topic Re: Duplicate Mac address in Operating System - HP-UX

Duplicate Mac address

Steven Zurita — Fri, 18 Oct 2002 21:52:45 GMT

We recently got a new hard drive and copy to this drive all the files from another server. During bootup we get the message duplicate mac address and the mac address that is displaying is from the server that we copy the files from. How can I fix this? I have HP-UX 9.05.

Thanks,
Steven

Re: Duplicate Mac address

harry d brown jr — Fri, 18 Oct 2002 22:11:33 GMT

Ouch 9.05? Yeah, we have two for old reporting issues - but I'm home and they are unavailable to research on. I don't even remember if you could override the lan cards mac address back then, like you can today.

take your mac address and search /etc (most likely place)

find /etc -type f -exec grep -il MACaddrHERE {} \;

The "i" option on grep is very important, and don't include the "0x" in front of the MAC addr.

live free or die
harry

Re: Duplicate Mac address

T G Manikandan — Sat, 19 Oct 2002 10:23:27 GMT

grep /etc

it should list the configuration files of the NIC.
The system boots up with this info.

Thanks

Re: Duplicate Mac address

Steven Zurita — Wed, 23 Oct 2002 16:18:40 GMT

I was not able to find the MAC address in the /etc directory. I search for the mac address using colons format "XX:XX:XX:XX:XX" Also,the following is the error that I am getting when I execute netlinkrc. "Network Probe Error 2012, pid [CIS]
ARP packet duplicate IP address: X.X.X.X from 00XX-XXXX-XXXX. The HP is displaying the right MAC address when I run lanscan command. This tells me that the system knows the right MAC address for the HP but there is probably a file that we copy over from the other server that has the wrong MAC address.

Thanks,
Steven

Re: Duplicate Mac address

Larry Reinhart — Wed, 23 Oct 2002 16:43:03 GMT

Steven,

We have many systems running 9.03 (on HP 712's). We have a master hard drive that we duplicate when we have a hard drive crash. We never had problems with duplicate mac addresses. We have had problems with duplicate IP addresses when we make a mistake with the /etc/src.sh file and the /etc/hosts file.
So, what is the exact error that you are seeing? What is the line in netlinkrc that is erroring out?

Have a great HP day!
Larry

Re: Duplicate Mac address

Erik Fredette — Wed, 23 Oct 2002 16:54:25 GMT

Hi Steven,

I don't know about 9.05, but with systems 10.20 and higher you can specify your MAC address in the lan cards configuration files located in /etc/rc.config.d/. Look for files beginning with "hp". Good chances your MAC address from the other server was specified in one of those files.

Hope this helps.

Re: Duplicate Mac address

John Bolene — Wed, 23 Oct 2002 17:14:47 GMT

look in .etc/rc.config.d/hpetherconf

you may have something in the station address field which overrides the MAC on the ether card

or you can use lanadmin to change it

Re: Duplicate Mac address

John Bolene — Wed, 23 Oct 2002 17:18:20 GMT

forgot to add...

we actually had 3 pairs of xterms come in with hardware duplicated MAC's

turns out that it was a manual thing to burn the rom's with the MAC, and sometimes they lost count when they went to lunch or between days

if you happened to order several hundred xterms at a time, there was a good possibility you would get at least one duplicate