On Sunday, June 4, we will perform the maintenance work which causes the backbone network to stop

Maintenance work on the backbone network will be carried out during the following time window.
The network becomes unstable during the maintenance work.
Also, the network may stop for about 20 minutes.

Period: From June 4, 2017 (Sun) 9:30 to June 4, 2017 (Sun) 15:00
Purpose: To investigate what causes failures of backbone network device and take permanent measures against the problem.
Impacted services: Network communication becomes unstable in all areas including remote areas.

There is a possibility that the networking stops occasionally for about 20 to 30 minutes.

Organization for Information Infrastructure
Department of Academic Information
Division of Information Infrastructure Management