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Old 05-30-2008, 09:06 AM   #1
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Registered: Oct 2007
Location: India
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Question WARNING: IP: Hardware address '***' trying to be our address

Hi All,

We have sun v880 in solaris 9 OS. I'm getting error about IP addresses and I don't know why. But N/W card working fine it will ping the all servers (internally and externally) and check the server applications working fine.

May 29 14:10:48 last message repeated 3 times

May 29 16:07:39 ip: [ID 903730 kern.warning] WARNING: IP: Ha
rdware address '00:03:ba:5d:1a:d1' trying to be our address!

May 29 16:07:39 last message repeated 1 time

May 29 16:22:11 ip: [ID 903730 kern.warning] WARNING: IP: Ha
rdware address '00:03:ba:5d:1a:d1' trying to be our address!

May 30 09:07:45 ip: [ID 903730 kern.warning] WARNING: IP: Ha
rdware address '00:03:ba:5d:1a:d1' trying to be our address!

May 30 09:07:45 last message repeated 1 time

Why do I get these error messages?
Old 05-30-2008, 09:51 AM   #2
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Registered: Dec 2005
Location: Massachusetts, USA
Distribution: Ubuntu 10.04 and CentOS 5.5
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A computer whose network card with that hardware address is configured to use the IP address as the computer where the error message is being displayed. Chances are that the second computer cannot access the network because the router controlling that subnet can't map two hardware addresses to the same IP address so you may be able to find it by looking for a computer with network problems.

The computer where you are seeing this error and the computer that is causing the problem have two possible configurations for each computer so we have four possible scenarios. ( 00, 01, 10, 11 )

00 - both computers use their hosts file to configure their IP address

01 and 10 - one computer uses DHCP and the other uses its hosts file to configure its IP address

11 - both computers use DHCP to configure their IP address

The 11 scenario is the least likely unless they are using different DHCP servers to obtain their address.

The resolution is to find the problem computer and ensure that it and the computer showing the error message are configured to use different IP addresses.

Last edited by stress_junkie; 05-30-2008 at 09:55 AM.


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