loss of DHCP traffic on VMs?
swedekind at bluecatnetworks.com
Fri Mar 28 17:38:55 UTC 2014
Any chance that you have an AV scanner (that inspects network packets) installed on the DHCP server VM? That's a characteristic of a memory leak in the scanner's network driver. Unfortunately, temporarily disabling the AV scanner won't be sufficient, as the driver will remain resident. To verify, uninstall it for a while and see if the problem goes away. You can always use a different AV vendor until they get it sorted out if that's the culprit.
For your specific question, no, I've never heard of that problem, and my organization puts out a lot of virtual ISC based DHCP servers on ESX. It doesn't mean it's not happening, but I'd exhaust other avenues first.
From: dhcp-users-bounces+swedekind=bluecatnetworks.com at lists.isc.org [mailto:dhcp-users-bounces+swedekind=bluecatnetworks.com at lists.isc.org] On Behalf Of Joseph Bernard
Sent: Friday, March 28, 2014 12:23 PM
To: Users of ISC DHCP
Subject: loss of DHCP traffic on VMs?
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?
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