0111 Redirect Servers

 

   In some architectures it may be desirable to reduce the processing

   load on proxy servers that are responsible for routing requests, and

   improve signaling path robustness, by relying on redirection.

 

   Redirection allows servers to push routing information for a request

   back in a response to the client, thereby taking themselves out of

   the loop of further messaging for this transaction while still aiding

   in locating the target of the request.  When the originator of the

   request receives the redirection, it will send a new request based on

   the URI(s) it has received.  By propagating URIs from the core of the

   network to its edges, redirection allows for considerable network

   scalability.

 

   A redirect server is logically constituted of a server transaction

   layer and a transaction user that has access to a location service of

   some kind (see Section 10 for more on registrars and location

   services).  This location service is effectively a database

   containing mappings between a single URI and a set of one or more

   alternative locations at which the target of that URI can be found.