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Configuring Policies for IMS

For IMS environments, you can configure JUNOSe policies. When you configure classify-traffic conditions, you can set up the software so that the SAE expands into multiple classifiers before it installs the policy on the router. If you enter a comma-separated list of values in the source and destination network (IP address, mask, and IP operation) or port fields (for port-related protocols), the software creates a classifier for each possible combination of address and port. Note that the software does not expand classifiers for values that are entered as a range.

For example, the source configuration in the classify-traffic condition in Figure 22 would cause the condition to be expanded into four classifiers that have the following combination of source addresses and source ports:

192.1.1.0/255.255.255.0 eq 8 
192.1.1.0/255.255.255.0 eq 8080 
192.2.1.1/255.255.255.0 eq 8
192.2.1.1/255.255.255.0 eq 80 


Figure 22: Classify-Traffic Condition Example for Expanded Classifiers

Enabling Expansion of JUNOSe Classify-Traffic Conditions

To use the SRC CLI to enable the expansion of JUNOSe classify-traffic conditions:

  1. From configuration mode, access the SAE configuration statement for policy management.
  2. [edit]
    
    user@host# edit shared sae configuration policy-management-configuration
    
    
    
  3. Enable the SAE to expand the JUNOSe classify-traffic conditions into multiple classifiers before it installs the policy on the router.
  4. [edit shared sae configuration policy-management-configuration]
    
    user@host# set enable-junose-classifier-expansion
    
    
    

    NOTE: Because classifier expansion uses processing resources when the policy is created, you should set this property to true only if you are going to use the feature.


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