > <[EMAIL PROTECTED]> wrote: > >> 2008/4/13, Hai Yi <[EMAIL PROTECTED]>: >> >> >>> 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: >>> >>> >>>[EMAIL PROTECTED]:~$ 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 >>> >>>[EMAIL PROTECTED]:~$ 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 >> _______________________________________________ >> vox-tech mailing list >>[EMAIL PROTECTED] >> http://lists.lugod.org/mailman/listinfo/vox-tech >> >> > _______________________________________________ > vox-tech mailing list >[EMAIL PROTECTED] > http://lists.lugod.org/mailman/listinfo/vox-tech
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