loss of DHCP traffic on VMs?

Steve Clark sclark at netwolves.com
Fri Mar 28 17:39:18 UTC 2014

On 03/28/2014 01:23 PM, Joseph Bernard wrote:
> We had an issue with DHCP yesterday which lead me to test UDP traffic from the VM we loaded on our VMware ESXi box.  I found that after around 25Mbps UDP starts to lose packets, and it gets worse and worse the fast you go.  I tried every virtual card type (e1000, VMXNET2, VMXNET3) with the same results.  I even tried on different servers, and they were also showing UDP packet loss.  Physical boxes on the same network showed no packet loss until I pushed their NICs to the limit (1Gbps).
> Has anyone faced DCHP problems by using a VM because of this?  If so, were you able to fix it or did you just move back to a physical box?
> Thanks,
> Joseph B.
Did you dedicate a nic to the virtual machine or are going thru a vswitch. We got dramatically better results by taking the nic out
of the vswitch dedicating it to the virtual machine. This was in a packet capture environment.

Stephen Clark
*NetWolves Managed Services, LLC.*
Director of Technology
Phone: 813-579-3200
Fax: 813-882-0209
Email: steve.clark at netwolves.com
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