VMware vSphere

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  • 1.  IP Conflict

    Posted Feb 10, 2011 07:32 PM

    Hello,

    we have got a problem there!

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

    how can we solve this issue?

    more info :

    Host Node has a vLan on datacenter network :smileyhappy:

    so All IPS are in same range:smileyhappy:

    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?!



  • 2.  RE: IP Conflict

    Posted Feb 10, 2011 07:42 PM

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



  • 3.  RE: IP Conflict

    Posted Feb 10, 2011 07:47 PM

    Hello

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

    i simply log into each vm and enter IP info!



  • 4.  RE: IP Conflict

    Posted Feb 10, 2011 08:19 PM

    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.



  • 5.  RE: IP Conflict

    Posted Feb 10, 2011 07:45 PM

    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. ????



  • 6.  RE: IP Conflict

    Posted Feb 10, 2011 07:45 PM

    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



  • 7.  RE: IP Conflict

    Posted Feb 10, 2011 08:19 PM

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