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Is it necessary a Diameter node should have information of its possible peer even before getting CER message ?

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In one Diameter blog, I saw a statement in which mentioned, if a Diameter node receive CER from unknown peer it responds back to that peer with Result-Code AVP set to "DIAMETER_UNKNOWN_PEER".
Now my query, Does a Diameter node keep its potential peers information in advance ?

posted Mar 22, 2016 by Harshita

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2 Answers

+1 vote

Yes the information is needed to establish a TCP connection. Other node should have prior info from where it has to receive a message. Also we know TLS is supported with DIAMETER so in that case also it will help

answer Mar 22, 2016 by Peeyush Sharma
Thanks Peeyush for your input but my question is "Does the sever has information of client like  "Orgin-Host" or "Origin-Realm" in advance ?". For the transport connection  I agree TLS will be used. My question is more about Diameter level rather than transport level.
Yes, server has the information about the client like its realm and hostname.
0 votes

There are two methods how diameter peers can configured:

  1. Diameter Peer entries are manually configured for peers.
  2. Service aware peer discovery.

In first method, peers are configured manually so that they would know each others identity.

In the second method, a peer broadcast SVC enquiry to identify the peers and respective services supported by them. After getting information about the peers, diameter peer initiate usual CER flows.

answer Apr 20, 2017 by anonymous
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