Trouble to obtain ip via external DHCP

[carlo_ca_ete]

Hi,

My network is in a vlan environment, each SSID,the ZS1200 and a ZF R500 is a different Vlan. Further, i have a Windows DHCP server 2008 Standard with a scope for each vlan/ssid.


DHCP . .       . . . |Switch core|. . . . . .       . . . . . . . |Switch Distr.|
Server                          |                                                     |
Vlan 50                         |                                                     |
                                     |                                                     |              SSID1/Vlan205
                                     |                                                 ZF R500    ))))))))))
                                     |                                                 Vlan232
                               ZD1200                                                              SSID2/Vlan206
                               Vlan202                                                             ))))))))))


The ZD1200 is configured with ip controller 192.168.202.x Vlan 202, SSID1 Vlan 205 y SSID2 Vlan 206.

SSID1 should give the 192.168.205.x segment via scope DHCP external server.
SSID2 should give the 192.168.206.x segment via scope DHCP external server.
The DHCP server is in the segment 192.168.5.x.

The switch Core is WS-C3750X-24T-S, conects the ZD1200 in a trunk port:

stack3750#sh run int Gi2/0/3
Building configuration...
Current configuration : 123 bytes
!
interface GigabitEthernet2/0/3
description WLC RUCKUS
switchport trunk encapsulation dot1q
switchport mode trunk
end

The switch Distr. is WS-C2960S-48FPS-L, this conect the ZF R500 in a trunk port:

sw2-Piso2-O#sh run int Gi1/0/9
Building configuration...
Current configuration : 142 bytes
!
interface GigabitEthernet1/0/9
description AP-RUCKUS
switchport trunk native vlan 232
switchport mode trunk
spanning-tree portfast
end

in this port the native vlan is the vlan 232 (vlan ZF R500).

Ip helper DHCP is enabled in both switches.

when a user connects to SSID1 o SSID2, the conection is sucess but the user is not getting ip from external DHCP server.

I tried to enabling DHCP relay and option 82 in ZD1200 ( the option 82 is enabled in server DHCP) but the users not yet obtain ip.

I'll be attentive to your comments.

[jayaratnam_vint]

may i know what is the problem in dhcp server?
I have same problem.

Thank you

[supun_rathnnaya]

How to remove dhcp binding from ZD.

[monnat_systems]

I am not sure what you mean by dhcp binding ?

[supun_rathnnaya]

I already configured dhcp server on my ZD. I need to clear, that had issued ip addresses from the ZD. It screening like below.

.
Thanks,

[monnat_systems]

well, there not much nuts and bolts in ZD DHCP server to twist and turn. i think if you just disable and enabled the DHCP that should do the trick.

ideally if your network is large and complex better use external DHCP server...