Unable to recieve IP address from the DHCP server.

[Ivan Tay]

Hi all, I'm having trouble getting an IP address from the DHCP server. I'm able to ping the server but unable to get an IP address, I've done most of the things I already know, trunking, ip helper etc. But still unable to get it to work. What's weird is that my other server can get automatically assigned and IP address but my other end devices can't. Can anyone help?

I'll attach the packet tracer file as well as a screenshot.

Thanks!

[Martin L · Accepted solution]

Looks like IP helper IP is wrong;

interface GigabitEthernet0/1.30

encapsulation dot1Q 30

ip address 128.1.0.1 255.255.255.0

ip helper-address 128.1.0.2

!

interface GigabitEthernet0/1.80

encapsulation dot1Q 80

ip address 128.1.1.1 255.255.255.0

!

shouldn't be IP helper with IP of 128.1.1.2 ? check your IP of server. And you do not need helper on dot.1q 80.

and 2nd mistake server dhcp pool for vlan 30 is not correct (network IP)

Regards, ML
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[Ivan Tay]

Thank you so much! :)
Cheers,
Ivan