ipprecedence

[Michael Sierchio]

Eugene Grosbein wrote:

> Then, if prioritized packed arrives when FIFO is not empty,
> it will not be allowed to go out before packets without ipprecedence
> that are already in FIFO. That's bad.

That's not quite right.  The prioritized packet will presumably be
handled by a different (dummynet) queue, and that queue will have
a higher weight than the other queue (for lower priority traffic).

Luigi will correct me if I'm wrong, but it's probably important
to keep the high-priority VoIP queue small -- either in bytes or
packets, representing the actual bandwidth.  This will cause he
WFQ to kick in.

Because of fairness, it won't *prevent* low-priority packets
from being transmitted -- and that's important, since queueing
systems can suffer horrible locks from a small amount of
traffic otherwise -- but it should accomplish your goal.

Tuning is your job, though, Zhenya. ;-)