loss of DHCP traffic on VMs?

Joseph Bernard jhb at clemson.edu
Fri Mar 28 19:26:09 UTC 2014


I didn't even realize that was an option.  I will try to see if that solves our problem.

Thanks!
Joseph B.


On Mar 28, 2014, at 1:39 PM, Steve Clark <sclark at netwolves.com<mailto:sclark at netwolves.com>>
 wrote:

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<mailto:steve.clark at netwolves.com>
http://www.netwolves.com<http://www.netwolves.com/>

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