Detecting a duplicate ip address in Unix

[menace212]

What command can I use to detect if there is a duplicate ip address on the network. Can I use snoop with what or is ther something else I can use, without use any external appliation.

ex

snoop -arp mac-address {ip address}

what would be the correct format for this

 

[Mag0007]

assuming you are on the same subnet, trying pinging your broadcast address

you should not get anything duplicate there

HTH

 

[rzs0502]

Generally you would see problems if duplicates exist on servers and AIX for instance would log it in the error report.
If you want to scan the network for any duplicated amoung servers and workstations, you could use a little tool called nbtscan (

http://www.inetcat.org/software/nbtscan.html)

"If you always do what you've always done, you will always be where you've always been."

 

[Pinho]

I have a suggestion:
If you have two machines with the same address.
Turn off or unplug from network the machine that you know that have the IP.
Go to a third machine, clear the ARP table and ping the IP.
If it answer, the Ip is duplicate and now you have the ARP of this machine.

Luis Henrique Pinho
No Orkut - Unix Brasil

http://www.orkut.com/Community.aspx?cmm=678135