On VSS port group there is only support for Ephemeral port binding. Now let’s look at the VDS deployments where there are additional limits placed by the vCenter Server. Before we dive into the limits discussion on VDS, I would like to point out one main difference between the port group configuration on VSS and the distributed port group configuration on VDS. Also, in my opinion there are enough virtual ports available as per the host maximums, and you should not have any problems regarding scaling your environment and achieving higher consolidation ratios. As long as the total number of VMs and vmknics on the VSSs are within the maximum range you are fine. You might have some VSS with more VMs connected and some with less. If you have multiple VSSs on the host this port maximum numbers don’t change. Hard limit means that the host will enforce the limit and you will not be allowed to create more than 4096 virtual ports or have more than 1016 active virtual ports. You can then compare the number of virtual ports with host limits. In this deployment by keeping the count of the number of VMs and vmknics on a host you can tell how many virtual ports are used. The virtual port is allocated only when a virtual machine or vmknic is connected to the port group. VSS only supports Ephemeral binding and allocates zero virtual ports when a port group is created. When you create a VSS you have an option to define the number of virtual ports on that specific virtual switch (default is 128). In such deployments you have to configure VSS on each host and in some cases there might be multiple VSSs on the same host. Total number of Ephemeral Port groups : 256Īfter taking a look at the limits, let’s focus our attention on the VSS deployments first. Total number of Static Distributed Port groups : 5000 Total distributed virtual network switch ports : 30,000 VDS Maximums (These are all vCenter Server maximums as vCenter server controls the configuration of VDS) Total virtual network switch ports per host : 4096 Host Maximums (These apply to both VSS and VDS): Here are the configuration maximums for vSPhere 5.0 as it pertains to Hosts, VSS, and VDS. I would like to clarify some of the things regarding these limits in this post. I always get this question, what will happen when you cross those configuration maximum limits? Especially, with the vSphere Distributed Switch configuration maximums where there are vCenter Server level limits as well as host level limits. In this blog entry, I will spend some time discussing the configuration maximums related to vSphere standard switch (VSS) and vSphere distributed switch (VDS).
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