Date: Sun, 30 Apr 2006 21:32:35 -0500 From: "J. Buck Caldwell" <freebsd@bitparts.org> To: freebsd-pf@freebsd.org, freebsd-net@freebsd.org Subject: ALTQ on GIF Interface - how much trouble to impliment? Message-ID: <44557343.3070805@bitparts.org>
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I'm in desperate need to do some traffic prioritization using pf and
ALTQ over a GIF tunnel. I asked this question some time ago on
freebsd-stable, and was told to use tags - but either I'm doing it
wrong, or it just doesn't work (probably, I'm doing it wrong). Either
way, supporting ALTQ over GIF would be a far preferable solution.
Here's the problem. I have a corporate office with a 4.5mb/sec
connection, and several branches with 3m-down/768k-up cable connections.
Each endpoint has a FreeBSD 5.4 or 6.x (migrating all to 6.x) box
providing NAT, DNS, DHCP etc - and connecting to the other endpoints via
GIF tunnels, encrypted point-to-point with IPSec. While prioritizing the
actual tunnel traffic (via "pass out quick on $ext_if queue(gif_out,
pri_out) proto { ipencap, esp } all keep state") does actually send the
GIF/IPSEC traffic out at a higher priority, what I need to do is to
actually prioritize the traffic inside the tunnel.
For example - the tunnel carries between the branches and the corporate
office, such as Lotus Notes, telnet/ssh sessions, and database queries.
What I need to do is prioritize the traffic so that, say, Notes traffic
goes out before Web traffic, but the database traffic is highest
priority (just under empty ACKs and such).
Currently, ALTQ support is not available in the GIF interface driver.
How difficult would it be to implement? I've done a little reading of
the man pages and source code, and while I am a decent Windows
programmer (C, not visual basic, get that look off your face), I've
never done any coding for FreeBSD, and wouldn't know quite where to start.
If this is something that can be done relatively easily, I would be
willing to test, and possibly to help code, but I'll need pointers.
Otherwise, I'd love to get some help on figuring out how tagging works
so I can get it operating correctly.
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