DHCP and VLAN Problems
Posted on 2010-11-11
Currently all my users is using this IP range 10.0.0.x 255.255.0.0 .
We have 7 floors in this one building . Each floor have a 24 ports switch 3Com 2924-SFP Plus which serves all the user at that particular floor .
Each switch will connect back to our main switch which is 3Com 2924-SFP Plus through fiber.
This main switch will connect to a firewall thru UTP cable for the gateway.
Gateway IP is 10.0.0.1/16
Now what I'm trying to do is :-
1) To allocate each floor with different ip segment(using DHCP) . i.e :-
Level 1 = 10.0.1.x /16
Level 2 = 10.0.2.x/16 and so on
So my question will be :-
1) Can it be done with our existing switches ? If yes , do I need to configure each LAN port at those switches manually ? Can i just do it at the SPF ports instead?
2) If it CANT be done , what are the hardware that I should procure ( ie switch specs)
3) For DHCP , I cannot create multiple VLAN that have the same subnet .It will throw an alert informing me to change the subnet .
Example :- First I will create a scope of 10.0.1.x/16 . It works well . Then when I try to put in 10.0.2.x/16 , the alert came in. How is the correct way to do this? I want the DHCP server to automatically issue IP address based on the user locations. Else every user will have 10.0.1.x despite their locations.