vMotion of Exchange 2010 DAG member causes tempory loss of mail server connection

Posted on 2013-09-18
Medium Priority
Last Modified: 2013-09-23
ESXi 5.1 with 16 Hosts (10G) Connection to Cisco 6500 and Fibre to EMC VNX 5300 SAN.

We have been having issue where when we vMotion a live Mailbox Server although it only takes less than a minute we lose several pings and it does not look like a clean memory swap to me even though over vNotion Network is on an isolated VLAN (VmkPings) all good.

Problem is users complain they lose access to mail and have to re-enter their login credentials.

The Mailbox Server is 2008 R2 16Gig Ram around 2 TB 5 x DB's

Appreciate and insite here
Question by:999
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LVL 126
ID: 39504908
It's normal for the occasional "ping" to be lost when you vMotion, but we've never seen it impact service.

Is you physical networking correct?

Author Comment

ID: 39505009
We have 8 Hosts each in Dell M1000e Blade Chassis.

All Hosts have 384Gig  of Ram

Dell M1000e Chassis Have Force10MXL 10/40Gbe 10GE Chassis based switches so bandwidth should not be an issue.

We run VST so have multiple VLANS for VM's etc but vMotion on its own VLAN and VmkPings all good between hosts kernel ports.

What log is best to look at to see the results and process of the vMotion?
LVL 126
ID: 39505113
vkernel logs

Author Comment

ID: 39513632
Can you be more specific which log file and which one is specific to vMotion performance / Success and or failure..
LVL 126

Accepted Solution

Andrew Hancock (VMware vExpert / EE MVE^2) earned 2000 total points
ID: 39514003
You will need to tail the logs, and watch for errors.


Core VMkernel logs, including device discovery, storage and networking device and driver events, and virtual machine startup.

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