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Overview of Routing Extensions

In cases where a stateful proxy may wish to remain in the request routing path for a session (multi round-trip messages per sessions, i.e. EAP, accounting etc.)

Stateless relays preceding the proxy may re-route request away from the proxy
Generic session level strict source routing will help
Application end-points and proxies are the only participants
Statically configure or dynamically discover request routing path for a session
Provisions for Failover and Failback situations

Introduction of Redirect-Realm AVP to aid in redirection
PPT Version