Bug 55627 - Slows network when loaded
Summary: Slows network when loaded
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: rp-pppoe
Version: 7.2
Hardware: i586
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Than Ngo
QA Contact: Aaron Brown
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2001-11-03 03:07 UTC by Chris Pauly
Modified: 2007-04-18 16:38 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2001-11-05 14:20:02 UTC
Embargoed:


Attachments (Terms of Use)
Configuration file for RP-PPPoE (3.63 KB, text/plain)
2001-11-05 14:16 UTC, Chris Pauly
no flags Details

Description Chris Pauly 2001-11-03 03:07:35 UTC
From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)

Description of problem:
When using RP-PPPoE 3.2-3, upon typing "adsl-start", all network functions 
(ftp and samba in my test case), slow down drastically. RP-PPPoE 2.6-5 
(that comes with RedHat 7.1) does not exhibit this problem, and 
downgrading to this version fixes the problem. The only way i can manage 
to recover from the 3.2-3 slowdown is to reboot.

Version-Release number of selected component (if applicable):
3.2-3

How reproducible:
Always

Steps to Reproduce:
1. Start playing a movie (served up by Samba) on a different computer via 
the network.
2. Type "adsl-start".


Actual Results:  Movie plays fine until a few seconds after adsl-start is 
typed. The movie then stutters constantly and won't play properly until i 
reboot.

Expected Results:  Movie should not stutter.

Additional info:

As i said, RP-PPPoE 2.6-5 that comes with RedHat 7.1, installed onto 
RedHat 7.2, does not exhibit the problem. RP-PPPoE 3.2-3 that comes with 
RedHat 7.2, does exhibit the problem.

Comment 1 Chris Pauly 2001-11-03 07:16:03 UTC
Two points that i want to make clear:

1. By rebooting, i mean that i have to reboot the RedHat box serving the movie 
to solve the problem. Only after a clean reboot without running adsl-start does 
the movie play back smoothly.
2. Not even adsl-stop will fix the network slowdown. Rebooting seems like the 
only way.


Comment 2 Ngo Than 2001-11-05 10:33:13 UTC
strange, i cannot reproduce this problem. it works for me here
please check if you run adsl-start in debugging mode?

How could it work if you only type adsl-start? Do you have DSL configuration
under /etc/ppp/pppoe.conf


i recommend you should use ifup/ifdown to start/stop DSL connection instead
adsl-start/adsl-stop

Comment 3 Chris Pauly 2001-11-05 12:20:50 UTC
adsl-start is not running in debug mode, no.

Yes, i have my configuration in /etc/ppp/pppoe.conf.

I'm not sure how to use ifup/ifdown. I can't seem to find any information on 
it. Could you point me to a resource on the web? Why isn't adsl-start/adsl-stop 
the best way to connect/disconnect? The HOWTO on rp-pppoe's website doesn't 
mention ifup/ifdown at all, only adsl-start.

I don't know what other information i can give you. I just upgraded to rp-pppoe 
3.2-3 to try it again, started playing a movie over the network (it's running 
fine and smooth), typed adsl-start, and within a few seconds my network has now 
slowed to a crawl again, the movie stuttering. I've downgraded to 2.6-5, run 
adsl-start adsl-stop, tried ifdown eth0 then ifup eth0, and the problem 
persists. What else can i try apart from rebooting? By the way, 'top' shows 94-
97% idle CPU time.


Comment 4 Ngo Than 2001-11-05 13:13:59 UTC
we have a new config tool 'redhat-config-network' in 7.2, which allows you to
setup your network/dialup/DSL ...

This new config tool puts all the configuration fies under
/etc/sysconfig/network-scripts/ (for DSL /etc/sysconfig/network-scripts/ifcfg-ppp0)

To start/stop DSL connection just do ifup/ifdown ppp0 

could you please give me your /etc/ppp/pppoe.conf?

Comment 5 Chris Pauly 2001-11-05 14:16:24 UTC
Created attachment 36449 [details]
Configuration file for RP-PPPoE

Comment 6 Chris Pauly 2001-11-05 14:19:57 UTC
I tried the redhat-config-network tool, and then did ifup ppp0 with rp-pppoe 
3.2 and i still had the same problems.

By the way, does it matter that i am using the same ethernet card for both ADSL 
and my LAN? I have set up eth0 as 192.168.3.1, and ADSL to use eth0, and i am 
doing the tests on eth0/192.168.3.1.

Comment 7 Ngo Than 2001-11-05 14:45:07 UTC
of course the network slow down drastically if you use the same ethernet card
for both ADSL and LAN !

In normal case it won't work!

To fix this problem you have to have 2. network adapter for your DSL



Comment 8 Chris Pauly 2001-11-05 14:55:46 UTC
But why does RP-PPPoE 2.6 work fine, and 3.2 doesn't? And why, even when i adsl-
stop/ifdown, does the network remain slow and bugged? This shouldn't happen and 
it points clearly towards a bug in 3.2. I should be able to use LAN and ADSL 
via the same ethernet card. The ethernet card is 100Mbps FD plugged into a 
100Mbps FD switch with the ADSL modem on the switch's uplink. Even with ADSL 
downloading at its maximum speed (512Kbps mine is), i should still get (and do 
get with RP-PPPoE 2.6) ~9+MB/s via the LAN.

Comment 9 Ngo Than 2001-11-05 15:45:14 UTC
please try ftp://people.redhat.com/than/7.2/rp-pppoe-3.3-2

Comment 10 Chris Pauly 2001-11-06 03:32:30 UTC
It works! There is no slowdown on my network after running adsl-start. The 
movie is still running smoothly and ftp is getting 8.5-9.5MB/s, even while 
downloading at maximum speed via ADSL. Great! Thanks! I wonder what the problem 
with 3.2 was?


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