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Configuring Cisco 2960G Switch

Posted on 2010-09-08
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Last Modified: 2012-05-10
I am configuring some new computers, however, before adding them to our Domain I want to install basic updates and do some pre-configuration things.

We have a public DSL line that I can use, however, I can only do one at a time. I have a Cisco 2960G 8-port switch that I want to use to hook up all the machines. The problem is I cannot find out how to configure the switch to enter the IP settings for our DSL line.

If I set the IP settings for each individual computer, rather than the switch, I get an IP confict error message.

Any suggestions? I downloaded Cisco CNA tool and it can seem to find a connection between the switch and computer.
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Question by:SStarks
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10 Comments
 
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Expert Comment

by:jorlando66
ID: 33629219
where are you getting dhcp from? Assuming the dsl router.  If you know what IP the switch is getting from the router you don't need to configure anything else.  Just assign the pc's addresses further up the scope than the IP that the switch is pulling.  It sounds like you are stepping on the switch's IP when assigning the computers their static ip's.  

Have you tried not assigning any static IP's to the computers and letting the dhcp from the dsl router handle it all?  The switch should need no configuring out of the box to function.  It should pull an IP address from the dsl router and allow connected pc's to do the same.
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Author Comment

by:SStarks
ID: 33629376
Im not sure if this switch has been set-up and used previously. I got the DHCP from the Network Admin. to manually set for our public DSL line. I cannot seem to find the IP from the switch.

Here is my theory: Being that I cannot manually configure each computer with the same DSL information given to me by the Network Admin, I could instead, manually configure the switch with the same information, connect all the PC's and from there, it will allow each computer to go and find its own IP. Is that correct?
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Expert Comment

by:jorlando66
ID: 33630400
Plug the dsl modem into the switch.
Plug the computers into the switch
see if they can get to the internet.
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Author Comment

by:SStarks
ID: 33630994
@jorlando66 I did that and the only one that is getting DCHP, is the one that I manually configured with our DSL information. The others search for an IP but never connect.
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Accepted Solution

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ngravatt earned 250 total points
ID: 33636752
I would try erasing the config on the 2960 and starting from scratch on it.  All of the interfaces should be on the default vlan (vlan 1) after you erase the current config on the switch.  Then simply plug in the dsl modem, make sure that it is set to hand out DHCP addresses, and that the pool has at least the number of computers you will be connecting to it.

2960 global config mode:
Switch: write erase
Switch: reload

Simple as that.  We currently use the same setup in one of our offices off site that didn't need to reside on our main corporate network.
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Assisted Solution

by:jorlando66
jorlando66 earned 250 total points
ID: 33640521
Sorry had work to do. :)
Resetting the switch should solve your problem.  Do you know how to reset the switch?
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Author Comment

by:SStarks
ID: 33647195
Ngravatt,  

  Thanks you, that is exactly what I need to know how to do!

@jorlando66 I believe ngravatt gave me instructions on how to reset the switch?

2960 global config mode:
Switch: write erase
Switch: reload
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Expert Comment

by:jorlando66
ID: 33662925
yes
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by:ngravatt
ID: 33771177
Please assign points and close if this resolved your issue.  Thanks, glad I could help.
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Author Closing Comment

by:SStarks
ID: 33803084
Resetting the switch and adding the correct info from the digibox provider did the trick. Thanks for all your help
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