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Old 12-01-2002, 07:03 PM   #16
joshmia2001
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Registered: Nov 2002
Location: St. Louis, MO
Distribution: RedHat 8.0
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Wow that sounds nasty..


Have you tried capturing the packets? RH 8.0 comes with a util to do this. I would try that and see what they say. Also you stated that you placed this same server somewhere else with 1 XP box and nothing else and it screemed for you right? Very interesting. I have a thought, are you sure that the Clients are looking to the Linux box for DHCP calls and getting the IPS all wrong? If you aren't using it turn DHCPD off. I have seen this before in a linux world. Be a little more specific as to how you are set up. 1 maybe 2 nicks? You may have covered all this already and I missed it as I am a fast reader. I would love to take a look around inside the linux box if you were worried about it. I have no idea how to hack or plant things, I am just good at the "Ahh haa" mode of thinking.
Let me stew this one over, it's very interesting.
Also make sure that your 2 nics (if you have 2) aren't using the same DMA address, this will certainly cause problems.

Joshua L. McDowell
http://geocities.com/joshmia2001/
 
Old 12-01-2002, 09:40 PM   #17
id09542
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Registered: Nov 2002
Location: Bloomington, Il
Distribution: SuSE 9.2
Posts: 22

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I totally agree. The problem is I have now eliminated all the problems I can think of.

I replaced the LAN infrastructure (Wiring, router, NICs) .. No luck

I have swapped out the Client/server machines -- no luck.

The last think I did was remove all machines from the production LAN except for the server and one client and replace the router/switch. It still fails.

When I pulled this server into my test lan with one client it worked. What is different one would ask? I have no idea, thus the situation I am in.

My common sense has left me now and I am out of basic troubleshooting ideas. You guys have been great with ideas, we just haven't hit on the right combination yet.

Pat
 
Old 12-01-2002, 10:19 PM   #18
KevinJ
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Registered: Feb 2001
Location: Colorado Springs, CO
Distribution: Redhat v8.0 (soon to be Fedora? or maybe I will just go back to Slackware)
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Was the single client that was left on the production LAN the same one you transferred to the test LAN?

-K.
 
Old 12-01-2002, 10:20 PM   #19
joshmia2001
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Registered: Nov 2002
Location: St. Louis, MO
Distribution: RedHat 8.0
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I know its a 1 in 1 trillion shot but here goes..

This is the dumbest thing I could think of but I have to tell you so I can say I threw everything at it that I could.
Check to make sure that no 2 network cards have the same MAC address. I know it's hardly possible and I have never personally seen it but I have heard "Urban Legends" about nerds gone wild because they couldn't figure out something and it turned out to be duplicate mac addresses. Did u use the ethx monitor tool to dump the packets that it is sending to look for contents?
Also when this is going on, is there a flury of lights going off anywhere? Check the back of each nic and at the switch and or hub. If you don't see a flury of activity going on I.E. no traffic then replace the mem in the server machine.. Wait that reminds me, go to your BIOS setup and LOAD BIOS DEFAULTS or OPTIMAL VALUES and see if that helps. I had my DUAL PII system acting really groggy and slow so I reset the values in BIOs, restarted and it madee LIGHT years of difference.
Back to the mem, the reason I say that is simple, with 1 machine attached the load on memory will be less that with 4 or five. Hence making the mapping of memory different. With many machines the memory get's spent much faster and in larger amounts perhaps hitting a bad spot. Do you have 2 sticks of Identical memory? Or 1 stick? If you have to I would certainly try setting the BIOs back to defaults or optimnal because you would be surprised how many times that has cost me hours of labor.

Joshua L. McDowell
PS If you do have a-lot of activity on the network unplug the machines one by one untill it stops, then test the network again.
Also make sure that SMB isn't making you life bad kill it with service smb stop and then start it again with service smb start if it kills and starts ok then that's not it. I would try that with all the major services. You may want to get the lastest kernel and build that, it may be a chipset issue.
 
Old 12-02-2002, 06:47 AM   #20
id09542
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Registered: Nov 2002
Location: Bloomington, Il
Distribution: SuSE 9.2
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I have tried "dumbing" the server down --- slow the memory speed set it ti CAS3 etc. No luck.

The MAC addresses are unique -- would make for a bad day.

I have very little activity on the LAN - it is way underutilized. The link lights show next to no activity after the userid/password is verified.

I have killed the SMBD/NMBD tasks multiple times, deleted the lock files even deleting the entire Samba directory structure and rebuilding from scratch.

The test LAN had a different XP client. I have been working with 2 prodution XP clients on the production LAN/Server. They both behave the same. I have tried either one alone to no avail.

This is about the only thing I can think of different between my networks. I was planning to re-image one of these machies as it is easier than physically moving it to my test LAN (They are in different buildings).

Having 2 clients behave the same makes me scratch my head - I could understand one being "sick", but both?? Well I have seen stranger things.

Pat
 
Old 12-02-2002, 07:37 AM   #21
joshmia2001
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Registered: Nov 2002
Location: St. Louis, MO
Distribution: RedHat 8.0
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You never did say if you had ..

Did you check to make sure you weren't DHCPDing the cards that the router should serve? Also there is a little known bug in RH 8, the RH update agent has been known to slow systems to a CRAWL. I don't know the exact details of it but I have heard about it more than once. I just turned it off and removed it from the system scripts. Can't member how I did it at the moment though. Use the services tool in X to kill rhn but there is another part that loads with X. I beleive it's the RHN agent that can screw ya. Did you try and capture some packets to see what's going on? And you didn't change the name of "localhost.localdomain' right? Did you get the 2.5 kernel and compile it? I am willing to bet that would take away your headaches! I am telling you to me it sounds like a good old hardware DMA type of a problem. Not to mention that a recompile would shrink the kernel and be for your machine type. One last thing, the switch / hub you are sure this is good? It also only takes 1 bad cable to make a whole slew of things look wrong! Once that's all in place I vote you get XP server and be done with it for now.. j/k but seriously I don't know what else you could do? The network capture progrram in is X it's called Network Analisys er something like that ..

Joshua
http://geocities.com/joshmia2001/
 
Old 12-02-2002, 08:03 AM   #22
moses
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Registered: Sep 2002
Location: Arizona, US, Earth
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I would take a look at your kernel configuration. Is this machine set up as
a router? should it be? make sure you don't have unnecessary junk built
into your kernel's networking support.
 
Old 12-02-2002, 08:20 AM   #23
joshmia2001
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Location: St. Louis, MO
Distribution: RedHat 8.0
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WOOPS! WRONG THREAD!

Woops! Wrong thread!

Last edited by joshmia2001; 12-02-2002 at 08:25 AM.
 
Old 12-02-2002, 08:44 AM   #24
id09542
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Registered: Nov 2002
Location: Bloomington, Il
Distribution: SuSE 9.2
Posts: 22

Original Poster
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It's a SuSE 8.0 distro, I tried to not to install any of the "fluff" that comes with this distro as I do not need the baggage. I am using an on-board Promise Raid controller so I am locked into using a Redhat/SuSE distro due to driver availability.



The DHCP server being used in this network is a Netgear Router/Switch. This I replaced with another model of a Netgear Router/Switch with no difference. DNS is not enabled as I use the my ISP's nameserver, but I do not require DNS for my machines. I changed the MTU in the router to 1000 from 1500 (What the heck) .. no difference.


Everything non-Samba appears to run great. I can FTP between machines with excellent numbers. Mail runs great, browser behaves nicely. It's got to be something with my Samba config or netbios. I have used the identical Linux distro and smb.conf on my test machine/network and it worked, so I think the smb.conf is correct. I have tried using WINS on the Samba server ... no different.

The logs show nothing unusual ... verify userid/password, load roaming profile .. "then go to sleep". Same scenario when roaming profiles turned off.
 
Old 12-02-2002, 02:30 PM   #25
joshmia2001
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Registered: Nov 2002
Location: St. Louis, MO
Distribution: RedHat 8.0
Posts: 20

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Did you try using SWAT to configure Samba?

Have you tried to use SWAT to configure samba? Here is what my smb.conf looks like..
# Samba config file created using SWAT
# from 192.168.0.116 (192.168.0.116)
# Date: 2002/11/30 19:22:34

# Global parameters
[global]
workgroup = @WORK
netbios name = THE_BOMB
interfaces = eth0
security = DOMAIN
encrypt passwords = Yes
update encrypted = Yes
log level = 3
syslog = 3
log file = /var/log/smb.log
domain logons = Yes
os level = 64
domain master = Yes
wins support = Yes
hosts allow = ALL

[HOMES]
comment = Home dirs
path = /home/
read only = No

Granted it's not the most secure thing in the world but it works for now and I am not tinkering with that!

Joshua L. McDowell
PS Also check your STATIC routes!
 
Old 05-21-2003, 03:30 AM   #26
a68254
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Registered: May 2003
Distribution: Debian
Posts: 3

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Slow network connection

I've recently experienced the exact same problem. The solution for me was a change in hardware, I had an onboard intel pro 100 nic on the mboard, I disabled the onboard nic in the bios and plugged in a dlink nic instead, solved the problem. The problem can probably be solved changing the nic driver or writing your own.
 
Old 06-26-2003, 12:13 AM   #27
pembo13
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Registered: May 2003
Location: Caribbean
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Unhappy

Needless to say I have the same ehad aching problem. All networkign hardware is brandnew and my lights on the switch make me want to cry, as fiel transfers between Win an RH 9.0 via network neighbourhood are sluggish ans sometime kill over and die.

I'd really like this resolved..any ideas?
 
Old 12-03-2003, 03:10 PM   #28
flszen
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Registered: Dec 2003
Posts: 3

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I've noticed this same problem with SuSE 8.1. I'm using multiple NICs which use the 8139too. After trying various things to see why there were horrible problems with the incoming network connecitons, as well as consulting some friends, I discovered that the ACPI in the kernel produces these strange effects. By booting with acpi=off the problem disappears. In my /var/log/messages there were multiple 'netwatchdog' (I think) entries before it shutdown networking altogether. Maybe this is your problem?
 
  


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