Yes clients had both IPs in their relative DNS configuration settings. Aaron Childs, CCNA Associate Director, Networking Information Technology www.westfield.ma.edu/it Please Note: new e-mail address - aaron@westfield.ma.edu -----Original Message----- From: christopher.morrow@gmail.com [mailto:christopher.morrow@gmail.com] On Behalf Of Christopher Morrow Sent: Thursday, December 05, 2013 11:09 AM To: Childs, Aaron Cc: Ulf Zimmermann; nanog@nanog.org Subject: Re: Comcast DNS Issue? On Thu, Dec 5, 2013 at 11:02 AM, Childs, Aaron <aaron@westfield.ma.edu> wrote:
Our issue was that 75.75.75.75 was not responding to queries at all and for some reason clients weren't getting redirected to 75.75.76.76.
did the clients not have 75.75.76.76 in their resolv.conf (or equivalent) as the second nameserver entry? that 'redirect' is the host-os knowing it has more than one 'nameserver' to ask questions of, right? so without the config... you are SOL.