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Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.

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Old 01-31-2003, 10:46 PM   #1
KillerCheeto
LQ Newbie
 
Registered: Nov 2002
Location: KC Missouri
Distribution: Fedora Core
Posts: 20

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Unregular slowness...


Im running a network on a 4 port router that 4 computers are connected to... 2 winxps and 2 linuxeses...

Now my major dilema is LAN communication... is the exact opposite of BLAZINGLY FAST!!!

I try and access an internal webserver (for developing PHP scripts) and sometimes the websever serves the pages in 20-30 seconds after I refresh...

This happens to both linux machines on the network... and Im not too sure about the two winxps...

I'm pretty sure it's a bottleneck with the LAN stuff... either something is misconfigured or not their... because the servers don't have any stress on them besides me...

Please help me troubleshoot this problem... as it's leaving me insane...

Thanks in advance!
Shane P.
 
Old 02-01-2003, 03:06 AM   #2
Darin
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Registered: Jan 2003
Location: Portland, OR USA
Distribution: Slackware, SLAX, Gentoo, RH/Fedora
Posts: 1,024

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Just some random network stuff that could be a bottlneck and most of it you should change even if it's not what's screwing up your network:

Check each computer to make sure the network card matches speed/duplex of the router. Some of them are just a cheap hub with a DSL connection and some are actually full layer 2/3 switches capable of 100bT or 1000bT at full duplex on every port.

Get rid of any redundant protocols that are not essential. In most ethernet setups with an internet pipe this means anything NOT TCP/IP such as IPX/SPX, NetBEUI, decnet, banyan vines, IPX/ODI. Make sure to check every machine on the LAN.

Make sure you don't have a misconfiguration, some mistakes won't stop a network from working but can cause problems. An example would be a bad primary DNS server address with a good secondary DNS address.

If your router/hub/switch has activity lights and even collision lights for each port then check the individual ports for one computer that has excessive traffic or collisions. If not you can try to take one or more computers off the network (at the router) and see if bandwidth increases.

If one computer appears to be the source, possible fixes include replacing the network cable, replacing the network card, replacing the card's driver or just verifying speed and duplex settings at the card and at the port (note it's usually best if both ends are set to "auto negotiate" or both are set to a specific setting such as 100/half and will not work in most cases where one end is auto and the other is forced.)
 
Old 02-01-2003, 11:56 AM   #3
KillerCheeto
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Registered: Nov 2002
Location: KC Missouri
Distribution: Fedora Core
Posts: 20

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I think I have an extreme misconfiguration with my router... since I have no DSL hooked to it at this momment... and it can't verify any settings (like domain, and servers, and stuff)... could this be a possible reason?
 
  


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