Clients didn't switch to secondary DNS server during fail over

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http://serverfault.com – I have two internal dns servers set up and all my servers have both of them in the resolv.conf Our main dns server went down and suddenly no server could see each other. I edited a few of the servers resolv.conf manually and committed out the first (down) dns server and that machine would instantly be able to ping again. What did I do wrong, does it not auto switch to the secondary dns server when it times out? # File managed by puppet nameserver nameserver ;nameserver domain example.com search example.com (HowTos)