Hi Harris,

Here is a sample config from a 3750 with multiple pools and multiple helper-addresses The same commands should be used on 6500 or 4500.

Switch-B(config)#do sh run | i dhcp
ip dhcp pool 20.20.20.0
ip dhcp pool 30.30.30.0
Switch-B(config)#do sh run int vlan 10
Building configuration...

Current configuration : 121 bytes
!
interface Vlan10
ip address 10.10.10.1 255.255.255.0
ip helper-address 20.20.20.1
ip helper-address 30.30.30.1
end

Switch-B(config)#

HTH

Reza

On our router, we do it like this (I'm not sure this applies to IOS switches, but it does work on our router):

1. create subinterfaces configured with VLANs and IP addresses
2. create DHCP pools with networks that contain the IP addresses of the VLAN subinterfaces

The router will then assign DHCP clients their addresses based on the interface VLAN/network that the request was recieved on

Here are some config snippets:

The interfaces (Step 1)

interface GigabitEthernet0/0                                                   

no ip address                                                                 

duplex auto                                                                   

speed auto                                                                    

!                                                                              

interface GigabitEthernet0/0.1                                                                                       

encapsulation dot1Q 1 native                                                         

ip address 192.168.1.254 255.255.255.0                                        

!                                                                              

interface GigabitEthernet0/0.2                                                                                        

encapsulation dot1Q 2                                               

ip address 192.168.2.254 255.255.255.0                                       

!                                                                              

interface GigabitEthernet0/0.3                                                                                        

encapsulation dot1Q 3                                                        

ip address 192.168.3.254 255.255.255.0

and here are the DHCP pools (Step 2)

ip dhcp pool Pool1                                                  

   network 192.168.1.0 255.255.255.0

   domain-name DOMAIN.COM                                                                                    

   dns-server 192.168.1.10                                                 

   default-router 192.168.1.254  

Hi,

You can of course have multiple DHCP pools for multiple Vlans.

HTH

Mohamed

Hello

---

@harris.em wrote:

Is it possible to have multiple dhcp pools for multiple VLANs? The switch is a 6509 and/or 4506 catalyst. I don't want to use server-based products. Thanks in advance.

---

Below is a example of dhcp pools using vrf on  SVI interfaces.

int vlan 10
ip address 10.1.10.254 255.255.255.0

int vlan 20
ip address 10.1.20.254 255.255.255.0

int vlan 30
ip address 10.1.30.254 255.255.255.0

int vlan 40
ip address 10.1.40.254 255.255.255.0

ip dhcp pool vlan10-20
vrf TEST
network 10.1.10.0 255.255.255.0
network 10.1.20.0 255.255.255.0 secondary
override default-router 10.1.20.254
default-router 10.1.10.254
lease 0 8

ip dhcp pool vlan30-40
vrf TEST
network 10.1.30.0 255.255.255.0
network 10.1.40.0 255.255.255.0 secondary
override default-router 10.1.40.254
default-router 10.1.30.254
lease 0 8

ip vrf TEST
ip dhcp use vrf connected <- when no helper addresses are required
ip dhcp use vrf remote <- when helper addresses are required