DHCP for different VLANs

[Izac ICT]

Dear All,

I have two VLANs on my 2960 SW and 3950Sw. There are two different DHCP Pools on MS DHCP Server. Clients on different VLANs should receive IP addresses according to their VLAN.

How can I do that? Could you please share an example?

THanks

Cheers

Isac.

[Deepak Kumar · Accepted solution]

Hi, 

As I am understanding your question you having one DHCP server which is (suppose) under the VLAN 10 and IP address of server is 192.168.10.100/24 and at the same time you are having another VLAN 20 for users but you want to use the single DHCP server.

Yes, it is possible with help of "IP helper-Address xx.x.x" command.

your configuration on your core switch:

interface vlan 10

ip address 192.168.10.1 255.255.255.0 (maybe difference IP address) 

exit

!

interface vlan 20

IP address 192.168.20.1 255.255.255.0 (maybe difference IP address) 

ip helpder-address 192.168.10.100

exit

!

regards,

Deepak Kumar

[Izac ICT]

Hello Deepak,

Thank you for reply. Actually DHCP server is connected to management VLAN1 and I have VLAN10 and VLAN20.

DHCP server has two pools :  Pool1-192.168.10.0 and Pool2-192.168.20.0

vlan 10 client get IP from Pool1

vlan 20 clients get IP from Pool2

So should I assign IP helper address to VLAN10, too.  Does it solve the issue? May I use same gateway(router) address for both VLANs?

Thaks again.

regards

Isac

[Deepak Kumar]

Hi, 

You have to assign the IP helpder-address to your both VLAN 10 & 20. 

Regards,

Deepak Kumar