I've set up a draytek 130 vdsl same setup .. I found that this exact issue is due to the setup of the draytek.
ensure you have setup the router correctly… and update the fermware to the latest verison
a quick setup (ensure you save the config as asked and conferm settings at end as my draytek lost vlan tag each time)
*** ADSL Connection
Reset router factory defaults
Compete Quick Internet Wizard
Disable PPPoE/PPPoA client (internet access >> PPPoE/PPPoA)
Enable PPPoe Passthrough (internet access >> PPPoE/PPPoA)
*** VDSL connection
Reset router factory defaults
Enable vlan and enter tag (internet access >> general setup)
Disable PPPoE/PPPoA client (internet access >> PPPoE/PPPoA)
On MPoA set (internet access >> MPoA / static or dynamic IP)
a) MPoa (rfc1483/2684) >>> enabled
b) Encapulation >>> 1483 Bridged IP (IPoE)
c) MTU >>> 1492
If vlan is enabled in step 2 then no vlan settings are needed on the pfsense firewall
hope this helps :)
Bodie