IP Conflict

[Tachra]

Hello,

we have got a problem there!

some of our VMs which are runing windows server 2003 show ipconflict some times

how can we solve this issue?

more info :

Host Node has a vLan on datacenter network

so All IPS are in same range

all VM s are on single vSwitch and again all ips are on same IP RANGE

i searched google and saw that there is a KB at vmwae for this but i really did not get which part is for my problem?

the mentioned KB is :

kb.vmware.com/kb/1008177

any one has a resolution for this?!

[weinstein5]

How are you assigning your IP Address - hard coded or via DHCP?

[DSTAVERT]

This is a simple network question and not related to VMware. You have assigned the same IP address to multiple machnes. It can happen when copying a VM with a fixed address. It is possible when a DHCP address range over laps a fixed address. Use a network scanner to identify IP ownership. Check DHCP leases. ????

[a_p_]

For the IP conflicts you should find an entry in the Windows event logs. This entry should show the MAC address of the conflicting system. Maybe this can give you a hint on what to look for.

André

[Tachra]

Hello

i assign IP addresses directly to each VM not via DHCP!

i simply log into each vm and enter IP info!

[Tachra]

yeah that solved my issuei tracked that MAC adress down and solved this problem

[RaymondG]

I would try checking the event viewer as well for the Mac of the server that it is conflicting with...this will let you know if it is conflicting with a vm or physical server.   Also, try disabling the VM in questions and see if you can still ping the IP after a few minutes or so.  If you can....you just need to find that host.  If you cant then the issue could be a VIP.  A lost of load balancers wont allow you to ping the vips, but these virtual ips will still cause a conflict if reused elsewhere. 

-I've never had an instance where a duplicate IP message was incorrect....If you have load balancers and know you didnt give two servers the same ip, I would lean towards a Vip being the issue.