Ticket Number: HEA-NOC/20071231-3 Ticket Status: UPDATE
Ticket Type: unscheduled Resolver: Global Crossing
Ticket Opened: 20071231 11:19 UTC Problem Start: 20071207 00:00 UTC
Ticket Update: 20080212 12:10 UTC Problem End:
Site/line: DNS, IPv6
SixXS report that both a & b.gtld-servers.net are unreachable from HEAnet
over IPv6. This is confirmed with failed traceroutes and dig attempts to
Slower IPv6 lookups due to timeout delays.
20071231 11:11 BN Confirmed that there are no filters in place in HEAnet.
Route exists via GX, but traffic appears to be filtered. While the
servers do filter ICMP, they are also timing out when a dig is attempted
via IPv6. A query has been sent to GX detailing the problem.
20071231 16:14 BN Further investigation suggests this may be a larger
problem with several IPv6 hosts affected. Investigations are ongoing.
20080102 09:30 BN Issue seems to be entirely due to an accidental
configuration change on GX's part. This has been corrected and all
previously unreachable end hosts can now be contacted.
20080208 09:51 BN This problem has reoccurred and GX have been contacted
20080212 11:59 PC - The two servers became reachable again on Saturday 9th
Feb. Will continue to monitor and close the ticket when the link has
remained stable for a period of 1 week.
Time to Fix:
This ticket can be monitored at http://www.hea.net/tickets/20071231-3
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