As of yesterday, the chromecast ultra that I have happily used up till
then no longer respects DNS settings via DHCP/RA and what's worse, keeps
spamming connection attempts despite the firewall properly sending
replies that the route is not available...
Likewise I am sorry for the delay, I have been fairly busy.I don't
really care about how often it attempts to ping google's servers, the
problem is that it refuses to use the DHCP configured DNS. The
chromecast just ignores it an tries to use 220.127.116.11...