IEEE 802.1Q seems to be pretty clear on GVRP being a requirement for VLANs (certainly to claim 802.1Q compliance) and I don't know of another mechanism for switches to communicate VLANs registration and configuration information. But I found this article:which says GVRP isn't widely deployed. If VLAN requires GVRP, then that implies VLAN isn't widely deployed. Which seems wrong. I imagine I'm missing something. Can anyone shine some light on this for me? Thanks.