I have installed the latest version of the LEDE software 17.01.2 onto my Homehub 5a.
I have entered all the info onto the box, port forwards, ISP VDSL2 info etc.
When I connected the box up I can see that the VDSL is connected and up in the summary.
From the start (I don't know if this is normal or not for a fresh install) however the WAN (VDSL), LAN and wireless were three separate entities and can't see/talk to each other.
I have managed to get the LAN and Wireless to now talk to each other and obtain DHCP IP addresses. The last problem (the big one) is that neither the LAN or the wireless can connect to the internet (via the VDSL modem). I am sure it will be something very simple as I can't seem to find it.
If your ISP uses PPPoE, you need to check first whether they will allow concurrent PPPoE sessions; my ISP does not, so I could share connections only behinf my pppoe client...
Temporarily use 2nd wan ip to confirm Steam server accessibility. PortForward.com and grc.com and others have port checking facilities, using just the one wan ip.