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From: "Eugene M. Zheganin" <emz@norma.perm.ru>
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Hi.

Is ECN implemented in FreeBSD ?
What do I need to turn it on ? Does it work in conjunction with fp/RED ? 
I see sysctl oid, but I have a strong impression that it should be used 
with pf. On the other hand, I have a working set of HFSC queues - do I 
need to turn on this sysctl oid ?

Thanks.
Eugene.