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3.1.4.8.1.1 Bandwidth Admission Check Request

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The bandwidth management endpoint SHOULD perform the policy checks by following the procedures as specified in [MS-TURNBWM] section 3.2.4.1.

The Local Site Address attribute MUST be populated with one of the local Host Candidate addresses. The Remote Site Address attribute MUST be populated with any one Host Candidate addresses of the peer endpoint. If the peer endpoint has a Relayed Candidate, the Remote Relay Site Address attribute MUST be populated with the address of the Relayed Candidate. If both IPv4 and IPv6 Host Candidate or Relayed Candidate addresses are available then IPv4 addresses MUST be used to populate the respective Site Address attributes for the bandwidth checks.

If the endpoint is configured with both Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) bandwidth policy servers, the checks MUST be sent to both servers. The first valid check response from the server MUST be honored and subsequent check responses from the servers MUST be ignored.