Ticket Number: HEA-NOC/20020806-02 Ticket Status: UPDATE
Ticket Type: Unscheduled Ticket Source: HEA-NOC
Ticket Scope: Line Site/Line: HEAnet <==> Abilene
Ticket Owner: [log in to unmask] Problem Fixer: HEA-NOC
Ticket Opened: Problem Start: 20020806 01:15 UTC+1
Ticket Closed: Problem End: 20020806 18:20 UTC+1
Unable to reach sites connected to internet 2 at the minute
Phobos sees routes from abilene and can traceroute to I2 sites.
Traceroutes from with heanet fail at phobos. Traffic to DFN and
some other GEANT peers also affected.
Traffic from HEAnet to some US & European academic sites.
20020806 1500 Asymetric paths between ourselves and abilene, return path via geant, packets being droped on ie1.ie.geant.net, geant noc are investigating.
Abilene are going to adjust their local prefs to fix asymetric flow.
20020806 18:20 davew
This problem is due to coincidence of two separate issues -
asymmetric routing at Abilene and failure of a GEANT router to
forward packetes. GEANT have implenented a workaround by forwarding
our traffic through France and all sites are now reachable. Ticket
remains open while Abilene investigate asymmetric routing and
GEANT work on a permanent fix.
Time to Fix: