[Codel] Using fq_codel queuing on backbone routers

Eric Dumazet eric.dumazet at gmail.com
Thu Jan 3 12:57:46 EST 2013

On Thu, 2013-01-03 at 17:49 +0000, Alessandro Bolletta wrote:
> Hi everybody,
> I read in the main wiki page that CoDel doesn’t work as it should on
> heavy loaded environments as, for example, backbone routers, right?
> Well, we’d like to make some test on our core mesh-to-fiber gateway
> when we’ll get our fiber connection but it isn’t too much clear what
> did you mean in wiki.
> For example: do you think that fq_codel will be able to manage
> thousands flows correctly on core router connected to a 1Gbit
> symmetric fiber link?

Of course it will be able to manage this workload on current hardware.

It adds a small overhead compared to a mere fifo. I guess you already
use a complex qdisc hierarchy anyway, so you'll hardly notice a
performance impact at all.

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