DHCP server with multiple VLANs/Subnets

[vinsanity02]

Hi all,

Is it possible for one DHCP server to serve multiple VLANS with different IP subnets for each VLAN?

VLAN 1 = 10.65.0.0/24
VLAN 2 = 10.65.1.0/24
VLAN 3 = 10.65.2.0/24

How does it work?

Thanks a lot,
Alvin

[Jon Marshall]

Yes it is. You need to define each scope on your DHCP server and then for the vlans that don't have the DHCP server in you need to use an ip helper-address. So lets say your DHCP server si 10.65.0.10 in vlan 1. You then add this to the vlan 2 and vlan 3 interfaces -

int vlan 2

ip address 10.65.1.x 255.255.255.0

ip helper-address 10.65.0.10

int vlan 3

ip address 10.65.2.x 255.255.255.0

ip helper-address 10.65.0.10

Jon