On 1/27/19 7:48 AM, Patrick O'Callaghan wrote:
Same here. To eliminate some variables, I turned off my dnsmasq service, disabled it and rebooted. The problem is still there: for a few moments the guests are network-reachable, then they aren't. They may come back, they may not. Or one does and the other doesn't. It's completely unpredictable. If I could even figure out which component is causing the problem I could BZ it, but nothing stands out.
I'll keep looking but I'm seriously considering a complete system reinstall, something I haven't done in about 5 years, in case some cruft from earlier iterations of Fedora is somehow lurking in the shadows.
Well, I can't say that I've ever seen "intermittent" problems like that caused by SW. But since the host and guest are on the same HW it seems to be the only thing that makes sense.
The only thing that comes to mind is that communication on a LAN with IPv4 takes place based on the MAC address and ARP request/response. If somehow guest obtained the same MAC address for their interfaces one may see odd behavior.