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What is Diameter protocol?

I have 3 simple questions.

  • What is the Diameter protocol in a simple explanation?
  • Why is it used?
  • How can I use it?

I searched the network for a practical explanation, but could not find it. All that is is some kind of technical blaber.

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4 answers

I found this full Diameter protocol article written on the IBM website.

Introduction

Diameter RADIUS , , , (AAA). Diameter IMS IMS , . IMS , Diameter IMS. . , AAA IMS, Diameter, .

, IP-, , , -. RADIUS ( ) ; , , . Diameter .

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RADIUS ( ). , . RADIUS - , ( , AAA). RADIUS :

UDP - RADIUS . /. , (VSA)

Livingston, / Portmaster. (, ... ...) , 19.2Kb UUCP .

. -, TCP. . , " ". . , TCP, ( AVP). , /.

, DIAMETER < , , /. , , AAA, (, ). , , -, AAA /, .

?

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IBM " ", , Ciscos ", " Diameter, RADIUS.

  • " , , , ".... " - AAA () RADIUS".

  • " RADIUS , NAS RADIUS". ( NAS , , .)... " , RADIUS ". RADIUS ( , , ..), " " (VSA) , ( ) RADIUS, (, 253 ). , Diameter? ( , , ), ( "32- " ), ( TCP STCP, , ) " " ) ..

  • FreeRADIUS FOSS RADIUS, , (, Wi-Fi 802.1 X ) , FreeDiameter - FOSS Diameter, . TMCNews " IMS" (2007) , "Diameter 3GPP IMS, ", , Diameter. , Diameter, , " RADIUS, " (Cisco) " " ( IBM). , FreeDiameter "RADIUS/Diameter extensible gateway" (app_radgw.fdx), " RADIUS Diameter". , " RADIUS Diameter - . , ".

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- (AAA). , OSI Layered.

AAA: -

, (: -), "AAA", . 1. : , . 2. : , . 3. . .

, , , AAA.

So, Diameter is basically a message-based protocol where the AAA procedure can be executed, and the AAA nodes exchange messages and receive positive / negative acknowledgment for each message exchanged between the nodes.

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