Date: Sun, 1 Oct 2006 20:17:21 +0200 From: Ulrich Spoerlein <uspoerlein@gmail.com> To: stable@freebsd.org Cc: net@freebsd.org Subject: altq on tun0: queueing works, prioritization not? Message-ID: <20061001181720.GD1365@roadrunner.q.local>
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Hello all,
I tried to set up TCP ACK prioritization with pf/altq as has been
described on various places of the internet.
It doesn't work as expected. I have a 16Mb/1Mb DSL link, the modem is
connected to a dc(4) device, I'm working with the tun0 device for my
firewall rules. Here they are:
ext_if="tun0"
scrub in all
altq on tun0 priq bandwidth 400Kb queue { std, http, ssh, dns, tcp_ack }
queue std priority 1 priq(default)
queue tcp_ack priority 6
pass out on $ext_if proto tcp from any to any queue(std, tcp_ack)
Please note that I tried various bandwidth settings, for testing
purposes I set it to a very very low 400kb.
When downloading from ftp.de.freebsd.org, I'm able to achieve roughly
950kB/s. If I then start an FTP upload (which will reach some 42kB/s, so
the 400kb bandwidth is in effect), the interface throughput drops down
to a mere 120kB/s.
The 400kb limit should also be low enough, as I'm able to upload to that
same ftp with up to 100kB/s if I turn off queueing.
This is definitely not what I would expect. Where is my error?
Ulrich Spoerlein
--
A: Yes.
>Q: Are you sure?
> >A: Because it reverses the logical flow of conversation.
> >>Q: Why is top posting frowned upon?
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