LARTC - Dec 2002 - Fwd: Re: HTB with SFQ in leaf classes. & setup question

Stef Coene <stef.coene@docum.org>:
> On Tuesday 10 December 2002 19:48, lartc@e-apollo.lv wrote:
> > Hello,
> >
> > I wrote something yesterday.
> > Now the situation is even worse. Communicatin with some clients wont
work
> > at all until i restart the traffic shaping box.
> > (It works for some hours, then suddenly dies (meaning the client cant
be
> > pinged. Suspected at peak hours)
> > Maybe the computer resources are weak, maybe its setup faulty
> Do you have any errors in dmesg?  And how is the memory and cpu usage ?
Right now (night) the traffic shaping box is not loaded at all 10% cpu usage and
200MB ram
used.
Tho at the daytime cpu usage goes up to 70% or so. and ~ 500MB ram.

Yes there are errors.

Dec 10 22:59:28 p1 kernel: NET: 26 messages suppressed.
Dec 10 22:59:28 p1 kernel: HTB: bad diff in events, cl=10243 diff=19E26000
now=434192384
then=4294893568 j=1101578
...

Like this.

Just before i left work, i left a file d/ling, to test what happens.
Right now i cant reach outside world from that computer (128MB with speed of
128kbit/s have
downloaded and it has halted).

I can reach the computer from the computer where the traffic shaping is being
done. But not
from a computer which is a hop from traffic shaping computer

internet - router1 - traffic_shaping - ... - me

80.81.33.1 is the router1 at the ISP providing us 8mbit like.
It cant be reached from the box which was being shaped.

me@myplace$ ping 80.81.33.1
PING 80.81.33.1 (80.81.33.1): 56 octets data

--- 80.81.33.1 ping statistics ---
3 packets transmitted, 0 packets received, 100% packet loss

Tho it can be reached from box next to me. (my other workstation)
me@myotherpc$ ping 80.81.33.1 
PING 80.81.33.1 (80.81.33.1): 56 octets data
64 octets from 80.81.33.1: icmp_seq=0 ttl=252 time=62.6 ms
64 octets from 80.81.33.1: icmp_seq=1 ttl=252 time=20.8 ms

--- 80.81.33.1 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 20.8/41.7/62.6 ms

So there is a problem in the traffic shaping box.
Traceroute also stops at the traffic shaping box.

Huge problem.

Ok, just a second ago i did ''/sbin/tc qdisc del dev eth2 root''
And added the classes again.

me@myplace$ ping 80.81.33.1
PING 80.81.33.1 (80.81.33.1): 56 octets data
64 octets from 80.81.33.1: icmp_seq=0 ttl=252 time=24.6 ms
64 octets from 80.81.33.1: icmp_seq=1 ttl=252 time=21.9 ms

--- 80.81.33.1 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 21.9/23.2/24.6 ms

I can reach ISP''s gateway very smoothly now!


Any idee?


P.Krumins
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On Tue, 10 Dec 2002 23:27:39 +0200
lartc@e-apollo.lv wrote:
> Ok, just a second ago i did ''/sbin/tc qdisc del dev eth2
root''
> And added the classes again.
> 
> me@myplace$ ping 80.81.33.1
> PING 80.81.33.1 (80.81.33.1): 56 octets data
> 64 octets from 80.81.33.1: icmp_seq=0 ttl=252 time=24.6 ms
> 64 octets from 80.81.33.1: icmp_seq=1 ttl=252 time=21.9 ms
> 
> --- 80.81.33.1 ping statistics ---
> 2 packets transmitted, 2 packets received, 0% packet loss
> round-trip min/avg/max = 21.9/23.2/24.6 ms
> 
> I can reach ISP''s gateway very smoothly now!
Hello, I''m running a similar setup with about a thousand clients,
separated in several level
 hierarchy. The machine is also similar. I had the same problem half a year ago.

Anyway, can you tell us what is the version of htb? It''s htb2,
isn''t it? Try upgrading to htb3, this
will solve your problem. If not, just put a crontab job to restart (i.e. delete
and the recreate)
the htb classes every 1/2 hour.

Hth,
Nickola

Nickola Kolev <nikky@mnet.bg>:
> On Tue, 10 Dec 2002 23:27:39 +0200
> lartc@e-apollo.lv wrote:
> 
> > Ok, just a second ago i did ''/sbin/tc qdisc del dev eth2
root''
> > And added the classes again.
> > 
> > me@myplace$ ping 80.81.33.1
> > PING 80.81.33.1 (80.81.33.1): 56 octets data
> > 64 octets from 80.81.33.1: icmp_seq=0 ttl=252 time=24.6 ms
> > 64 octets from 80.81.33.1: icmp_seq=1 ttl=252 time=21.9 ms
> > 
> > --- 80.81.33.1 ping statistics ---
> > 2 packets transmitted, 2 packets received, 0% packet loss
> > round-trip min/avg/max = 21.9/23.2/24.6 ms
> > 
> > I can reach ISP''s gateway very smoothly now!
> 
> Hello, I''m running a similar setup with about a thousand clients,
separated
> in several level
>  hierarchy. The machine is also similar. I had the same problem half a year
> ago.
> 
> Anyway, can you tell us what is the version of htb? It''s htb2,
isn''t it? Try
> upgrading to htb3, this 
> will solve your problem. 
No, it''s htb3.6_2.4.17.diff
HTB 3.6
Tho it''s made for 2.4.17 kernels, i am running 2.4.19.

If not, just put a crontab job to restart (i.e.
> delete and the recreate) 
> the htb classes every 1/2 hour.
Yes, i just did it. I hope 1/2 hour is reasonable interval.
Will see what the clients gonna do tomorro.

Btw, how do you solve this problem?

I am about to test it more with 2.4.20 (HTB included) on Sunday


P.Krumins
 ____________________________________________________________
 
 Reģistrē un lieto savu Apollo e-pastu www.e-apollo.lv
 
 www.apollo.lv

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On Tue, 10 Dec 2002 23:58:03 +0200
lartc@e-apollo.lv wrote:

[cut]
> > Anyway, can you tell us what is the version of htb? It''s
htb2, isn''t it? Try
> > upgrading to htb3, this 
> > will solve your problem. 
> 
> No, it''s htb3.6_2.4.17.diff
> HTB 3.6
> Tho it''s made for 2.4.17 kernels, i am running 2.4.19.
[cut]

Hmpf, strange. I''m really sorry that I didn''t test and debug
this when it was
happening, but this is a production machine and I had to find a solution fast.
But now I''m rid of it (after upgrading to htb3 in may).

[cut]
> > delete and the recreate) 
> > the htb classes every 1/2 hour.
> 
> Yes, i just did it. I hope 1/2 hour is reasonable interval.
> Will see what the clients gonna do tomorro.
> 
> Btw, how do you solve this problem?
> 
> I am about to test it more with 2.4.20 (HTB included) on Sunday
[cut]

Don''t worry, half an hour is quite reasonable. :)

And about the solution... emmm... I just upgraded, that''s all.


Nickola