Hi,

The latest position is that I did find an update for the router firmware, which has loaded successfuly, and made absolutely no difference! I also tried alternative router ports, similarly with no effect.

I've still to try speed/ duplex settings, but at the moment I'm monitoring things having re-routed the connection between the router and computer. I've got an 8 port gigabit unmanaged switch (TP-Link) which normally links 3 printers to the router. Following your suggestion about using the old router as a switch, I've simply plugged the computer into the switch and am now awaiting developments. With the number of diconnects and re-syncs I was getting with the old router, I have serious doubts about its fitness for purpose, although it has given several years' stirling service.

I'll update again as things develop.

Cheers

!!SUCCESS!!

It was the switch wot sorted it! Simply transferring the computer network cable from the router to the switch has caused the downstream trace to go completely flatline, but in a really good way. I've had two interruptions since making that change, one nic disconnect during this morning's start-up sequence, which is probably normal and certainly no problem, and one after midday, when I went back to auto IP acquisiton (followed by reboot).

So, good call vimto_girl. My thanks to you and all who contributed.

Not all flatlining is bad...

Mike

Edited by Mygri (Fri 14-Feb-14 15:55:53)

In reply to a post by Mygri:

So, good call vimto_girl. My thanks to you and all who contributed.

Glad you solved it (fingers crossed)!