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What is Diameter base protocol?

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 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.

What is the difference between Radius and Diameter protocol?

Radius is a connectionless protocol, so it do not need any session creation before its operation. But Diameter is a connection oriented like TCP. As a transport protocol, Radius uses UDP (User Datagram Prtocol) and Diameter uses TCP (Transmission Control Protocol) or SCP.

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.

How does diameter protocol work?

Diameter is a Authentication Authorization and Accounting (AAA) protocol. It works on the Application Layer if we consider OSI Layered model. Diameter is a message based protocol, where AAA nodes exchange messages and receive Positive or Negative acknowledgment for each message exchanged between nodes.

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.

How does Diameter protocol work?

What port does diameter use?

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.

Is diameter better than radius?

➨In summary, Diameter protocol provides better transport, better proxying, better session control and better security compare to Radius protocol. This differentiates diameter and radius protocols.

Is Diameter UDP or TCP?

What is Diameter peer?

When representing a Diameter Node, a Peer Node is an external Diameter client, server, or agent with which the application establishes direct transport connections. …

What is the Diameter protocol and what does it do?

What is Diameter Protocol? 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. It was derived from and improves upon the widely deployed RADIUS (Remote Authentication Dial-In User Service)

How does the diameter base protocol support roaming?

Diameter base protocol defines the network nodes to support a big network based on diameter protocol. As diameter supports roaming, there are nodes in the roaming network those need to talk servers or nodes in-home network. Relay Agents forwards messages from source to destination without inspecting the message.

What is diameter and what is SIP used for?

Diameter and SIP (Session Initiation Protocol) are the core signaling protocols used in IMS networks. SIP is used to establish and control real-time IP communications sessions.

Why is diameter reporting an error to the client?

While diameter reports an error to the client. There are two types of errors in the Diameter protocol. Application-level error, these are permanent errors, the server responds with error in ResultCode AVP. Protocol level error is because of the wrong message according to the protocol, e.g missing a mandatory AVP.