Well explained tutorial on how to config a vlan interface in a FreeBSD-CISCO environment.
The steps are explained here and the saved page is here (PDF format on 22 apr 2011)
An older post found the web still usefull.
url: http://www.cyberciti.biz/faq/howto-move-migrate-user-accounts-old-to-new-server/
pdf: here
Based on the Ian Atkinsons post, saved in PDF format here.