04-03-2007 05:07 AM - edited 03-05-2019 03:16 PM
Dear All,
I need some help. In my network we separate network / department.
Example
vlan 1 Finance
vlan 2 Technical
vlan 3 Sell
Now We would like to implement DHCP as Centralize Server.
DHCP Server has only 1 interface locate in vlan 1
How can we config in router 3660 to let other vlan receive "Assign IP" from DHCP server in Vlan1
Here is Example configuration in router
interface FastEthernet1/0.1
encapsulation dot1Q 1 native
ip address 10.15.12.254 255.255.255.0
no ip redirects
no ip proxy-arp
ip directed-broadcast
no cdp enable
!
interface FastEthernet1/0.2
encapsulation dot1Q 2
ip address 192.168.90.1 255.255.255.0
no ip redirects
no ip proxy-arp
ip directed-broadcast
!
interface FastEthernet1/0.3
encapsulation dot1Q 3
ip address 172.17.0.254 255.255.255.0
ip directed-broadcast
no ip redirects
no ip proxy-arp
no cdp enable
!
04-03-2007 05:14 AM
Hi Sirapat,
Under Interface fa1/0.2 and interface fa1/0.3 add one command "ip helper-address
This will redirect your DHCP traffic from other vlans as unicast to vlan 1.
HTH
Ankur
*Pls rate all helpfull post
04-03-2007 06:14 PM
Sirapat
I believe that Ankur has given the correct command to get each of the subinterfaces to forward DHCP requests to the DHCP server. I would add that you need to verify that the DHCP server has a separate scope configured for each of the subnets on each of the subinterfaces.
HTH
Rick
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