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[altq 310] Re: Ingress traffic shaping?
> Unfortunately the config yields 61.83K/sec on Input traffic (i.e. no
> discernible shaping).
> Changing the root interface speed from 1024kbs to 961kbs (roughly 90%) did
> nothing for the 'incoming' data rate (OK, it made it go from 61.83K/sec to
> 61.78K/sec - not much!)
Just curious, did you try shaping the input traffic using the ALTQ
traffic conditioner? It allows you to drop incoming packets
according to some rules. It is not a queuing discipline like
CBQ so you can't borrow bw if it's available. I notice you
haven't permitted borrowing on either CBQ class anyway, so
why not try using the token bucket meter as a traffic shaper?
> Downside is that I have to run two instances of probes/monitors etc. to watch
> things, but it works...
Yeah, that is somewhat of a nuisance.
> I've not had time to actually look at the traffic going through this system -
> I will if I get more time...
> Thanks to all who suggested fixes / ideas,
> My final question is - can anyone see anything "bad" with this set-up? i.e.
> 'very' inefficient? Likely to cause problems etc?
Not really. MRTG would be useful for long-term monitoring of the link.
It requires some hacking of cbqprobe and cbqmonitor but it could
payoff. I've done it and I ought to clean it up and make it
available to Kenjiro (along with some other stuff). I've set it up so
I can select and observe per-class throughput in bps and packet count on
any CBQ-enable i/f. Would you find something like this useful?
With MRTG I noted periodic outages of ALTQ CBQ forwarding service
on a 30Mbps TCP flow over a 24 hour period that K.C's latest patch is
supposed to fix.
> The machine running this is quite fast (P2-450), with three fxp's - so
> shouldn't be a problem? :)
No, especially at the very low traffic rates you are dealing with.
I have a mix of PCs. One is an old P.Pro 200 with 3 x OC-3
ATM cards configured as a Diffserv interior router. I haven't
observed any performance degradation due to traffic load on it yet.