question on algorithm for radius based accouting
alex at corp.nac.net
Fri Aug 17 03:52:34 UTC 2007
> My question is: what's the best algorithm for
> constrcting broadband access record from radius
> accouting packets?
Read the RFC. No, I am being serious.
> Record Accouting-on packet arriving time ->
> record Accouting-Off packet's Acct-Session-Time
> and Acct-Delay-Time ->
> The Log-off time is calculated as:
> Accouting-on time + ( Acct-Session-Time -
Or, take the acct record from logoff, and:
(time stop acct record rec'd) - (acct-delay-time)
Either will work. However, it's somewhat more common to do what I
> Log-on time is calculated as:
> Accouting-off arriving time - ( Acct-Session-Time -
> Are the two methods have the same effect on
> calculating result? If radius packets were sent to
> two accouting systems simulataneusly, while the two
> system takes the different algorithm, will there be
> any difference between the result of accouting ?
They should yield (approximately) the same result. But, to be pedantic,
you haven't accounted for latency within the network.
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