topic Re: MAC address in Operating System - HP-UX

MAC address

Chern Jian Leaw — Thu, 16 May 2002 08:48:46 GMT

Hi
Is there a way which I can find the MAC address of a particular HP workstation, given only the IP address?

If so, could someone provide the command on how to find the MAC address?

Thanks

Re: MAC address

Tom Geudens — Thu, 16 May 2002 08:51:49 GMT

Hi,
You cannot do this remote, but on the workstation itself you can do (example) :
root/sv00138#lanscan
Hardware Station Crd Hdw Net-Interface NM MAC HP-DLPI DLPI
Path Address In# State NamePPA ID Type Support Mjr#
0/0/0/0 0x001083FC02BC 0 UP lan0 snap0 1 ETHER Yes 119

Hope this helps,
Tom

Re: MAC address

Ruediger Noack — Thu, 16 May 2002 08:53:07 GMT

A simple way:
ping the workstation an then look in the arp cache: arp -a

Ruediger

Re: MAC address

Trond Haugen — Thu, 16 May 2002 08:53:56 GMT

As there is no connection between MAC- and IP-adress, strictly no. But a posible solution is:
telnet IP
logind: root
lanscan

Not sure if this is what you wanted.

regards,
Trond

Re: MAC address

Tom Geudens — Thu, 16 May 2002 08:56:29 GMT

Oh ... I so ashamed ... arp -a does indeed do the trick remotely.
I'm going very red in the face now :-)

Regards,
Tom

P.S. N/A for this one please

Re: MAC address

steven Burgess_2 — Thu, 16 May 2002 09:07:52 GMT

Hi

arp -a | grep

Steve

Re: MAC address

manoj_pu — Thu, 16 May 2002 09:23:51 GMT

Hi

You can get macaddress by "ping" and "arp -a" if the IP is in LAN.

If it is connected through router then yo will have to do telnet and do lanscan

Manoj

Re: MAC address

T G Manikandan — Thu, 16 May 2002 09:25:47 GMT

#arp -a |grep should give it.
If the result is blank

Then just do a ping to the remote ip-address(ip for which you require mac-address)
#ping
#arp -a|grep

Thanks

Re: MAC address

Chern Jian Leaw — Thu, 16 May 2002 09:48:11 GMT

HI Tom,
From your generated output below:

root/sv00138#lanscan
Hardware Station Crd Hdw Net-Interface NM MAC HP-DLPI DLPI
Path Address In# State NamePPA ID Type Support Mjr#
0/0/0/0 0x001083FC02BC 0 UP lan0 snap0 1 ETHER Yes 119

Which is the MAC address? Is it the HP-DLPI, or 0x001083FC02BC ?

Thanks.

Re: MAC address

Chern Jian Leaw — Thu, 16 May 2002 09:51:35 GMT

TG,

I'm afraid arp -a |grep still produces a blank result, after doing a ping or even logging into that ip_address.

Please advice.

Re: MAC address

T G Manikandan — Thu, 16 May 2002 09:52:45 GMT

#lanscan |awk '{print $2}'|grep -v Station|grep -v Address

is the MAC-address!

Re: MAC address

Mahima Kaushik_2 — Thu, 16 May 2002 09:58:40 GMT

The Mac address can be found written in a file under /etc/rc.config.d directory. The file can be hpfddiconf or hpetherconf depending upon your network configuration. The variable should be listed something like this.

STATION_ADDRESS=0x08******

Mahima

Re: MAC address

Pete Randall — Thu, 16 May 2002 09:59:58 GMT

In answer to your question,
0x001083FC02BC is the MAC address in Tom's output.

HTH
Pete

Re: MAC address

Ruediger Noack — Thu, 16 May 2002 10:00:10 GMT

Hi,

the reading of arp cache works from a remote box. You don't need to login to the box you want to recognize the MAC address. The MAC adresses of local NIC are *NOT* in the arp cache.

Ruediger

Re: MAC address

Chern Jian Leaw — Thu, 16 May 2002 10:38:50 GMT

mahima,
When I opened the file hpetherconf, there isn't a value assigned to the HP_ETHER_STATION_ADDRESS[0] variable.

Could you please explain how is it possible for the lanscan to still produce the MAC address without it being defined the hpetherconf file?

Thanks

Re: MAC address

Pete Randall — Thu, 16 May 2002 10:44:54 GMT

From what I can gather from the man page, lanscan reads from the running kernel, not from any configuration file. That would explain how it can find the MAC address, I think.

Pete

Re: MAC address

John Palmer — Thu, 16 May 2002 10:48:37 GMT

Hi,

HP_ETHER_STATION_ADDRESS allows you to set a particular MAC address if you want to. This was used historically on systems where application software licensing depended on a MAC address.

If you don't set it (which is the default) then the unique hardware address of the card is used.

Regards,
John

Re: MAC address

Tom Geudens — Thu, 16 May 2002 11:45:28 GMT

Hi,
The MAC address in the output is
0x001083FC02BC

Regards,
Tom

Re: MAC address

Rich Wright — Thu, 16 May 2002 12:27:26 GMT

It looks to me like the "arp -a" method does not work if going through a router.