Hey Nickola,
Yep, this surely is a feature/bug of tc which deems clarification. Hope
someone can come around with a fix for the same.
As for your setup, can i humbly request you to send across the script
such that i can test the same on my setup.....that is if you don't mind.
Also, i was under the presumtion that flowid was used only when iptables
is used to mark these outgoing packets.
Since i don't use iptables i have stuck to plain u32 filters. Lemme
know Nickola and i will try changing the classid to flowid and give this
one a shot.
Any points at optimising the same folks???.
Trevor
On Mon, 2003-06-23 at 02:47, Nickola Kolev wrote:
> Hey again, Trevor,
>
> [ cut ]
> : Thanks for the prompt reply. Am indeed glad that htb scales to my
> : enterprise requirements. I have performed tests on my Athlon 1.7Ghz but
> : still use my dell latitude for r and d.
>
> I also changed a bit my testbed, just to overclock the CPU to 863MHz (though
> it is the same Duron@xxx) and to add some 256MB of RAM, which totals 512.
>
> [ cut ]
> : I have tested the same time and again and am convinced this issue needs
> : to be clarified on.
>
> Obviously, and you'll see I'm backing you later on.
>
> : * Uptill 2000 U32 Filters and htb classes everything is fine
> : * Above 2000....i am very clear that probably htb classes formation
> : happens seamlessly but U32 filters stat throwing some stupid errors.
>
> In my test, tc started throwing errors at u32 filter, attached to classid 2048
>
> tc filter add dev eth0 parent 1:0 protocol ip u32 match ip dst \
> 192.168.20.48/32 classid 1:2048
> RTNETLINK answers: File exists
>
> I'm not sure if htb classids (or better u32 classids) are limited to 2048 (dec),
> which equals 800(hex). I'm sorry, but I can't read sources, otherwise I could
> peek into Martin Devera's work to search for an answer.
>
> : * "RTNETLINK answers: No such file or directory" thrown up for filters
> : greater than 2000. Not exactly sure on which number...but very surely
> : above 2000.
>
> In my case, tc answered "RTNETLINK answers: File exists" after adding u32
> classifier to classid 2048. This is probably not the case, because in
> my production setup, I have classids much higher than 2048, e.g.:
>
> tc class add dev eth0 parent $HOME64_CLASS classid 1:14116 htb \
> rate $HOME64_CHILD ceil $HOME64_SPEED burst 12k quantum 1514
> tc filter add dev eth0 protocol ip parent 1:0 prio $HOME64_PRIO u32 \
> match ip dst 10.10.8.79 flowid 1:14116
> tc qdisc add dev eth0 parent 1:14116 handle 14116: sfq quantum 1514b perturb 10
>
> here HOME64_CHILD, HOME64_SPEED and HOME64_PRIO are variables, taking
> part in the script.
>
> : Any idea on whats wrong with my setup. Does this necessitate change in
> : use of U32 filters. Can this be avoided???. Or am i on the wrong
> : track???.
>
> Keeping in mind I wrote the above, I notice that I'm using a bit
> different sintax, i.e. attaching u32 classifiers to "flowid", not to
> "classid", as in your setup. But nevertheless, the resulst is a
>
> RTNETLINK answers: File exists
>
> : Any pointers towards resolving the same will be appreciated. Am
> : attaching the 4000 approx user script along.
>
> Personally I can't help, obviously. Am I missing something? I tend to
> be erroneous, but this is beyound the scope of my knowledge. ;)
>
> Martin Devera? Stef Coene? Martin Brown? Leonardo Baliache?
>
> Well, If I missed someone more deep-in-this-stuff, please, excuse me,
> but I would also be very interested in clarifying this.
--
( >- GNU/LINUX, It's all about CHOICE -< )
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