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morinsk

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installed new netgear switch, cannot get internet connectivity to work stations

My school recently tripped a circuit breaker and possibly as a result my Netgear 16 port fast switch died.  it has no power any more.  I  have since bought a new Netgear Prosafe 10/100 16 port switch model FS 116. When I hooked it up, I cannot get internet connectivity to my work stations.  I can get the internet directly from the DSL line and from the modem when it is hooked to the DSL line.  But when I connect the modem to the switch I lose the internet. The switch does work on a different network across the street.  Do I need to reprogram something?  I get some solid and some blinking green lights on the switch when it is hooked up.  Please help.
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Naga Bhanu Kiran Kota
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Please advise me as to how I can check my modem and reset it if necessary to pppoe mode?  Also I don't think I have a router unless a PC can act as a router.  Can it? If so please be more specific on how to configure it so NAT is on.  Thank you for your help so far.
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Please advise me as to how I can check my modem and reset it if necessary to pppoe mode?  Also I don't think I have a router unless a PC can act as a router.  Can it? If so please be more specific on how to configure it so NAT is on.  Thank you for your help so far.
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Hi. Here are the results of my ipconfig test on the modem.  My modem model is a Westell Model # 6100.  Here is some of the ifpconfig info.  
microsoft ISATAP adaptor #2   DHCP enabled NO Autoconfiguration enabled YES
Link - Local IPv6 address fe80: : 5efe:169.254.90.59%18preferred
NetBios over TCPIP disabled
Tunnel adaptor Local Area Connection *10:
connection specific DNS suffix my home.westell.com
description ISATAP.myhome.westell.com
LInk - Local IPv6 Address fe80:: 5efe:192.168.1.47%12preferred
DNS servers 192.168.1.1
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Hi Savone:
                Darn I really thought we had it with your great suggestion on reconfiguring the modem. Alas no go.  I was able to follow the directions, yours and the ones from the website with no problem I thought.  I did not reboot the laptop before hooking the modem back to the switch.  Any way the blinking lights returned and there was still no internet access at any of the workstations.  Now it gets worse, when I went back and plugged the modem directly into the laptop without the switch to check on the installation, now I cannot get on line directly from the modem. the ethernet light on the modem blinks off and on and my laptop cannot accest the net.  Needless to say I am very frustrated but sitll hopeful that you or one of your partners can figure out what is going wrong at my poor school.  Had a day off today and could not work the magic.  Soooo sad. please please help.  I'll pay good I promise. Steve
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Okay success!!!!  your method probably got me to where there was light at the end of the tunnel.  You might want for future reference with people who have a similar problem to have them ping their provider and their web browsers and to also try the ethernet cable in a different port on the switch. any way thanks for all of the good suggestions. I learned a lot along the way and now we have internet again. yea.