IP address conflict

Found this in our /var/adm/messages file this morning

Sep 28 12:06:23 gandalf last message repeated 68 times

Sep 28 12:07:08 gandalf ip: [ID 903730 kern.warning] WARNING: IP: Hardware address '*0:06:5b:48:*3:**' trying to be our address 15*.1*5.*79.031!

And no one could login because this ip address is our LDAP server. Turns out it was a new dell computer we had added to the network this morning. However, running ifconfig/all in the dos prompt brought up all the right configuration i.e it had its own ip address listed correctly and the server address listed correctly. Its not the first time it has happened. The last time it was an HP printer that got ideas above its station.

Anybody heard of this happening before and how to solve it other than removing the offending device from the network ?

Thanks

Anna

Sunfire 6800 Solaris 8

[1015 byte] By [annib] at [2007-11-25 22:41:37]
# 1
To me it seems like you have bad arp entries. try to flush the arp table on the sun. It can happen also by a faulty switch. reboot the switch/hub and see if the faults increases after the reboot of th switch.
Neo_bel at 2007-7-5 14:18:53 > top of Java-index,General,Sun Networking Services and Protocols...
# 2

Hi ,

I have been getting the following warning message in /var/adm/messages file :

Nov 7 12:53:05 mhwks1 ip: [ID 903730 kern.warning] WARNING: IP: Hardware address '00:03:ba:1d:89:87' trying to be our address 010.000.000.193!

Nov 7 12:53:05 mhwks1 last message repeated 2 times

But 00:03:ba:1d:89:87 is the MAC address of 10.0.0.193 only.

Moreover this message is not continuous . Interestingly it comes at 53 minutes of any random hour eg 10:53 , 01:53, 11:53, 23:53 .

I am not able to understand that why this message is coming in the first place and that too at 53 minutes only.

Can anyone please help me out.

Cheers,

Rajesh.

rajeshchopra at 2007-7-5 14:18:53 > top of Java-index,General,Sun Networking Services and Protocols...
# 3
Hi, We rebboted the server mhwks1 and after that the i.p conflict messages stopped coming. Thanks , Rajesh.
rajeshchopra at 2007-7-5 14:18:53 > top of Java-index,General,Sun Networking Services and Protocols...
# 4

hi to all ,

Mar 7 17:33:30 cb-staging ip: [ID 903730 kern.warning] WARNING: IP: Hardware ad

dress '00:50:ba:8e:8a:f1' trying to be our address 172.016.106.020!

this is the error messages i m getting in my sun fire v440 .

this is new probelm i m facing today .

please help me to solve this probelm .

it is very critical

sundar

sundar at 2007-7-5 14:18:53 > top of Java-index,General,Sun Networking Services and Protocols...