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How to setup DHCP at one site to service clients at branch locations

Posted on 2004-04-29
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Last Modified: 2010-04-19
Hello,

I have a DHCP server at a location called "5"

The scope is configured as 10.x.1.1 to 10.x.2.1 where "x" is the campus number.  The mask is /20

This works just fine....


Now, the question is...I want to add locations "1" to "4" and have them receive addresses from the DHCP server at location "5".

The locations are connected via Extreme layer 3 switches.

I want to be able to assign a scope, say to location "4", and make it 10.4.1.1 to 10.4.2.1 and make sure that computers at that location receive one of the 10.4 addresses.

Can this be done?  How?
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Question by:TheCleaner
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6 Comments
 
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Expert Comment

by:corneliup
ID: 10956948
You need to configure your Extreme Layer3 switches as dhcp relays
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corneliup earned 1000 total points
ID: 10956959
the ideea is that the switch will receive the broadcast from the client and forward it to the dhcp server in the name of the client.

http://www.extremenetworks.com/services/documentation/EW_XOSConceptsGuide.pdf

page 182 "Configuring DHCP/BOOTP Relay"
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Author Comment

by:TheCleaner
ID: 10959176
corneliup,

thanks for the link to page 182....

I'm going to test it, but I want to make sure that site 4 gets a 10.4 address, while site 3 gets a 10.3 address from the dhcp server.

Will it just "know" to do this if I set up the scopes with those ranges?  How does the client know which scope to "pick from"?
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LVL 7

Expert Comment

by:corneliup
ID: 10971131
Yes, it will work like this, because the dhcp will receive the "broadcast" from a relay within the scope
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Expert Comment

by:corneliup
ID: 10971135
I've configured on nortel layer 3 switches, but it's the same, a layer 3 switch doing dhcp relay
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Author Comment

by:TheCleaner
ID: 11059290
corneliup....excellent links again...thx for all the help!
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