For the initial planning, forget about subnets. Think about which
switches you want to be linked together. Currently all of your switches are
linked so that they make up one network segment. What you want to do is
change these links so the you have two network segments. This is just a
matter of changing the cables between the switches. If these switches are
all in the same building it should all work OK.
When you have split your network into two segments, you need an IP
router to connect the segments together. The router has to have one
interface in each segment. You then arrange for the segments to be in
different IP subnets. In the segment with the DHCP server, this is fixed by
the IP address of the DHCP server's NIC. In the other segment, you do this
by giving the router interface in the "new" segment a static IP in the "new"
subnet.
You can have just one DHCP server for both segments if the router has
DHCP relay enabled. You set up a scope in DHCP for each subnet. The machines
in the same segment as the DHCP server will get their network config
directly from the DHCP server by broadcasting on the LAN. They will get IP
addresses from the same subnet as the DHCP server's IP address. The machines
in the "other" segment will also broadcast on that LAN. The router will see
these broadcasts and forward the requests to the DHCP server. The DHCP
server will allocate IP addresses from the correct scope, because it knows
the IP address of the router interface which received the original broadcast
request. Machines in the same segment as the DHCP server get IP addresses
from one scope and machines in the other segment get IP addresses from the
other scope, so are in a different IP subnet.
How you set up the routing depends on how your current setup works and
how it connects to other networks.
"foler" <(E-Mail Removed)> wrote in message
news:E5516691-333C-4F02-84CE-(E-Mail Removed)...
> OK, but how to assign some switches to subnet 1 and another switches to
> subnet 2? And how to assign users from different switches to same subnet?
>
> Switches are on different floor in building.
>
> --
> Kajza je najljepsi u
> vasioni-)))))))))))))))))))))))))))))))))))))))))))))))))) ))
>
>
> "Robert L [MVP - Networking]" wrote:
>
>> I would install DHCP server in each subnet rather than trying to
>> configure one DHCP server for WAN or more than two subnets. DHCP packets
>> will not be forwarded by the router unless you specifically configure it
>> on a router or configure additional DHCP relay agents.
>>
>>
>> Bob Lin, MS-MVP, MCSE & CNE
>> Networking, Internet, Routing, VPN Troubleshooting on
>> http://www.ChicagoTech.net
>> How to Setup Windows, Network, VPN & Remote Access on
>> http://www.HowToNetworking.com
>> "foler" <(E-Mail Removed)> wrote in message
>> news:70D84161-A8CF-4A79-88E3-(E-Mail Removed)...
>> Hello...
>> I need your help for reorganization my LAN.
>>
>> We have in company NT 4.0 LAN with 5-8 switches, 250 hosts, 1 router
>> for
>> connection to internet. Entire LAN have single subnet without dhcp
>> server. I
>> want to create new LAN environment with upgrade server 2003 servers and
>> active directory with 2 subnets and with one dhcp server with
>> possiblity to
>> divide users accross different switches to same subnet. Some people
>> which I
>> want to be on same subnet is connected to different switches across
>> LAN. All
>> hosts currently have static ip adresses.
>>
>> For first time, I need to configure only dhcp server with two subnets.
>> Active directory I can implement letter.
>>
>> Which is best way for this?
>>
>> --
>> Kajza je najljepsi u
>> vasioni-)))))))))))))))))))))))))))))))))))))))))))))))))) ))
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