Installation guide

Ephemeral Ports
View Manager uses ephemeral ports to establish TCP connections between View Connection Server and the
View desktops that it administers. To support a large View desktop deployment, you can increase the number
of available ephemeral ports.
An ephemeral port is a short-lived endpoint that is created by the operating system when a program requests
any available user port. The operating system selects the port number from a predefined range, typically
between 1024 and 65535, and releases the port after the related TCP connection terminates.
By default, the system can create a maximum of approximately 4,000 ephemeral ports that run concurrently
on Windows Server 2003 and approximately 16,000 on Windows Server 2008.
On 32-bit Windows Server 2003 computers, you should increase the number of available ephemeral ports if a
View Connection Server instance is likely to use more than 800 concurrent client connections.
Calculate the Number of Ephemeral Ports
You can calculate the number of ephemeral ports that are needed on each View Connection Server instance to
support a large number of concurrent client connections.
Procedure
u
Use the following formula.
Number of ephemeral ports = ( (5 x clients) / servers ) + 10
Where
clients
Projected number of concurrent client connections
servers
Number of View Connection Server instances in the replicated group
Example: Calculating the Number of Ephemeral Ports
For example, you might plan a deployment managed by three View Connection Server instances. If you
anticipate having 3,000 concurrent client connections, you would need 5,010 ephemeral ports, as shown in
Table 5-10.
Table 5-10. Example of Calculating the Number of Ephemeral Ports
Configuration Parameter Sample Values
Projected number of concurrent client connections 3,000
Number of View Connection Server instances in the
replicated group
3
( (5 x clients) / servers ) + 10 = number of ephemeral ports on
each View Connection Server
(5x3,000) / 3 + 10 = 5,010
What to do next
Use the “Worksheets for Calculating Ephemeral Ports and TCB Hash Table Size,” on page 63 to fill in values
for your deployment.
Increase the Number of Ephemeral Ports
You can edit the Windows registry to increase the maximum number of ephemeral ports on a Windows Server
computer on which View Connection Server runs.
Active Directory group policies can override registry entries. When possible, use a group policy to set the
maximum number of ephemeral ports on View Connection Server.
VMware View Installation Guide
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