Re: [LARTC] Classes do not receive any traffic ?

From: bartekR <bojleros@poczta.fm>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] Classes do not receive any traffic ?
Date: Sat, 08 Sep 2007 08:06:52 +0000	[thread overview]
Message-ID: <46E2581C.5090401@poczta.fm> (raw)
In-Reply-To: <46DC12F3.6010101@poczta.fm>

Andy Furniss wrote:
> If your config looks OK your rules are so complex I would try something 
> very simple like marking icmp and making a filter for that on eth/imq 
> and seeing if it works or not.

I have built simple script and as You wrote it worked. After this I have 
modified mine script by:

-removing lines containing -j CONNMARK and line matching non zero mark.
-changing a few returning lines in _SKYPE

Now every classes receive traffic as it should and ping decreased 
significantly.

Andy Furniss wrote:
> DSl rates are hard to get right without patching tc/kernel as it uses 
> ATM and the overheads on a packet are high and vary with size in 53byte 
> chunks. Without patching you need to back off from the rates.

I didn't knew that. Would You give me larger information about this ??

Andy Furniss wrote:
> To make things worse ingress shaping needs you to back off even more as 
> you are at the wrong end of the bottleneck, so don't have total control 
> like on egress. The slower the link the harder it is, you should use 
> short child qdiscs on the htb bulk classes (limit parameter) and try to 
> arrange the htb rules so that interactive classes (and don't have too 
> many) get a rate much higher than they ever need with a higher prio than 
> bulk.

I will try things as You mentioned.

I have 3 interactive classes because of Skype and p2p. I had tried to 
match Skype file transfers to user classes. Unfortunately Skype 
connections are encrypted. Mine first idea was to mark this packet by 
matching tos (similar to matching tos of ssh and scp) but it failed 
because Skype always send packet with tos=0. Is there any other way to 
do that ??
Sometimes p2p puts lots of ack packets. I don't want them to interfere 
with low latencies needed for games.

Thank You for Your help.
Especially I appreciate Your will to read and understand mine first 
,very long and complex post :)

Bartek

----------------------------------------------------------------------
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