[arm-allstar] Rpi 3 network issues

[David McGough]

Hi Richard,

One possibility might be an IP address conflict or a switch/router that 
needs power cycling---perhaps MAC address or ARP cache poisoning due to 
something flaky....I have never seen this behavior with RPi2/3 boards, 
but once had a crazy issue like this with microwave hardware. It ended 
up being a cheap, failing 10/100 switch.

73, David KB4FXC


On Fri, 28 Oct 2016, Richard Bateman via arm-allstar wrote:

> Hi all,
> 
> I've run into a really strange problem and I am completely out of ideas how
> to solve it myself, so I thought I'd ask the group.
> 
> I just changed over from the "stock" allstar pi firmware to the latest for
> rpi 3 that I downloaded from hamvoip.org and for the most part things are
> working well, but after I got home from installing it and tried to access
> it on the network I found some weird issues.
> 
> If I do a continuous ping to the pi it will respond for maybe 20-25 times,
> then it'll stop responding for a bit, and then it will come back on again
> and that will continue to go up and down as long as I keep pinging it.  I
> have two controllers at that site and they don't go up and down together;
> sometimes both are up, sometimes only one.  At first I thought it was the
> wireless link (it's a mountain-top repeater) but I can access other things
> on the remote network just fine.
> 
> I've verified that the temperatures are fine on both devices and I can't
> find any evidence that the switch isn't working correctly; the weirdest bit
> is that I didn't notice it when I was up there, and now it's nearly
> unusable because I can't keep a ssh session going long enough to
> reconfigure things.  It's as though it's an issue that only crops up when
> going across the wireless bridge, and only on the raspberry pis.
> 
> Anyone have any ideas what might be causing it?
> 
> Thanks in advance,
> 
> Richard
> KD7BBC
>