Re: Ethernet over mains power experience
I'm detecting the variation using ping. I did quite an extended experiment over a number of days unplugging all of the devices on the mains, which eventually removed the problem, but made the house dark, cold and quiet :-) Small 'wart' chargers were a particular cause of noise (eg wii games, phone chargers).
However, I'd have thought that such noise should be filtered out - and this is really what I'm trying to establish: is the RTT variation that I'm seeing typical of ethernet over mains, or unusual.
Traceroute does not show me much as I'm not sure that the protocol stacks on the half bridges are responding at the same rate as the through traffic. (this seems to be the common behaviour of low cost devices).
[failfast includes logging the failure - I'll drop this tho' as I don't think it's a useful discussion point]
I don't think that there's a specific connection problem, but there could be - it is an oldish house - but I'd expect a more regular pattern of noise for a poor connection.