Create Server Pool elements
The Server Pool element collects servers that provide a particular service into a single element and defines the settings for handling the inbound traffic.
Before you begin
You must have a Host element that represents the internal IP address of each server that you want to add to the Server Pool.
We recommend creating a separate Server Pool element for each type of service. Add servers to Server Pools based on the services that the servers provide.
The Server Pool can have up to 255 members. If you have only one server and you want to balance the inbound traffic between your NetLinks, you can define a Server Pool element with just one host. This approach allows dynamic DNS update information to be used to prevent contacting clients from attempting to use a NetLink that is out of service.
For more details about the product and how to configure features, click Help or press F1.
Steps
- Select Configuration, then browse to Secure SD-WAN.
- Browse to Traffic Handlers.
- Right-click Traffic Handlers, then select .
- In the Name field, enter a unique name for the Server Pool.
-
Define the external IP addresses of the Server Pool.
-
Add servers to the list of Server Pool members.
- Click OK.
Server Pool Properties dialog box
Use this dialog box to define Server Pools.
Option | Definition |
---|---|
General tab | |
Name | The name of the element. |
Category (Optional) |
Includes the element in predefined categories. Click Select to select a category. |
Comment (Optional) |
A comment for your own reference. |
Option | Definition |
---|---|
External Addresses section | |
NetLink | Specifies the NetLink you want to use. |
IP Address | Specifies the external destination IP address for the Server Pool. |
Status | Shows the NetLink status: Enabled or Disabled. Enabled NetLinks are used in the Server Pool. |
Proxy ARP/Neighbor Discovery | When enabled, automatically generates a proxy ARP or neighbor discovery entry for the external IP address in the selected network. |
Add | Opens the External Address dialog box. |
Edit | Opens the External Address dialog box and allows you to change the settings for the selected NetLink. |
Remove | Removes the selected external address. |
Enable Dynamic DNS Updates | Enables Dynamic DNS Updates from the Server Pool to the DNS Server. |
DNS Server |
Specifies the External DNS Server element to which the DDNS updates are sent. Note: Only IPv4 addresses are supported for DNS servers for DDNS updates. The External DNS Server element must have an
IPv4 address.
|
FQDN | Specifies the fully qualified domain name (FQDN) for the Server Pool service (for example, “www.example.com”). |
Option | Definition |
---|---|
Server Pool Members section | |
Element | Shows the names of the elements selected as pool members. |
IP Address | Shows the IP addresses of the elements selected as pool members. |
Add | Adds a row to the table. |
Remove | Removes the selected row. |
Up | Moves the selected row up. |
Down | Moves the selected row down. |
Allocate Traffic to Servers by |
Defines how likely it is that traffic is redirected to a particular server. Usually it is best to select the least granular option that still produces an acceptable distribution of traffic. The options are (from least granular to most granular):
|
Option | Definition |
---|---|
Monitoring tab | |
Frequency Check | Specifies how often you want the availability to be checked. |
Method | Specifies the method for monitoring the availability of the servers in the Server Pool.
|
Option | Definition |
---|---|
When Method is Agent | |
Port | Defines the port number. |
Option | Definition |
---|---|
When Method is TCP | |
Port | Defines the port number. |
Request (Optional) |
Specifies the string of ASCII text that the engine sends. |
Response (Optional) |
Specifies the string of ASCII text that you expect to receive. |
Option | Definition |
---|---|
When Method is HTTP | |
Port | Defines the port number. |
Path | Specifies the path to the webpage. |
Host Header (Optional) |
Specifies the host name of the web server. |
Response (Optional) |
Specifies the string of ASCII text that you expect to receive. |
External Address dialog box
Use this dialog box to define the external address of a Server Pool as a property of the Server Pool element.
Option | Definition |
---|---|
NetLink | Specifies the NetLink you want to use. |
Network | Specifies the network to which the Server Pool’s external IP address belongs. |
IP address | Specifies the external IP address for the Server Pool. |
Status |
Specifies the NetLink status.
|
Automatic Proxy ARP / Neighbor Discovery Entry Generation |
When enabled, automatically generates a proxy ARP or neighbor discovery entry for the IP address in the selected network. If you do not select this option, you must define the ARP or neighbor discovery entry manually in the Engine element properties. |