DHCP Relay Issue

[junquel]

Hello masters;
Please some help. I have read the topics about DHCP Server, but I still have the problem...

This is my scenario:I have ubuntu server 12.04 as centralized DCHP Server and OS6850 with AOS 6.4.4
The problem: My DHCP Server on the VLAN 9 works fine if my Desktop is on VLAN 9 too. However, a laptop on the VLAN 101 can`t get address.

Commands IP HELPER:
I tried 2 ways according the forum:
First:
ip helper address 172.17.9.1
ip helper forward delay 0
And this:
ip helper per-vlan only
ip helper address 172.17.9.1 vlan 101
ip helper forward delay 0

Both the same results.
The show ip helper stats: There is not forw delay violation.

What is missing???
Kind regards, Peter...

[silvio]

use wireshark to sniffer the dhcp-requests/offers at the server for finding the reason. It works successfull with microsoft dhcp. Your switch needs ip-interfaces in both vlan's (normaly it should be the gateway for clients in vlan 109).
regards
Silvio

[junquel]

OK Silvio. Let me check WireShark.
Do you suggest to use DHCP based Windows Server??

Thanks:
Additional Info:
VLAN 9 - Servers - ip interface 172.17.9.254/24 (My DHCP Server works here: 172.17.9.1)
VLAN 101 - Eng01 - ip interface 172.17.101.254/24

There is fully connectivity between VLANs and DHCP Server too.

Regards...
Peter

[silvio]

ip interfaces are good (last time I mean vlan 101 instead of 109).
dhcp from windows server did work in every case at me. With wireshark you can find the difference between the succesfull dhcp and the other....
hope you will share your result here.
regards Silvio