How did I find the DHCP Server?

[MrTone123]

Hi:

I'm a bit puzzled by something:

I plugged my laptop into a 3750 switchport and it got an address via DHCP.

My question is, why?

The switchport is g3/0/29.

The configuration of that port is blank. It just reads:

interface GigabitEthernet3/0/29.

A "show vlan" indicates that vlan1 is the default vlan and that g3/0/29 is on vlan 1.

There is no DHCP server on vlan1.

Vlan 1 does not have an ip helper-address configured.

ipconfig shows that the dhcp server that was used is on vlan 10.

How did those dhcp broadcasts get to vlan 10?

Thanks,

Tonyh

[Thotsaphon Lueangwattanaphong]

Hi,

   It should not happen. Please post the current configuraion,excluding sensitive information. Does the dhcp server exist on VLAN-10?

Toshi

[cadet alain]

Hi,

Can you post output of ipconfig/all and arp -a on laptop.

Regards.

Alain.