Radius Control Agent (RCA) Access-Accept Message Contains Event-Timestamp from the Past
(Doc ID 1357588.1)
Last updated on JANUARY 30, 2022
Applies to:Oracle Communications Network Charging and Control - Version 4.0.0 and later
Information in this document applies to any platform.
When Radius Control Agent (RCA) receives two consecutive packets on the same conversation having the same identifier field, RCA considers the second packet as a resend of the first one, and resends the same response. The correct behavior is that a packet resend is a packet that has the same source IP address, source port and identifier and which is sent within a short time frame from the previous packet (usually between 5 to 30 seconds).
Below is a diagram showing this scenario:
In the above example, the first two Access-Request messages received a correct response from the Radius Control Agent (RCA). The third Access-Request, however, was considered by RCA as a resend of the second Access-Request message and RCA responded with the same Access-Accept message, which is wrong.
Below is an extract from a snoop trace, showing more details about the parameters in each message in the above diagram:
1- Access-Request (id=176):
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