@David-TP 

Hi, yes, that's correct, but I suspect that the issue is with the bonjour discovery of the shares rather than the AFP itself. I have worked around the issue by using an SMB3 shared from the NAS and mounting that directly on the mac allows the time machine backup to use the share without bonjour, and so works via the deco, but any other bonjour discovery (such as printers etc) would probably not work.

Thanks

William

  @David-TP 

Apologies for the delay in responding to this; I was away last week. The issue does appear to be with bonjour discovery. The 'Discovery' mac app shows what can be discovered via bonjour, and this shows a drastically reduced set of visible things when connected via the Deco, as oppoesed to the set seen when connected via a wired connection or via the old pre-deco wifi setup that I had. Some screen shots of the discovery app:

When connected via Deco:

When connected via wired network:

When connected via old wifi:

For completeness, to answer your earlier questions, a screenshot of the Deco app:

and the NAS (and old wifi) are connected to the same wired network that the 'Living Room' deco node is (and the mac is also connected to that deco node).

Thanks

William