Read this please, before assuming your AirPort Extreme is broken. The links at the end will likely resolve your issues. First try to rollback your AirPort's firmware to 6.1.1, which should restore your Internet connectivity. If it does, but you'd rather have the most recent upgrade available, follow the steps given in the following links, 6.1.3 should work fine for you then.
After numerous attempts by apple IT reps to persuade me that my modem was somehow the cause of my AirPort Extreme broadcasted WiFi network suddenly losing connectivity after the 6.1.3update, I found the truth that helped me to correct my own problem, and successfully use 6.1.3 rather than the rolled back version 6.1 i had been forced to resort to.
If rolling back your Airport's firmware fixes your connectivity issue, or your dns server has been erased by the update to 6.1.3, I speculate that these links will help you out greatly.
It turned out, that this was A KNOWN ISSUE to Apple! With an actual fix Published by Apple themselves! They've just got it hidden away because they must have wanted to drive me to the brink of insanity. . Luckily for Apple I worked with an amazing rep *(Thelma) who at least acted as if she didn't think I was a crazy person. I found the fix on my own after 16 grueling, redundant and fruitless, hours of troubleshooting (time wasting) with "senior" Apple techs.
Let me tell you, 'I told you so' has never sounded so sweet. (Thelma) was ****** that no one in the company bothered to fill her in on this issue or solution and had her support send me a new AirPort just before I discovered the fix. After the discovery, she told me not to bother sending either back, and apologized for the run around that took up weeks of my life.
With out further ado and with thanks to Softpedia for posting the info-
http://news.softpedia.com/news/Airport-Time-Capsule-7-6-3-Affects-IPv6-Tunneling -328680.shtml
http://news.softpedia.com/news/Apple-Releases-Fix-for-IPv6-Tunnel-Error-Under-Ai rPort-7-6-3-331186.shtml
*name(s) changed to protect the competent
AirPort Extreme 802.11n (5th Gen), iOS 6.1.3
I have this question too (1) Reply Categories: Airport Extreme Tags: airport_extreme, firmware, airport, ipad, wifi, 4, router, extreme, multiple_devices, internet_access, update_error, dns_error, amber_light, no_dns, 6.1.1, roll_back, 6.1.3