Date: Sat, 15 Oct 2005 16:39:37 +0200 From: Max Laier <max@love2party.net> To: freebsd-pf@freebsd.org Cc: Brian Fundakowski Feldman <green@freebsd.org> Subject: Re: ALTQ and PPP access concentrator Message-ID: <200510151639.51156.max@love2party.net> In-Reply-To: <20051015142431.GC14542@cell.sick.ru> References: <20051015142431.GC14542@cell.sick.ru>
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On Saturday 15 October 2005 16:24, Gleb Smirnoff wrote:
> I've got two problems when running ALTQ on PPP access
> concentrator. May be you have ideas on how to solve them
> in a nice way.
>
> - When pf.conf is parsed at boot time, the p2p interfaces
> (ng_iface(4) in my case) do not exist, so the ALTQ queues
> are not created. The PPP software (mpd in my case) usually
> starts at later stage of boot. Moreover, some programs like
> ppp(8) create interfaces dynamically, not at boot time.
>
> - The PPP access concentrator may have a lot of interfaces.
> Why isn't it possible to specify same ALTQ policy on all
> interfaces of given type, like this:
>
> altq on ng* priq bandwidth 56Kb queue { cvsup def dns ack ssh }
>
> Instead, one needs to copy and paste a lot of lines differing
> only in interface unit number.
I agree that ALTQ configuration (esp for big setups) has some limitations and
gotchas as is. I'd like to take the opportunity to start a discussion about
what features are required to make it more useable. It is certainly
interesting to look at decoupling /dev/pf and altq configuration. The end
result would be a (in-kernel) lookup service that allows pf (or any other
end-user of ALTQ) to lookup QIDs by interface:qname. In order to keep things
in sync I am thinking of a eventhandler of some kind.
This would allow us to keep the inlined configuration as it happens right now
(just a little rewriting in pfctl), but enable easy changes for interfaces
coming late. mpd would just trigger necessary altq-configuration from its
UP-script.
I talked about this with green some time ago - CCed.
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