Homeplug drop-out (no DHCP offer)

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23 Sep 2012
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Hi all, this is my first post here. I'm really hoping somebody can shed some light on a problem I'm having. Thanks in advance for reading.

I bought my first homeplug to connect a headless Mac Mini to my home network over ethernet. The connection can be fine for a day or two and then drops and doesn't reconnect. If I put it under load by transferring a bunch of data over the network it can drop in as little as 30 mins.

Looking at the log on my router, after the connection drops I can see that:

The client correctly does a DHCP discovery.
The router correctly sends a DHCP offer.
But the client does not respond with a DHCP offer.
The log just shows an endless series of the client sending a DHCP discover and the router replying with a DHCP offer.

On the Mac Mini, once the connection has dropped, in the network diagnostics it shows the following statuses:

Ethernet - green
Network Settings - amber
ISP - green
Internet - red
Server - red

or I see:

Ethernet - green
Network Settings - green
ISP - red
Internet - red
Server - red

When it is working correctly all these are green.

My homeplug is Devolo dLAN 500 AV plus at the router end and a dLAN 500 AVtriple+ at the client end (bought together as a starter kit).
My router is Billion BiPAC 7800N Dual WAN ADSL2+/Broadband Wireless-N Gigabit Firewall Modem Router.
Belkin cat6 ethernet cables, but tried various different ones.
Latest firmware on both Devolo and router.

I've tried another router with no change. I can swap the homeplugs for another pair (TP-Link AV200) and those work fine. When I swap back to the Devolos they die soon after. If I swap back to the TP-Links they are fine again.

Any thoughts? I'd really like to know if the Devolos are faulty or if this could be a configuration issue.

Many thanks.
 
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