KDDI Explains Data Outage and Actions

A recent presentation by Takashi Tanaka (picture), President, KDDI, explaining the network service outages and the action taken.

• A reset bug related to fragmentation processing (April 27) caused 6:17 hours of service loss, affecting 590K subscribers.
  
• Hardware failure occurred when uploading to one MME port a correction file to resolve the failure that occurred on April 27. caused two days later 18:43 hours of outage, affecting 560K subscribers
  
• Trying to fix it again, on April 30, caused 9:58 hours of outage, affecting 640K subscribers.