Resolved: www.psu.edu IPv6 Addresses Not Responding
From 5:30am until 8:04am the IPv6 addresses for www.psu.edu were not responding due to a network caching error. After clearing the cache, the IPv6 addresses started working as expected.
More information: Resolved: www.psu.edu IPv6 Addresses Not Responding
Story added 14. August 2014, content source with full text you can find at link above.