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Tags: vmware, dvs, howto
MAC learning is required in certain situations such as when running nested environments (ESXi on ESXi etc).
This is unfortunately not possible from the web UI, so the API needs to be used.
I won't be calling the API directly in this document, but I'll use scripts written by others to do so.
The procedure is quite simple, takes just a few minutes.
1. Assuming you are on Linux (CentOS7) please install Microsoft's Powershell
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curl https://packages.microsoft.com/config/rhel/7/prod.repo | tee /etc/yum.repos.d/microsoft.repo yum install -y powershell
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2. Download vmware-scripts from Github
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yum -y install git && git clone https://github.com/lamw/vmware-scripts.git cd vmware-scripts/powershell
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3. Launch Powershell, install VMWare's PowerCLI (Powershell addon) and load the MAC learning script, just as you would in bash
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pwsh Install-Module -Name VMware.PowerCLI |
4. Disable Powershell's SSL validity checking (as you most likely have a self-signed one) and connect to vCenter (using your own user/pass combination)
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Set-PowerCLIConfiguration -InvalidCertificateAction:Ignore Connect-VIServer -Server 10.0.35.226 -User Admin -Password Pass |
5. First let's get the current values and then if necessary let's set up MAC learning.
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Get-MacLearn -DVPortgroupName @('pg.1337.200.1-dvSwitch1') MacLearning : False NewAllowPromiscuous : False NewForgedTransmits : False NewMacChanges : False Limit : LimitPolicy : LegacyAllowPromiscuous : False LegacyForgedTransmits : False LegacyMacChanges : False |
Ok, so MAC learning is disabled. Let's enable it.
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Set-MacLearn -DVPortgroupName @("virtual.switch.1337.200.1-dvSwitch1") -EnableMacLearn $true -EnablePromiscuous $false -EnableForgedTransmit $true -EnableMacChange $false |
Enjoy!