On 2018-04-29, Stuart Longland <stua...@longlandclan.id.au> wrote: > The rack has 5 servers, a ARM-based PC and the switch, all of which run > from a pair of 12V 105Ah AGM batteries, charged from mains power and > solar. Switch is a Linksys LGS326-AU. No other devices plugged into > this switch have connectivity issues. > > The port the industrial PC is connected to is a plain access port with > no VLAN tagging, trunking or other funny stuff (although all of the > above get used elsewhere in the network). > > When the link drops out, there's nothing in `dmesg`. If I tether my > phone and hit the machine via SSH, I find it is unable to ping anything > on the internal network via IPv4 or IPv6, or vice versa.
What does "ifconfig rl0" show, both normally and when this happens? How about "netstat -nI rl0"? Is anything logged on the switch? This model has things like broadcast storm control, I'm wondering if that might have triggered or if it shows anything else useful. Can you try a different cable, can you try a different switch port? > Is there some sort of debugging flag I can turn on in the kernel to log > more detail about what's going on with rl0 when the loss of connectivity > is being experienced? I don't see any extra debugging that can be enabled for rl.
