Cisco Cisco Expressway

Cisco

Contents

External policy overview

Using an external policy server

Configuring Expressway to use an external policy server

Configuring Call Policy to use an external service

Configuring search rules to use an external service

Default CPL for policy services

Policy server status and resiliency

Viewing policy server status via the Expressway

External policy request parameters

Appendix 1: Design examples

Call Policy design examples

Using a policy service to allow or deny calls

Using a policy service to route calls

Search rule design examples

Round-robin routing to a member of a group

Forwarding calls to other members of a group in a round-robin style

Appendix 2: CPL snippet examples

CPL snippets for call processing

Conditional routing CPL

Appendix 3: Message logging

Trace example: Call Policy request and response

Document revision history

External Policy on Cisco Expressway Deployment Guide (X8.2)

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