https://gal.vin/tags/truenas-core/ Recent content in truenas-core on gal.vin Hugo -- gohugo.io en &copy;{year}, All Rights Reserved Thu, 21 Sep 2023 10:26:32 +0100 daily https://gal.vin/posts/2023/freebsd-hyperv/ Thu, 21 Sep 2023 10:26:32 +0100 Thu, 21 Sep 2023 10:26:32 +0100 https://gal.vin/posts/2023/freebsd-hyperv/ The Problem When using FreeBSD based distro&rsquo;s like TrueNAS-Core or pfSense on Hyper-V network performance is very poor. The Solution Receive Segment Coalescing (RSC) is enabled by default on all virtual NICs with Hyper-V and it should be disabled if you are experiencing poor network performance. You can do this with a quick PowerShell command. Find out if Software RSC is enabled on your virtual NICs: 1 Get-VMSwitch -Name * | Select name, *RSC* Disable Software RSC on a specific virtual NIC: <h2 id="the-problem">The Problem</h2> <p>When using FreeBSD based distro&rsquo;s like TrueNAS-Core or pfSense on Hyper-V network performance is very poor.</p> <h2 id="the-solution">The Solution</h2> <p><a href="https://learn.microsoft.com/en-us/windows-server/networking/technologies/hpn/rsc-in-the-vswitch">Receive Segment Coalescing (RSC)</a> is enabled by default on all virtual NICs with Hyper-V and it should be disabled if you are experiencing poor network performance. You can do this with a quick PowerShell command.</p> <p>Find out if Software RSC is enabled on your virtual NICs:</p> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre class="chroma"><code class="language-powershell" data-lang="powershell"><span class="nb">Get-VMSwitch</span> <span class="n">-Name</span> <span class="p">*</span> <span class="p">|</span> <span class="nb">Select </span><span class="n">name</span><span class="p">,</span> <span class="p">*</span><span class="n">RSC</span><span class="p">*</span> </code></pre></td></tr></table> </div> </div><p>Disable Software RSC on a specific virtual NIC:</p> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre class="chroma"><code class="language-powershell" data-lang="powershell"><span class="nb">Set-VMSwitch</span> <span class="n">-Name</span> <span class="s2">&#34;virtual NIC name&#34;</span> <span class="n">-EnableSoftwareRsc</span> <span class="nv">$false</span> </code></pre></td></tr></table> </div> </div><h2 id="support-my-work">Support My Work</h2> <p>If you would like to support me, please check out the link below.</p> <ul> <li><a href="https://www.paypal.me/digressive">PayPal</a></li> </ul> <p>If you have any questions or comments, please leave them below.</p> <p>Thanks<br /> -Mike</p> featured image Hyper-V pfsense truenas-core freebsd