On May 21, 2015, at 4:17 PM, Nick Lowe <nick.lowe@gmail.com> wrote:
That -isn't- explicitly stated, it is saying that they should be sent to mark the start or end of accounting - that's not tied to only a startup, a reboot or a shutdown. The spec uses those as examples of when it is appropriate. It doesn't say they are the only times that they can be sent.
If you're going to interpret text as saying the *opposite* of what it says, you can justify anything.
The spec does not prohibit WLAN vendors scoping the start or end of accounting with a Calling-Station-Id so some seem to have taken that liberty, and send these on a per-BSS basis and not on a per-NAS basis.
The specs don't prohibit all kinds of idiotic behaviour. Because, as I said, the authors didn't think that simple text could be misunderstood. Alan DeKok.