configuring Windows DHCP server.

configuring Windows DHCP server.

In the scenario that I have windows DHCP server with IP address 192.168.12.12/24. How can this server hand out IP addresses to clients in different subnets ?

Thank you
jskfanAsked:
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David SankovskySenior SysAdminCommented:
Let's start with some questions that can help us help you.

Please describe your environment:
Switches (smart or simple)
is the DHCP server Physical or Virtual
etc.
Omar SoudaniSenior System EngineerCommented:
You should configure VLANs, then you can configure DHCP relay agent for multiple subnets.

https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/cc771390(v=ws.11)

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jskfanAuthor Commented:
Switches : Cisco Switches (Smart)
DHCP server: Physical.

I thought you can configure Default Gateway on the DHCP server to point to the interface IP address of the Router. On the Router interface to which the Access switch is connected to , you configure the Ip Helper address command to point to the IP address of the DHCP server.
That way when clients request IP address the Router will redirect them to DHCP server ,
However I do not know the details , how it works. For instance a Client which is connected to a switch port in Vlan 25 (192.168.25.0/24), when it requests IP address, how does DHCP server knows that it should hand out IP address from the Scope (192.168.25.0)

Thank you
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jskfanAuthor Commented:
any update ?

Thank you
MaheshArchitectCommented:
I am not network guy
however dhcp works on process called "DORA"
https://vinitpandey.com/2015/06/17/dora-process-of-dhcp/
in simple words when client request hits switch port, IP helper on switch actually hAve dhcp server entry and based on this entry switch actually forward that request to dhcp server with source subnet / network ID details and then dhcp come to know that it needs to hand out ip to that specific network
MASEE Solution Guide - Technical Dept HeadCommented:
hi jskfan,
Please have a look on this video to understand how to configure IP helper on switch.
https://www.youtube.com/watch?v=rJCa6R2VL6o
jskfanAuthor Commented:
Thank you Guys!
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