What is Diameter base protocol?
Diameter is a protocol used for authentication, authorization, and accounting in IP networks. It is specified in IETF RFC 3588 (“Diameter base protocol”). The Cx reference point in IMS is used between I-CSCF and HSS, as well as between S-CSCF and HSS and is based on the Diameter base protocol.
What is AVP in Diameter protocol?
A Diameter message, as we see in Figure 4.11, comprises a fixed length header part and a set of Attribute Value Pairs (AVP). The header contains protocol-, command-, and session-related information.
What is Diameter protocol used for?
The Diameter Protocol provides authentication, authorization, and accounting (AAA) messaging services for network access and data mobility applications in 3G, IP Multimedia Systems (IMS), and LTE/4G networks.
How does Diameter protocol work?
Diameter is an extensible messaging protocol to enable AAA function in IP and multimedia networks. Diameter is a Peer-to-Peer (P2P) protocol, where a peer can function either as a client or a server. Unlike a client-server model, in Diameter, a server has the capability to make a request to its peer as well.
Where is diameter used?
In geometry, a diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. It can also be defined as the longest chord of the circle. Both definitions are also valid for the diameter of a sphere. of a diameter is also called the diameter.
Is diameter UDP or TCP?
Like RADIUS, Diameter provides AAA functionality, but uses TCP and SCTP instead of UDP, therefore delegating detection and handling of communication problems to those protocols. Diameter Applications extend the base protocol by adding new commands and/or attributes.
Is diameter used in 5G?
For example, a 5G subscriber who wants to make voice calls, will initiate the voice session on diameter but it must be connected to the same PCF which was previously selected while creating an N7 session over HTTP/2 in 5GC.
Is diameter only for circles?
In geometry, a diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. For a curve of constant width such as the Reuleaux triangle, the width and diameter are the same because all such pairs of parallel tangent lines have the same distance.
What is diameter in networking?
Diameter is a next-generation industry-standard protocol used to exchange authentication, authorization and accounting (AAA) information in Long-Term Evolution (LTE) and IP Multimedia Systems (IMS) networks. Ribbon offers a Diameter Signalling Controller DSC 8000.
What port does diameter use?
3868
Diameter Applications can extend the base protocol by adding new commands, attributes, or both. Diameter security is provided by IPsec or TLS. The IANA has assigned TCP and SCTP port number 3868 to Diameter, as stated in section 11.4 of RFC 6733.
What is the formula of diameter and radius?
The formula for the radius can be written as r=d2, and the formula for diameter can be written as d=2r.
What is the SI unit of diameter?
The units of a linear measurement, such as diameter, are reported in meters. The value may also be reported in different derivations of the meter depending on the object being measured, including millimeters, centimeters and kilometers.
What are the requirements for the Diameter protocol?
When combined with the Diameter Base protocol, Transport Profile, and Extensible Authentication Protocol specifications, this application specification satisfies typical network access services requirements. Initial deployments of the Diameter protocol are expected to include legacy systems.
What is an AVP in the Diameter protocol?
Attribute-Value Pair (AVP) The Diameter protocol consists of a header followed by one or more Attribute-Value-Pairs (AVPs). An AVP includes a header and is used to encapsulate protocol-specific data (e.g., routing information) as well as authentication, authorization, or accounting information.
Is the IETF a product of the Internet?
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741 .
What is the diameter base protocol in RFC 6733?
This document specifies the message format, transport, error reporting, accounting, and security services used by all Diameter applications. The Diameter base protocol as defined in this document obsoletes RFC 3588 and RFC 5719, and it must be supported by all new Diameter implementations.
