Determining MAC id of remote machine

ravi_chobey · 02-02-2008, 02:25 AM

Hi All,

Currently i am working on a ARM9 processor system,it is having a ethernet port.I don't know the MAC id of that port.Is is possible to determine the MAC id of that board? I need your support for this.
I have tried this command, is mentioned in man page of ifconfig:

[root@localhost ~]# ifconfig dstaddr addr
addr: Unknown host
ifconfig: `--help' gives usage information.

Is there any command for that?

Regards,
Ravi

camorri · 02-02-2008, 05:00 AM

Just type 'ifconfig' ( without the quotes ) as root user, it will list all interfaces. Assuming you have only one card, you should see one called localhost and one called somehting like eth0. eth0 will be the interface you need to look at. There should be a field marded HWaddr with some digits after it. Those digits are your MAC address.

It you type 'ifconfig --help' the system will give you help for the command. Also, 'man ifconfig' will give you information on how to use the command.

MyHeartPumpsFreon · 02-02-2008, 08:17 AM

In addition to ifconfig, iwconfig will give you basic information about the wireless access point you're connected to: essid, MAC address, bit rate, link quality and frequency.

Just an FYI.

Brandon

michaelk · 02-02-2008, 10:03 AM

The command ifconfig will display information for the computer your typing the command on but will not work for a remote machine. For a remote PC on your local network you can use the arp command i.e.
arp -a

If nothing is displayed then the remote machine is not in the arp table. Pinging the device should fix that problem.

ravi_chobey · 02-03-2008, 10:20 PM

Dear All,

Thanks for your support.

The "arp -a" worked for it.

Regards,
Ravi

win32sux · 02-04-2008, 08:02 AM

An alternative way to do it is with arping. Example:

Code:

arping -c1 192.168.1.100 2> /dev/null | \
grep "Unicast reply from" | awk '{print $5}' | cut -c 2-18

This would give you the MAC address of the box with IP 192.168.1.100.

Just my