<div>
Moving mailboxes is not a good indicator to check network performance, how about a file transfer over network. Try to transfer one huge file (2012 iso file or something) and check speed on that?<br />
<br />
Are you using Hyper-V?
</div>


<div>
Here is a screenshot of transferring a 2.9 GB ISO file (while that one user mailbox is still being migrating too). It started off pretty high (22-26 MBps) but then it dipped (as noted in the screenshot). Now it looks like it is back at around 18-22 MBps. That is better but is still low, right?<br />
<br />
Yes we are using MS Hyper-V<br />
<a href="https://filedb.experts-exchange.com/incoming/2014/11_w47/883334/autocad-transfer.JPG" target="_blank" class="file-inline" title="file transfer (124 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>autocad-transfer.JPG</a>
</div>


autocad-transfer.JPG

<div>
Also....if it matters any......the server from which the ISO file is being copied from is the same server where the mailbox is being migrated from.
</div>


<div>
I agree with Saschao -- start by determining your specific problem. &nbsp;The utility FPING (<a href="http://www.kwakkelflap.com" rel="ugc">www.kwakkelflap.com</a>) can give you a real good idea of your network round trip time using this command:<br />
&nbsp; &nbsp; fping &lt;target&gt; -t 0 -n 100 -s 32<br />
This will send 100 packets to the target. &nbsp;Test this from various machines in combination on your network. &nbsp;Start with two physical workstations next to each other; then hit the physical server; then hit the VM server, watching the difference in performance all the way. &nbsp;Then, re-test with -s 32000 to test for throughput.<br />
<br />
The next step is to look at disk throughput. &nbsp;Copying a large file that doesn't fit in the memory cache is more of a test of the disk drives than of anything else, as the network cannot run any faster than the disks can accept data. &nbsp;Grab a copy of SQLIO from Microsoft and perform some testing with that. &nbsp;Here is a sample command that I like to test disk write performance:<br />
&nbsp; &nbsp; sqlio -kW -s30 -frandom -o8 -b64 -LS -Fparam.txt<br />
Again. do this on your workstation, the various drives of physical servers, and the VM drives. &nbsp;This will give you a relative performance of each drive.<br />
<br />
Your file-copy tests are a good next step, but stick with a smaller file. &nbsp;(The 100MB files created by SQLIO might be a good choice.) &nbsp;By sticking to files that are already in memory, you eliminate disk latency and can concentrate more on file transfer times. &nbsp;Again, test this by copying in various combinations (physical-&gt;physical, VM-&gt;phys, phys-&gt;VM, and include a workstation or two in the mix, too. &nbsp;Again, create a list of relative performance levels in each area. &nbsp;<br />
<br />
Once you have the above data, you should get a feel for which component is actually the slowest (network, disk, file transfer). &nbsp;Determining the WHY is just as difficult, but you have to know which issue you have before you can dig any further...
</div>


<div>
You should really use something measuring network performance only, not involving the I/O storage subsystem, like netIO at <a href="http://www.ars.de/ars/ars.nsf/docs/netio" rel="ugc">http://www.ars.de/ars/ars.nsf/docs/netio</a>&nbsp;. iperf (<a href="https://iperf.fr/" rel="ugc">https://iperf.fr/</a>) is another popular tool.
</div>


<div>
one other item to note disabling ipv6 is not a recommended nor supported option for windows server 2008 onward. &nbsp;The server subsystem uses ipv6 a lot.
</div>


<div>
Can you post the version of the driver that WAS on the machine, along with the one you updated it to? &nbsp;Having this detail is important so that when people refer back to this ticket in future months, they will benefit from the time we all spent working on it.
</div>


<div>
Bill Bach - Good point. While I do not recall what the 'old' versions were the latest versions that did the trick are....<br />
<br />
FIRMWARE = Broadcom NetXtreme I and II Network Device Firmware 7.10.18<br />
<br />
DRIVE = Broadcom Windows 64bit driver update for NetXtreme I and NetXtreme II Ethernet adapters for the 18.4.2 update
</div>


<div>
what I noted fixed the issues
</div>


<div>
<div class="content wysiwyg-content">
First some background on our setup...<br />
<br />
1. Dell server running Windows 2012 R2 with all latest updates applied. The server has a Broadcom Gigabit Ethernet card (quad port). Currently IP v6 is disabled as we do not use it. The Windows environment is a host environment currently with one virtual server.<br />
2. Other old servers all running Windows 2003<br />
3. All servers and workstations are plugged in to Netgear ProSafe 24-port Gigabit Smart Switch. &nbsp; <br />
<br />
That all said, our challenge is that the performance of the network throughput seems very slow on the virtual server. Check out the attached screenshot. This screenshot represents the activity on the virtual server when we are migrating one user mailbox from the old mail server over to the new mail server (which is the virtual server). The highest peak for a short period of time goes to the 7.7 Mbps mark but generally speaking the entire process appears to be very slow for a gigabit environment<br />
<br />
Any suggestions on what to check to improve the network performance of the W2012 server?<br />
<a href="https://filedb.experts-exchange.com/incoming/2014/11_w46/883309/ethernet.JPG" target="_blank" class="file-inline" title="ethernet.JPG (93 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>ethernet.JPG</a>
</div>
</div>


ethernet.JPG

First some background on our setup...

1. Dell server running Windows 2012 R2 with all latest updates applied. The server has a Broadcom Gigabit Ethernet card (quad port). Currently IP v6 is disabled as we do not use it. The Windows environment is a host environment currently with one virtual server.
2. Other old servers all running Windows 2003
3. All servers and workstations are plugged in to Netgear ProSafe 24-port Gigabit Smart Switch.   

That all said, our challenge is that the performance of the network throughput seems very slow on the virtual server. Check out the attached screenshot. This screenshot represents the activity on the virtual server when we are migrating one user mailbox from the old mail server over to the new mail server (which is the virtual server). The highest peak for a short period of time goes to the 7.7 Mbps mark but generally speaking the entire process appears to be very slow for a gigabit environment

Any suggestions on what to check to improve the network performance of the W2012 server?

poor network performance

Windows Server 2012 is the server version of Windows 8 and the successor to Windows Server 2008 R2. Windows Server 2012 is the first version of Windows Server to have no support for Itanium-based computers since Windows NT 4.0. Windows Server 2012, now in its second release (Windows Server 2012 Release 2) includes Foundation, Essentials, Standard and Datacenter, and does not support IA-32 or IA-64 processors.

Windows Server 2012

Servers are computing devices that are similar to desktop computers in that they have the same basic components, but are significantly different in size, configuration and purpose. Servers are usually accessed over a network, and many run unattended, without a computer monitor, input device, audio hardware or USB interfaces. Many servers do not have a graphical user interface (GUI), and are configured and managed remotely. Servers typically include hardware redundancy such as dual power supplies, RAID disk systems, and ECC memory, along with extensive pre-boot memory testing and verification. Critical components might be hot swappable, and to guard against overheating, servers might have more powerful fans or use water cooling.

Server Hardware

Network analysis is the process of identifying and remediating the processes and systems within a network, including performance, connectivity and security. The process is performed through the use of tools developed for monitoring and analyzing network activity. Network problems that involve finding an optimal way of doing something are studied under the name combinatorial optimization. Examples include network flow, shortest path problem, transport problem, transshipment problem, location problem, matching problem, assignment problem, packing problem, routing problem, Critical Path Analysis and PERT (Program Evaluation & Review Technique).

Network Analysis

Since 1984, Dell has been delivering technology to fit your life.
Dell is in Enterprise, Home Office and Consumer sectors of the market, supplying a broad range of customizable desktops, laptops, notebooks, servers, storage, and network devices.