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i am running an internet network consisting of 300 computers connecting to the server with switches(around 70 in no.) through cat5 cable, i am using surecom 16 port normal switch as a main switch which connects to the server, i am getting problem if any user in my network has some problem with his lancard it transmits something back to the switch his PC is connected to and then it spreads to all the switches on the network hanging the network or if any of the said 70 switch gets faulty then the network hangs, first of all i want to ask what is a rackmount switch? shud i install it after the server? will it prevent hanging? how is it differ from the normal switch
With that many PC's you may want to look at replacing your present switches with managed enterprise level switches.
It sounds like you're getting a broadcast storm, but, that shouldn't happen with switches. Hubs certainly, but a decent switch should prevent a broadcast storm.
A rackmount switch is simply a switch designed to mount in a rack. Most, if not all, enterprise level switches are rackmount. I've always thought rackmounts were "normal" myself.....lol.
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It sounds like your network configuration is presenting a single point of failure. You may want to see if your switches will support subnetting. Then set up a router with subnetting in an effort to increase stability and to isolate the users. Or, at least look over your network to determine the location of your collision zone(s), and work on isolating them from each other.
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1st see if the PC connects to the internet: Open a Command Prompt Windows and type: ping yahoo.com. The result should show you have 4 successful pings. If the pings failed, then you have a problem with NIC card on your PC. It may be that the WEBCAM is using an Interrupt (IRQ) that was assigned to your NIC card. If you want to, you can change the NIC card's IRQ by accessing the PC's setup configuration. Proceed cautionsly! 1st, click on start, then right click on MY COMPUTER and left click on properties. The click on hardware, then device manager, then find you NIC under "Network Adapters" then use do some trouble shooting by clicking on "trouble shoot this connection" to see if that helps.
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Am I reading this right? 300 pcs with 70 switches? That is like 4 pcs per switch!!!
THIS IS AN EXTREMELY BADLY DESIGNED NETWORK TOPOLOGY.
It would appear that someone not understanding networking/hardware has cascaded switches. I would have to imagine with this setup they have also created network loops. No mention of managed switches so you don't have STP [spanning tree protocol]which detects and shuts down the loops so you don't get the broadcast storms you describe.
It would appear you need a complete redesign of your network topology. UNDERSTAND THIS NEXT POINT CLEARLY: you will not be able to throw a managed switch into the mix and expect different results WITHOUT DOING A REDESIGN and possibly recabling to achive the standard design of a backbone switch with all other switches cascaded off that backbone switch [and no other switches off those cascaded switches]
Are you ready for where Microsoft wants you to go today?
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That may be the point. If he is actually using switches and not hubs, then the broadcasts would be kept to a minimum. But if he is using dumb hubs, then broadcast has free reign. Do you know how many actual switch (level 2) devices you are using in comparison to hubs (level 1) devices in your network?
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with 70 switches broadcasts are the least of the worries. the problem described most closely fits a network loop. no STP no network traffic if you have a loop.
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let me tell u how i the network is,
server to main switch 16 port
main switch to 6 lines all consisting of 8 port switches in different directions in my area
out of total 6 lines 4 lines has 12 switches each 2 lines has 16 switches each connected through cat5 cable
the maximum distance i have kept in between every switch is 90 mtrs, minimum is 2 mtrs(if 2 swtiches are kept together) i dont use hubs.
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Proper config
Backbone switch
^
All other switches
^
workstationsYour setup is not based on optimal network configuration and this is exactly why you are having network issues.
Ask any network engineer that is worth their salt.
One server? For 300 pcs? Does management have any idea the revenue loss if that server goes down for even just one hour? At a minimum per employee cost load of $10 an hour you have a $3000 per hour loss! That's $24,000 per day! And that is MINUMUM
Sorry marc_gujral but you have serious issues with your network beyond a few lockups. You need to hire a professional consultant to come in and clean up the mess.
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