I am accounting all vpdn connections using free radius against an Oracle database. I am getting duplicate accounting records for the same session with different Acct-Delay-Time time (0,5,10) :
1. What causes these duplicates and can they be avoided?
Here are some that could be the cause:
- the NAS is sending retry packets too fast
- the radius server takes too long to process the packets and send an Ack back the to NAS
- the network between the NAS and the radius server can't handle the load
- bug in the NAS
2. When doing accounting, should I process the records with Acct-Delay-Time=0 only?
I would say it doesn't really matter, as long as you have at least one of them, you have all necessary session data.
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