I know is not advisable, but I need to see the options available for this scenario.
I have about 30 remote sites (some connected via Internet IPsec tunnels and some via Wireless links).
I need to propagate a VLAN through the WAN sites for Avaya IP phones.
I've seen that L2TPv3 is an option for propagating a VLAN across a WAN (not depending on the SP) but it supports Frame Relay, Ethernet, 802.1q, HDLC, PPP (so does it support an underlying Wireless link?)
Is there any other option considering I don't want to depend on the SP and we're not using MPLS?
Thank you for any help.