Are tlp weak for big traffic?

Hello,

I'm using COBALT Cache RaQ 2 with 256MB RAM running
NetBSD/cobalt 4.99.4
as a NAT router in my room. The outline of my use is like
this:

   -----------+----------- main stream (connected to the
Internet)
              |tlp0        OCN registered /29 network
            +-+-+  
            |RaQ|  NAT
            +-+-+  /
              |tlp1
     ---+-----+----------- private subnet (testing network,
192.168.1.0/24)
      +-+-+
      |P C|
      +-+-+

Here, when I download large files such as iso images of
NetBSD or Solaris
Express on PC, the traffice rate at tlp0 and tlp1 decreases
and finnally
it becomes zero. And the PC gets offline.

My assumption is following. What is the possibility?

1. RaQ 2 is too slow to handle large traffic.
2. The HUB I'm using on private subnet is too weak.
3. tlp(4) has some problem.
4. other

If 3 is the true reason, what shoud I do to debug or improve
it? Do I have
to show more information about my RaQ2?
-- 
NAKAJI Hiroyuki

Hi,

Reason #1 should be brushed away. This box is not that slow.
Just keep 
an eye on the processes and the memory usage during
transfers. Any 
unusual CPU% or memory consumption surges should raise a
flag.

Reason #2 must be tested and this is easy to do: just bypass
the hub by 
connecting your PC directly to tlp1 with a cross-over cable.

Then you will be down to #3 and on.

Hope this helps.

--
Vadim P.



NAKAJI Hiroyuki wrote:
> Hello,
>
> I'm using COBALT Cache RaQ 2 with 256MB RAM running
NetBSD/cobalt 4.99.4
> as a NAT router in my room. The outline of my use is
like this:
>
>    -----------+----------- main stream (connected to
the Internet)
>               |tlp0        OCN registered /29 network
>             +-+-+  
>             |RaQ|  NAT
>             +-+-+  /
>               |tlp1
>      ---+-----+----------- private subnet (testing
network, 192.168.1.0/24)
>       +-+-+
>       |P C|
>       +-+-+
>
> Here, when I download large files such as iso images of
NetBSD or Solaris
> Express on PC, the traffice rate at tlp0 and tlp1
decreases and finnally
> it becomes zero. And the PC gets offline.
>
> My assumption is following. What is the possibility?
>
> 1. RaQ 2 is too slow to handle large traffic.
> 2. The HUB I'm using on private subnet is too weak.
> 3. tlp(4) has some problem.
> 4. other
>
> If 3 is the true reason, what shoud I do to debug or
improve it? Do I have
> to show more information about my RaQ2?
>   

nakajikankyo-u.ac.jp wrote:

> If 3 is the true reason, what shoud I do to debug or
improve it? Do I have
> to show more information about my RaQ2?

Maybe more info about statistics (systat vmstat, vmstat -i,
ipfstat,
or any kernel messages on console) might help.

BTW, does it also happen on GENERIC kernel?
---
Izumi Tsutsui

NAKAJI Hiroyuki wrote:

> Here, when I download large files such as iso images of
NetBSD or Solaris
> Express on PC, the traffice rate at tlp0 and tlp1
decreases and finnally
> it becomes zero. And the PC gets offline.
> 
> My assumption is following. What is the possibility?
> 
> 1. RaQ 2 is too slow to handle large traffic.
> 2. The HUB I'm using on private subnet is too weak.
> 3. tlp(4) has some problem.
> 4. other

As a guess, I'd go with 5. ISP is limiting large downloads
(and screwing 
it up), but I'd verify that with my ISP.

If you can, you could borrow/buy an off the shelf NAT device
to take the 
RAQ out of the path and see if anything changes.

Robert



-- 
Robert Thille                7575 Meadowlark Dr.;
Sebastopol, CA 95472
Home: 707.824.9753    Office/VOIP: 707.780.1560     Cell:
707.217.7544
rthillemirapoint.com    YIM:rthille     http://www.rangat.org/r
thille
Cyclist, Mountain Biker, Freediver, Kayaker, Rock Climber,
Hiker, Geek
May your spirit dive deep the blue, where the fish are many
and large!

On 12/8/06, NAKAJI Hiroyuki <nakajikankyo-u.ac.jp> wrote:
> Hello,
>
> I'm using COBALT Cache RaQ 2 with 256MB RAM running
NetBSD/cobalt 4.99.4
> as a NAT router in my room. The outline of my use is
like this:
>
>    -----------+----------- main stream (connected to
the Internet)
>               |tlp0        OCN registered /29 network
>             +-+-+  
>             |RaQ|  NAT
>             +-+-+  /
>               |tlp1
>      ---+-----+----------- private subnet (testing
network, 192.168.1.0/24)
>       +-+-+
>       |P C|
>       +-+-+
>
> Here, when I download large files such as iso images of
NetBSD or Solaris
> Express on PC, the traffice rate at tlp0 and tlp1
decreases and finnally
> it becomes zero. And the PC gets offline.
>
> My assumption is following. What is the possibility?
>
> 1. RaQ 2 is too slow to handle large traffic.
> 2. The HUB I'm using on private subnet is too weak.
> 3. tlp(4) has some problem.
> 4. other
>
> If 3 is the true reason, what shoud I do to debug or
improve it? Do I have
> to show more information about my RaQ2?

I've set up my Cobalt to be a gateway/pf firewall just the
other day.

I have a similar setup except:

o I'm using a Qube2
o I'm using NetBSD 3.1
o My tlp0 is connected to a wireless game adapter which
connects to a
wireless router. That router then connects to my cable
modem.

I'm downloading the NetBSD live CD right now, and it has
been steady
around 300KB/sec for about 10 minutes. I'm downloading on a
PC which
is on the tlp1 NAT private network.

I don't think there is a big difference between our
machines.

Andy