Installation guide

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Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance
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Chapter 6 Configuring Real Servers and Server Farms
Configuring Server Farms
Configuring Server Farm HTTP Return Error-Code Checking
After adding a server farm, (see the “Configuring Server Farms” section on page 6-18), you can
associate real servers with it and configure the predictor method and retcode maps. The configuration
screens for these attributes appear beneath the Server Farms table or after you have successfully added
a new server farm.
Use this procedure to configure HTTP return error-code checking (retcode map) for a server farm.
Note This feature is available only for server farms configured as hosts. It is not available for server farms
configured with the type Redirect.
Assumption
A host type server farm has been added to the ACE Appliance Device Manager. (See Configuring Server
Farms, page 6-18.)
Procedure
Step 1 Choose Config > Virtual Contexts > context > Load Balancing > Server Farms. The Server Farms
table appears.
Step 2 Select the server farm you want to configure return error-code checking for, and then select the Retcode
Map tab. The Retcode Map table appears. If you do not see tabs beneath the Server Farms table, click
the Switch Between Configure And Browse Modes button.
Step 3 Click Add to add a new entry to the table. The Retcode Map configuration screen appears.
Note You cannot modify an entry in the Retcode Map table. Instead, delete the existing entry, and then
add a new one.
Step 4 In the Lowest Retcode field, enter the minimum value for an HTTP return error code. Valid entries are
integers from 100 to 599. This number must be less than or equal to the number in the Highest Retcode
field.
Step 5 In the Highest Retcode field, enter the maximum number for an HTTP return error code. Valid entries
are integers from 100 to 599. This number must be greater than or equal to the number in the Lowest
Retcode field.