[pox-dev] Adding/Modifying a VLAN Tag at the POX Controller

[A Sydney]

Hi folks,
           When a packet arrives at my controller, I'd like to
insert/modify the VLAN tag. The link below shows an example of changing the
dns IP address in a packet:

http://codepad.org/TcYyTZyV

How would I go about doing something similar for the VLAN ID? For example,
a packet arrives at the controller tagged with VLAN x, and I'd like to
change this to VLAN y, before sending it to the switch.

Thanks,
Ali