I work in an environment where we have several VLAN for both data and VOIP traffic. Unfortunately I don't have access to the switch to quickly determine which VLANs are assigned to each port.
I was hoping to use an arduino with an Ethernet shield and LCD as a DHCP probe to quickly determine which VLANs are assigned. Getting the data VLAN seems pretty straight forward as there is a sketch provided in the the Ethernet library that demonstrates this.
We use an Avaya switch and Avaya phones. Is there a way that I can program the arduino to mimic an Avaya phone when requesting an IP?