I've been trying to configure the resolver to wait 10 seconds for response before checking the next nameserver. These are very slow DNS during the day and I need to wait extra long for them to respond to an A? inquiry. I use the following line in my resolv.conf:
which seems to be correct according to the manpage for resolv.conf. Yet when I view the packets in tcpdump I observe that all three DNS are quickly checked one after another, with a five second pause between each set of three. At no time is there a ten second pause.
I've tried values up to 1000 with no apparent effect.
Any thoughts? Other than the Internet is rather useless without a DNS and 0230 is very late to be logging in just to have exclusive use of one.