Unified - Internet2 Advanced Layer 2 Service Network Operations Report
08/17/2015 - 08/23/2015

Unified - Internet2 Advanced Layer 2 Service Network Operations Center
at Indiana University

New Connections

None


Upgrades

None


New Network Resources

None


Unscheduled Outages Summary

Ticket Number Customer Impact Network Impact Title Outage Type Source Of Impact Start Time (UTC) End Time (UTC)

52274-Normal Brief Outage Resolved - I2 Optical Various Circuits Human ErrorVendor 08/20/2015 4:43 PM 08/20/2015 4:45 PM
52334-Normal Brief Outage Resolved - I2 AL2S Backbone EQCH-MINN Cut or Damaged FiberVendor 08/20/2015 7:07 PM 08/20/2015 7:08 PM
52414-Normal 1-Critical Brief Outage Resolved - I2 Optical DWDM System ASHB-PITT Cut or Damaged FiberVendor 08/21/2015 1:11 PM 08/21/2015 1:15 PM
52494-Normal 1-Critical Brief Outage - I2 Optical DWDM System SACR-SUNN InvestigatingVendor 08/21/2015 7:05 PM 08/21/2015 7:06 PM
52574-Normal 1-Critical Outage Resolved - I2 Optical DWDM System ASHB-PITT Unannounced MaintenanceVendor 08/22/2015 5:37 AM 08/22/2015 8:15 AM
08/22/2015 10:03 AM 08/22/2015 10:18 AM
52604-Normal Brief Outage - I2 AL2S Backbone CHIC-COLU4 UndeterminedVendor 08/22/2015 1:30 PM 08/22/2015 1:31 PM

Unscheduled Outages Detail


Ticket No.:5227:144
Subject:Brief Outage Resolved - I2 Optical Various Circuits
Source Of Impact:Vendor
Affected:AL2S Backbone RENO-SUNN
IP Backbone LOSA-SEAT
Optical Member ESNet
Optical Member CENIC
Optical Member University of Oregon
Start Time:Thursday, August 20, 2015, 4:43 PM (1643) UTC
End Time:Thursday, August 20, 2015, 4:45 PM (1645) UTC
Description:The above listed optical circuits was briefly unavailable. Internet2 Engineers have advised that this issue was related to a fiber bump in the Sunnyvale, CA area. No further outages are expected.

Ticket No.:5233:144
Subject:Brief Outage Resolved - I2 AL2S Backbone EQCH-MINN
Source Of Impact:Vendor
Affected:AL2S Backbone EQCH-MINN
Net+ Provider Code42
Start Time:Thursday, August 20, 2015, 7:07 PM (1907) UTC
End Time:Thursday, August 20, 2015, 7:08 PM (1908) UTC
Description:The above listed asset is available after a brief outage. Internet2 Engineers have investigated the cause and determined the reason for the outage was due to a fiber bump. Workgroup administrators received notifications from OESS regarding circuits re-routed on the backbone.

Ticket No.:5241:144
Subject:Brief Outage Resolved - I2 Optical DWDM System ASHB-PITT
Source Of Impact:Vendor
Affected:DWDM System ASHB-PITT
AL2S Backbones ASHB-PITT and ASHB-CHIC
IP Backbones ATLA-CLEV and CLEV-WASH
Connector 3ROX (ASHB)
Start Time:Friday, August 21, 2015, 1:11 PM (1311) UTC
End Time:Friday, August 21, 2015, 1:15 PM (1315) UTC
Description:The above listed assets are currently available. The Internet2 Fiber Vendor has indicated that this issue was caused by partial fiber damage between Cumberland, MD and Uniontown, PA. Level(3) engineers migrated affected services to spare fiber and no further outages are expected.

Ticket No.:5249:144
Subject:Brief Outage - I2 Optical DWDM System SACR-SUNN
Source Of Impact:Vendor
Affected:DWDM System SACR-SUNN
AL2S Backbone(s) PORT-SUNN and RENO-SUNN
IP Backbone(s) LOSA-SEAT
Optical Member CENIC
Optical Member University of Oregon
Start Time:Friday, August 21, 2015, 7:05 PM (1905) UTC
End Time:Friday, August 21, 2015, 7:06 PM (1906) UTC
Description:The above listed assets were briefly unavailable to the community. Level (3) Communications Engineers are currently investigating the reason for the outage. No ETR is available at this time. Updates will be provided as they are received.

Ticket No.:5257:144
Subject:Outage Resolved - I2 Optical DWDM System ASHB-PITT
Source Of Impact:Vendor
Affected:DWDM System ASHB-PITT
AL2S Backbones ASHB-PITT and ASHB-CHIC
IP Backbones ATLA-CLEV and CLEV-WASH
Connector 3ROX (ASHB)
Start Time:Saturday, August 22, 2015, 5:37 AM (0537) UTC
End Time:Saturday, August 22, 2015, 8:15 AM (0815) UTC
Start Time:Saturday, August 22, 2015, 10:03 AM (1003) UTC
End Time:Saturday, August 22, 2015, 10:18 AM (1018) UTC
Description:The above listed assets are currently available to the community. Level (3) Communications Engineers have completed repairs and services have stabilized. No further outages are expected.

Ticket No.:5260:144
Subject:Brief Outage - I2 AL2S Backbone CHIC-COLU4
Source Of Impact:Vendor
Affected:AL2S Backbone CHIC-COLU4
Start Time:Saturday, August 22, 2015, 1:30 PM (1330) UTC
End Time:Saturday, August 22, 2015, 1:31 PM (1331) UTC
Description:The above listed asset is available after a brief outage. Internet2 Engineers have investigated and the reason for the outage was undetermined. Workgroup administrators received notifications from OESS regarding circuits re-routed on the backbone.

Scheduled Maintenances Summary

Ticket Number Customer Impact Network Impact Title Maintenance Type Source Of Impact Start Time (UTC) End Time (UTC)

None during this report period

Downtime and Availability



Unified - Internet2 Advanced Layer 2 Service Core NodesDown TimeReporting Period Availability52 Week Availability
sdn-sw.albu.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000% 100.00000%
sdn-sw.alba.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000% 100.00000%
sdn-sw.ashb.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.94365% 99.94365%
sdn-sw.atla.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99260% 99.99298%
sdn-sw.bato.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000% 100.00000%
sdn-sw.bost.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000% 100.00000%
sdn-sw.char.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99639% 100.00000%
sdn-sw.chic.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99924% 99.99962%
sdn-sw.clev.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99867% 100.00000%
sdn-sw.colu4.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.98900% 100.00000%
sdn-sw.dall.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000% 100.00000%
sdn-sw.denv.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.98710% 99.99051%
sdn-sw.elpa.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99772% 100.00000%
sdn-sw.eqch.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99602% 100.00000%
sdn-sw.houh.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000% 100.00000%
sdn-sw.jack.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99791% 100.00000%
sdn-sw.jcsn.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000% 100.00000%
sdn-sw.kans.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99184% 100.00000%
sdn-sw.losa.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99715% 100.00000%
sdn-sw.minn.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000% 100.00000%
sdn-sw.miss2.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000% 100.00000%
sdn-sw.newy32aoa.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000% 100.00000%
sdn-sw.phil.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000% 100.00000%
sdn-sw.phoe.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99905% 99.99924%
sdn-sw.pitt.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99886% 100.00000%
sdn-sw.port.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000% 100.00000%
sdn-sw.rale.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99602% 99.99848%
sdn-sw.salt.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99696% 100.00000%
sdn-sw.seat.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99355% 99.99848%
sdn-sw.star.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.98937% 99.99924%
sdn-sw.sunn.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99583% 100.00000%
sdn-sw.tuls.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99526% 100.00000%
sdn-sw.wash.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99658% 99.99981%
sdn-srv2.chic.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.86282% 100.00000%
sdn-srv3.chic.net.internet2.edu 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.86282% 100.00000%

Aggregate Unified - Internet2 Advanced Layer 2 Service Core Nodes0 hr 0 min0 hr 0 min100.00000%100.00000%99.98784%99.99777%

NOTE: Numbers in italics represent downtime with scheduled maintenance excluded. Internet2's definition of scheduled maintenance is any anticipated outage announced at least 72 hours in advance of the outage start time.

Unified - Internet2 Advanced Layer 2 Service Backbone CircuitsDown Time Reporting Period Availability52 Week Availability
I2-ALBA-BOST-100GE-09210 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99791%99.99905%
I2-ALBA-CLEV-100GE-07735 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.98994%99.99715%
I2-ASHB-CHIC-100GE-11803 2 hr 57 min2 hr 57 min 98.24405%98.24405% 99.83645%99.94858%
I2-ASHB-PITT-100GE-07737 2 hr 57 min2 hr 57 min 98.24405%98.24405% 99.92486%99.94441%
I2-ASHB-WASH-100GE-09106 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.93264%99.94915%
I2-ASHB-WASH-100GE-11823 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.92031%99.97723%
I2-ATLA-CHAR-100GE-07739 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000%100.00000%
I2-ATLA-CINC-100GE-07740 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.96357%99.99981%
I2-ATLA-HOUH-10GE-07742 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000%100.00000%
I2-ATLA-JACK-100GE-07739 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.89735%99.99431%
I2-ATLA-JCSN-100GE-10734 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000%100.00000%
I2-ATLA-JCSN-100GE-10784 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.82582%99.99886%
I2-ATLA-CHAR-100GE-07738 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.90342%99.99981%
I2-BATO-HOUH-100GE-08860 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.94156%99.99715%
I2-BATO-JACK-100GE-11005 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.40726%99.72241%
I2-BOST-HART2-100GE-09211 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.98994%99.99791%
I2-CHAR-RALE-100GE-10633 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.87458%99.88065%
I2-CHIC-INDI-100GE-50993 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.93207%99.93245%
I2-CINC-INDI-100GE-51692 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.97173%99.99962%
I2-CHIC-COLU4-100GE-11554 0 hr 1 min0 hr 1 min 99.99008%99.99008% 99.88217%99.97382%
I2-CHIC-KANS-100GE-07745 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.93264%99.99810%
I2-CHIC-STAR-100GE-07743 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.97476%99.99886%
I2-CLEV-EQCH-100GE-07736 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.94915%99.99981%
I2-CLEV-NEWY32AOA-100GE-07735 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000%100.00000%
I2-CLEV-PITT-100GE-10334 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.98767%100.00000%
I2-CLEV-STAR-100GE-07736 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000%100.00000%
I2-COLU4-KANS-100GE-11548 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.92999%99.98539%
I2-DALL-HOUH-100GE-07751 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.69224%99.86016%
I2-DALL-TULS-100GE-11300 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.96452%100.00000%
I2-DENV-ELPA-100GE-07748 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.98311%99.98918%
I2-DENV-KANS-100GE-07746 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.92733%99.99013%
I2-DENV-SALT-100GE-07747 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.91253%99.97040%
I2-ELPA-HOUH-100GE-07749 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.52451%99.64557%
I2-ELPA-PHOE-100GE-07750 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000%100.00000%
I2-ELPA-TUCS-100GE-07750 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99753%99.99981%
I2-EQCH-STAR-100GE-09299 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.95124%99.99924%
I2-EQCH-MINN-100GE-12184 0 hr 1 min0 hr 1 min 99.99008%99.99008% 99.96812%99.99715%
I2-HART2-NEWY32AOA-100GE-12947 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99753%99.99981%
I2-HOUH-HOUS-100GE-09379 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.73342%99.80286%
I2-HOUH-JCSN-100GE-10783 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.70268%99.80495%
I2-HOUH-TULS-100GE-07751 0 hr 0 min0 hr 0 min 100.00000%100.00000% 100.00000%100.00000%
I2-KANS-MINN-100GE-12675 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99867%99.99981%
I2-KANS-TULS-100GE-07753 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.93207%99.94972%
I2-LASV-LOSA-100GE-53802 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.98596%100.00000%
I2-LASV-SALT-100GE-07757 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.98596%100.00000%
I2-LOSA-PHOE-100GE-09190 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.80248%99.82620%
I2-LOSA-SUNN-100GE-07755 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99298%100.00000%
I2-MINN-MISS2-100GE-09130 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.04201%99.20518%
I2-MISS2-SEAT-100GE-13237 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.89033%99.89811%
I2-NEWY23AOA-PHIL-100GE-07759 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.98956%100.00000%
I2-PHIL-WASH-100GE-10867 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.91462%99.96167%
I2-PHOE-TUCS-100GE-11990 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99639%99.99905%
I2-PORT-SEAT-100GE-08997 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.95389%99.99753%
I2-PORT-SUNN-100GE-10343 0 hr 1 min0 hr 1 min 99.99008%99.99008% 99.88084%99.88616%
I2-RALE-WASH-100GE-08888 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.98122%99.99772%
I2-SALT-SEAT-100GE-08998 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.99013%99.99810%
I2-RENO-SALT-100GE-53725 0 hr 0 min0 hr 0 min 100.00000%100.00000% 99.98577%100.00000%
I2-RENO-SUNN-100GE-07766 0 hr 3 min0 hr 3 min 99.97024%99.97024% 99.73133%99.74556%

Aggregate All Unified - Internet2 Advanced Layer 2 Service Backbone Circuits 6 hr 0 min0 hr 0 min 99.93842%99.93842% 99.90301%99.94515%


NOTE: Numbers in italics represent downtime with scheduled maintenance excluded. Internet2's definition of scheduled maintenance is any anticipated outage announced at least 72 hours in advance of the outage start time.



Upcoming Scheduled Maintenances

Ticket No.:5218:144
Subject:Maintenance *Tracking* 2 of 2 - I2 Various Circuits
Affected:CA*Net/CANARIE
Net+ Provider Code42
Start Time:Thursday, August 27, 2015, 6:00 AM (0600) UTC
End Time:Thursday, August 27, 2015, 11:00 AM (1100) UTC
Description: Internet2's Optical circuits should remain available while Zayo Engineers perform power maintenance. An outage is not expected; however, the entire maintenance window has been reserved. This is a backup window, to be used if necessary.

Ticket No.:5135:144
Subject:Maintenance - I2 AL2S Backbone Various Circuits
Affected:AL2S Backbone DENV-KANS
AL2S Backbone PORT-SUNN
AL2S Backbone DENV-ELPA
IP Backbone KANS-SALT
IP Backbone LOSA-SEAT
Start Time:Friday, August 28, 2015, 4:00 AM (0400) UTC
End Time:Friday, August 28, 2015, 10:00 AM (1000) UTC
Description: The above listed asset will be unavailable while Level 3 Engineers perform maintenance. An outage of up to 6 hours is expected. The entire window is reserved. Backbone traffic will re-route during this maintenance. Workgroup administrators will receive notifications from OESS regarding circuits re-routed on the backbone.

Ticket No.:5274:144
Subject:Maintenance - I2 Optical Circuits I2-COLU4-KANS-100GE-11579 and I2-COLU4-SAIN-100GE-11580
Affected:AL2S Backbone COLU4-KANS and COLU4-SAIN
Start Time:Friday, August 28, 2015, 5:00 AM (0500) UTC
End Time:Friday, August 28, 2015, 10:00 AM (1000) UTC
Description: The above listed assets may be unavailable while MOREnet Engineers perform maintenance. A brief outage is expected, however the entire maintenance window has been reserved.

Ticket No.:4955:144
Subject:Maintenance - I2 Various Optical Circuits (Northern Tier)
Affected:Backbone MISS2-SEAT
Start Time:Saturday, August 29, 2015, 2:00 PM (1400) UTC
End Time:Sunday, August 30, 2015, 12:00 AM (0000) UTC
Description: The above listed assets will be unavailable while Zayo Group's third party vendor relocates fiber. An outage up of up to an hour is expected; however the entire window has been reserved. Backbone traffic will re-route during this maintenance. Workgroup administrators will receive notifications from OESS regarding circuits re-routed on the backbone.

Ticket No.:4436:144
Subject:Maintenance - I2 Optical Various Circuits (MINN)
Affected:AL2S Backbone MINN-MISS2
Optical Member Canarie/CA*net
Net+ Provider Code42
Start Time:Sunday, August 30, 2015, 1:00 PM (1300) UTC
End Time:Sunday, August 30, 2015, 10:00 PM (2200) UTC
Description: The above listed asset will be unavailable while fiber providor performs maintenance. An outage of 3 hours is expected. The entire window is reserved. Backbone traffic will re-route during this maintenance. Workgroup administrators will receive notifications from OESS regarding circuits re-routed on the backbone.

Ticket No.:5302:144
Subject:Maintenance - I2 Optical Member ESNet
Affected:
Start Time:Monday, August 31, 2015, 12:00 PM (1200) UTC
End Time:Friday, September 4, 2015, 10:00 PM (2200) UTC
Description: Member ESNet's above listed optical circuits will be unavailable while CenturyLink performs maintenance to relocate fiber. Multiple 10 minute outages are expected during the window. The entire maintenance window has been reserved.

Ticket No.:5112:144
Subject:Maintenance - I2 Optical Member NOAA N-Wave
Affected:
Start Time:Tuesday, September 1, 2015, 4:00 AM (0400) UTC
End Time:Tuesday, September 1, 2015, 9:00 AM (0900) UTC
Description: Member NOAA N-Wave's Optical circuit I2-PITT-WASH-10GE-07664 will be unavailable while N-Wave Engineers perform maintenance. A brief outage is expected, however the entire maintenance window has been reserved.

Ticket No.:5266:144
Subject:Maintenance Update - I2 Optical Various Circuits
Affected:CA*Net/CANARIE
Net+ Provider Code42
Start Time:Tuesday, September 1, 2015, 6:00 AM (0600) UTC
End Time:Tuesday, September 1, 2015, 11:00 AM (1100) UTC
Description: Zayo's above optical circuits may be unavailable while Zayo Engineers performs power maintenance. No outage is expected, however the entire maintenance window has been reserved.

Ticket No.:5113:144
Subject:Maintenance - I2 Optical Member NOAA N-Wave
Affected:Optical Member NOAA
Start Time:Wednesday, September 2, 2015, 4:00 AM (0400) UTC
End Time:Wednesday, September 2, 2015, 9:00 AM (0900) UTC
Description: Member NOAA N-Wave's Optical circuit I2-PITT-WASH-10GE-07664 will be unavailable while N-Wave Engineers perform maintenance. A brief outage is expected, however the entire maintenance window has been reserved.