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Diameter request routing clarification

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I need clarification about Diameter request routing.

Consider the use-case:

host: pcef, realm: example.com
  |      A
  |CCR   |RAR
  V      |
host: relay, realm: example.com
  |      A
  |CCR   |RAR
  V      |
host: ocs, realm: example.com

RFC6733 says that request routing should be controlled by routing table.

Host `ocs' has to consume CCR requests to realm example.com of application 4, so it should have route

  (example.com, 4) -> (LOCAL)

Host `ocs' also has to send locally generated RAR requests to realm example.com of application 4, so it should have route

  (example.com, 4) -> (RELAY, relay)

How `ocs' host should operate to select correct route?

Does it mean that Diameter host should maintain two routing tables, one for handling of incoming requests, and one another for handling locally generated requests?

posted Jun 4, 2014 by Sridharan

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