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Network Outage due to Emergency Maintenance Work on Core Network Equipment (November and December, 2022)

The following emergency maintenance work will be performed on the Keio University backbone network equipment.
During the work, communications on the affected campuses will be affected.

Subject and Impact

The period of time affected is the current schedule and may change depending on the details of the work.

(1) Yagami Campus

Period: Sunday, November 20, 2022, from 8:00a.m. to 3:00p.m.
Scope: Yagami Campus and Shinkawasaki Town Campus(K2)
Description: Maintenance suspension of core network equipment
Details: Two 30-minute outages during the above period (scheduled around 9:00a.m. and 2:00p.m.)


(2) Shiba-Kyoritsu Campus

Period: Sunday, November 27, 2022, from 8:00a.m. to 3:00p.m.
Scope: Shiba-Kyoritsu Campus
Description: Maintenance suspension of core network equipment
Details: Two 30-minute outages during the above period (scheduled around 9:00a.m. and 2:00p.m.)


(3) Hiyoshi Campus

Period: Sunday, December 11, 2022, from 8:00a.m. to 3:00p.m.
Scope: Hiyoshi Campus (including satellites such as the West Annex)
  • Organizations using SINET L2VPN via Hiyoshi
  • Osaka City Campus (KOCC)
  • Tsuruoka Town Campus (TTCK)
  • Tonomachi Town Campus (Wireless WiFi connection only)
  • (All Campuses) Wireless WiFi connection via eduroam
  • (All Campuses) Use of certificate issuing service at convenience stores
Description: Maintenance suspension of core network equipment
Details: Two 30-minute outages during the above period (scheduled around 9:00a.m. and 2:00p.m.)


(4) Mita Campus

Period: Sunday, December 18, 2022, from 8:00a.m. to 3:00p.m.
Scope: Mita Campus
Description: Maintenance suspension of core network equipment
Details: Two 30-minute outages during the above period (scheduled around 9:00a.m. and 2:00p.m.)
Notes:
  • Planned power outage on Mita Campus is scheduled on the same day due to electrical facility security check. Please check the campus information for details.
  • In conjunction with the outage in the Mita area, business system (ADST) services in all areas may be partially suspended.


(5) Shonan Fujisawa Campus

Period: Sunday, December 18, 2022, from 8:00a.m. to 3:00p.m.
Scope: Shonan Fujisawa Campus (including NMC Building and SFC-JS)
Description: Maintenance suspension of core network equipment
Details: 4-5 hours outage during the above period (scheduled from around 9:00a.m. to 2:00p.m.)
Notes:
  • Planned power outage at Shonan Fujisawa Campus is scheduled on the same day due to electrical facility security check. Please check the campus information for details.
  • Communication between SFC (133.27/16, 2001:df2:c900::/48) and outside the campus is available.
    Communication within the campus (131.113/16, 2001:df0:eb::/48) is not possible.
  • There may be a separate outage due to maintenance work on the SFC-CNS side.


(6) Shinanomachi Campus

Period: Sunday, December 25, 2022, from 8:00a.m. to 3:00p.m.
Scope: Shinanomachi Campus, organizations using SINET L2VPN via Shinanomachi
Description: Maintenance suspension of core network equipment
Details: Two 30-minute outages during the above period (scheduled around 9:00a.m. and 2:00p.m.)


We apologize for any inconvenience caused and appreciate your understanding and cooperation.

Last-Modified: October 27, 2022

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