OK - so we've double checked and re-seated the boards and  done some 
diagnostics. We've found the following:

* On the new board, which contains nodes 8, 9, 10 and 11, only 9 and 10 
consistently come up and get served an ip address based on their MAC address. 
Nodes 8 and 11 don't always show up when trying to probe MAC addresses.

* Nodes 12, 13, 14 and 15 are showing up on a macaddr lookup consistently, but 
only sometimes being served an ip address.

* If we probe nodes in the 12-15 range, it sometimes brings them to life.

So, conclusions:

* The new board has only 2 nodes that work consistently
* The board with nodes 12->15 is not behaving.

On a side note, we've noticed that several nodes don't consistently get served, 
but the ones detailed are the worst offenders.

Not totally sure where to go from here.

Dave

On 5 Jun 2013, at 09:57, Dave Pigott <[email protected]> wrote:

> Something very odd here, post the broken node replacement. Matt and I are 
> investigating and need exclusive access today, because we need to power cycle 
> it, probably more than once.
> 
> Thanks
> 
> Dave
> 
> On 4 Jun 2013, at 21:45, Matthew Gretton-Dann 
> <[email protected]> wrote:
> 
>> 
>> Node 16: 192.168.1.111
>> Node 17: 192.168.2.126
> 

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