I'm learning about many many networking topics so I can "do proxy ARP."
My router, here named sinai, reports its MAC address as xx:xx:xx:xx:xx:F8
on its HTML status page.
My wireless adapter (wlan0) reports its access point's MAC address as xx:xx:xx:xx:xx:F9
The ARP cache reports that the MAC address of IP 192.168.10.1 is xx:xx:xx:xx:xx:F7
If sinai has IP address 192.168.10.1 and is serving as wlan0's access point, then why does it have 3 distinct (and consecutive) MAC addresses?
PS My guess is it either has something to do with routers having multiple NICs, or with somebody lying to someone.
PPS I haven't learned where the handle to the ARP toilet is yet, or I'd flush before asking this question.
schmo@mitzvah:~$ date ; iwconfig wlan0 ; arp -a
Sun Oct 21 20:32:53 EDT 2012
wlan0 IEEE 802.11bg ESSID:"sinai"
Mode:Managed Frequency:2.5 GHz Access Point: 21:AB:B5:23:35:F9
Bit Rate=54 Mb/s Tx-Power=20 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Link Quality=61/70 Signal level=-49 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:805 Invalid misc:110 Missed beacon:0
? (192.168.10.1) at 21:ab:b5:23:35:f7 [ether] on wlan0
HTML Router Status Page:
Current Time: Sun, 21 Oct 2012 17:32:58
MAC Address: 21:AB:B5:23:35:F8
Router Name: sinai