You can increase or decrease the maximum number of distributed ports available on the proxy switch on ESXi 5.1 hosts and earlier that are connected to a vSphere distributed switch.

Each proxy switch on hosts that are running ESXi 5.1 and earlier provides a finite number of ports through which virtual machines and network services can reach one or more networks. You have to increase or decrease the number of ports manually according to your deployment requirements.

Note: Increasing the number distributed ports of the proxy switches on hosts reserves and consumes more resources on the hosts. If some ports are not occupied, host resources that might be necessary for other operations remain locked and unused.

To ensure efficient use of host resources, the number of distributed ports of proxy switches are dynamically scaled up and down on ESXi 5.5 and 6.0 hosts. A proxy switch on such a host can expand up to the maximum number of ports supported on the host. The port limit is determined based on the maximum number of virtual machines that the host can handle.


  1. In the vSphere Web Client, navigate to the host.
  2. On the Manage tab, click Networking, and select Virtual switches.
  3. Select a distributed switch from the list.
  4. Click Update the maximum number of distributed ports on this host.
  5. Use the up and down arrows to set the maximum number of ports for the host and click OK.

What to do next

If you are changing the maximum number of ports for a host after the host is added to the distributed switch, you must restart the host before the new maximum takes effect.