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What Origin-State-Id AVP signifies with the value "0" ?

+2 votes
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Can someone please explain, what is the significance of "0" and non"0" value of Origin-State-Id AVP in a diameter message ?

posted Dec 21, 2014 by Vikram Singh

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3 Answers

+2 votes

When Origin-State Id is set to 0, in that case the node signifies that it will not support the intimation of restart of that node. However if that value is set to a non zero value in that case it signifies that it supports such feature.

The value communicated during the CER if incremented due to the restart of the diameter node in any subsequent intimates the other node that the node has been restared and it can clear the session created previously.

answer Dec 21, 2014 by Peeyush Sharma
+2 votes

On behalf of Bart -

Value of this avp tells if the state of peer has changed or not. It could be due to connection/session break or in case the peer was rebooted.

Value is incremented, to tell the far end that all of the connections/sessions are no longer valid.

Hope this helps

answer Dec 22, 2014 by Salil Agrawal
0 votes

Just adding specific info from the RFC 3588 sec 8.

When a Diameter server receives an Origin-State-Id that is greater
than the Origin-State-Id previously received from the same issuer, it
may assume that the issuer has lost state since the previous message
and that all sessions that were active under the lower Origin-State-
Id have been terminated. The Diameter server MAY clean up all
session state associated with such lost sessions, and MAY also issues
STRs for all such lost sessions that were authorized on upstream
servers, to allow session state to be cleaned up globally.

The Origin-State-Id AVP also present in Device-Watchdog Answer sent in response to Device-Watchdog Request.

If the value is ZERO means no reboot happened or u can say no restart happened.

answer Oct 22, 2016 by Sanjeet Singh
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