Network Status

Current Status

No known network issues

Network Outage - May 19, 2025 - Resolved

There is a fiber cut within the Comcast Network impacting five ICN K12 School Districts in the Chicago area. Comcast is actively working to resolve the issue. This has been resolved

Network Outage - May 2, 2025, – Resolved @ 2:50PM

AT&T replaced failed hardware at CO and service has been restored.

1:40PM - AT&T has engineers working on the issue. No estimated time to restore is available.

12:25PM - An AT&T 100Gbps collector circuit is down causing an interruption of service for multiple schools in the central Illinois area. AT&T engineers have been engaged. We will update this site as additional information becomes available. 

Network Maintenance – May 03, 2025  06:30AM to 08:30AM

Illinois Century Network Engineers will perform software upgrade on Distribution Switch serving the ICN K12 Broadband and Illinois State Police LEADS customers with Comcast last mile circuits on May 03, starting at 06:30AM and concluding by 08:30 AM. During this maintenance window, customers will experience a 30-minute interruption of service on their ICN last mile circuit.

Should you experience problems on your ICN service after this maintenance, please contact our Network Operations Center at 312.814.3648 Option 2 or at Doit.ICN.NOC@Illinois.Gov.

Network Maintenance – April 18, 2025, 11PM

Illinois Century Network Engineers will perform software upgrades on core hardware serving the K12 Broadband Network on April 18, starting at 11:00 PM and concluding by 2:00 AM on April 19. During this maintenance window, customers will experience a 30-minute interruption of service on their ICN last mile circuit.

Should you experience problems on your ICN service after this maintenance, please contact our Network Operations Center at 312.814.3648 Option 2 or at Doit.ICN.NOC@Illinois.Gov.

Frontier Outage “Resolved” - March 24, 2025

Frontier experienced an outage on their network impacting multiple ICN Customers in the Pontiac area on March 24 starting around 3:30PM. Service was restored by 5:30PM.

Network Maintenance – March 30, 2025, 6:00Am – 8:00AM

On March 30, 2025, ICN will perform network maintenance to upgrade software on SDWAN hardware serving K12 Schools and Libraries which are part of the ICN/DoIT E-rate Consortium. Work will begin at 6:00AM and conclude by 8:00AM. During the maintenance there will be an approximately 10 min interruption of service on circuits connecting to the ICN.

Should you experience any issues following the maintenance, please contact our Network Operations Center (NOC) at 312.814.3648 Option 2 or at DoIT.ICN.NOC@Illinois.gov.

Network Maintenance – February 24th 12:01AM – 4:00AM

Comcast will perform network maintenance on February 24th starting at 12:01AM. Some ICN customers with Comcast last mile circuits will experience an interruption of service during this maintenance. Work will conclude by 4:00AM.

Should you experience any issues following the maintenance, please contact our Network Operations Center (NOC) at 312.814.3648 Option 2 or at DoIT.ICN.NOC@Illinois.gov.

February 13, 2025 - 8:30AM Resolved - Reports of service interruptions for sites connecting to the ICN in Paris. Engineers replaced failed card.

Network Maintenance - February 10, 2025 - 12:01AM

AT&T will perform network maintenance on February 10 during their maintenance window of 12:01AM to 5:00AM. K12 Schools and Libraries which are part of the ICN E-rate Consortium may experience an approximately 20 minutes of service interruption on their ICN last mile circuit.

Should you experience problems following this maintenance, please contact our Network Operations Center (NOC) at 312.814.3648 Option 2 or at doit.icn.noc@illinois.net.

Network Maintenance - January 23, 2025 - 12:01AM 

AT&T will perform emergency maintenance on two of their 100Gbps Collector circuits serving 38 ICN schools and libraries in the Chicago region. The work will cause a 10 to 15 minute interruption of service sometime during the maintenance window of 12:01AM to 5:00AM.

If you experience problems following this maintenance, please call our Network Operations Center (NOC) at 312.814.3648 Option 2.

January 10, 2025 – AT&T Outage – Resolved

On January 10, Schools reported extremely slow speeds on their ICN connection. The schools reporting the problem were the same which experienced the collector circuit outage on January 6 and 7. Despite troubleshooting by AT&T engineers, the problems persisted throughout the day January 10. The problems were resolved at 3PM January 11 after AT&T moved the circuit to a new fiber path within their network.

If you continue to experience problems with your ICN connection, please call our NOC at 312.814.3648 Option 2 or email at DoIT.ICN.NOC@Illinois.Gov.

January 7, 2025 - AT&T Outage - Resolved

On January 7, AT&T experienced a card failure in one of their switches at our Chicago POP facility resulting in a failure of an AT&T 100Gbps collector circuit serving 15 of our K12 Districts. Service was restored at 2:15PM following a card replacement.

November 12, 2024 - Outage Resolved

Between 10AM and 11AM, K12 schools began reporting problems reaching cloud content providers including ISCorp, Skyward and Rival5. The issue was resolved by 1:30PM. ICN has confirmed the connectivity problems were caused by problems on the TierPoint network, the ISP for the content providers listed above. Traffic sent from ICN to TierPoint would have been impacted.

If you are still experiencing problems, please call our NOC at 312.814.3648 Option 2 or DoIT.ICN.NOC@Illinois.Gov.

Network Maintenance – November 11 and 20, 12:01AM – 4:00AM

Comcast will perform network maintenance on November 11 and 20 starting at 12:01AM. Some ICN customers with Comcast last mile circuits will experience an interruption of service during this maintenance. Work will conclude by 4:00AM.

Should you experience any issues following the maintenance, please contact our Network Operations Center (NOC) at 312.814.3648 Option 2 or at DoIT.ICN.NOC@Illinois.gov.

October 25, 2024 - Outage Resolved

Customers with Frontier last mile circuits experienced an interruption of service much of today due to a problem on the Frontier network. That problem has been resolved and all services should be restored.

October 24, 2024 – Outage Resolved

ICN sites connected via AT&T Springfield experienced an outage starting at 2:40 PM. Service was restored by 7:30PM

Scheduled Maintenance – October 15, 2024

Comcast will perform network maintenance on their core equipment serving the Illinois Century Network (ICN) K12 Network on Tuesday October 15 starting at 11:00PM and concluding by 4:00AM the following morning. ICN Customers with Comcast last mile and/or WAN circuits may experience an interruption of service during this maintenance.

Should you experience any issues following the maintenance, please contact our Network Operations Center (NOC) at 312.814.3648 Option 2 or at DoIT.ICN.NOC@Illinois.gov.

October 9, 2024 - Egress Outage

ICN Experienced an outage at one of our egress points starting at 10PM October 9 which was resolved around 1AM October 10. Some ICN customers experienced an interruption of service to the public Internet during this outage.

September 18, 2024 – Outage

A BGP peering session with TierPoint network at Equinix hung up resulting in some critical cloud services being unavailable which included Rival5 for voice services and Skyward. Once the BGP session was reset service was restored. The outage was reported around 8:00 AM and service restored at 9:00AM

Announcement

Sonic Wall Firewall Vulnerability:

‘Critical’ SonicWall Flaw Seeing Exploitation In Ransomware Attacks: Researchers (crn.com)

Scheduled Maintenance – September 22 and 26, 2024

Comcast will perform network maintenance on their core equipment serving the Illinois Century Network (ICN) K12 Network on Sunday September 22 and Thursday September 26 starting at 11:00PM and concluding by 4:00AM each of the two days. ICN Customers with Comcast last mile and/or WAN circuits may experience an interruption of service during this maintenance.

Should you experience any issues following the maintenance, please contact our Network Operations Center (NOC) at 312.814.3648 Option 2 or at DoIT.ICN.NOC@Illinois.gov.

Scheduled Maintenance – September 20, 2024

ICN Engineers will perform network maintenance on core equipment serving the Illinois Century Network (ICN) K12 Network on Friday September 20, starting at 11:00 PM with a maintenance window of 5 hours. The maintenance is not expected to cause any interruption of service. 

Should you experience any issues following the maintenance, please contact our Network Operations Center (NOC) at 312.814.3648 Option 2 or at DoIT.ICN.NOC@Illinois.gov.

Scheduled Maintenance

Comcast will perform network maintenance on their core equipment serving the Illinois Century Network (ICN) K12 Network on Monday August 26 and Tuesday August 27 starting at 12:01AM and concluding by 4:00AM each of the two days. The maintenance is to complete path redundancy into the ICN network. ICN Customers with Comcast last mile and/or WAN circuits may experience an interruption of service during this maintenance.

Should you experience any issues following the maintenance, please contact our Network Operations Center (NOC) at 312.814.3648 Option 2 or at DoIT.ICN.NOC@Illinois.gov.

Scheduled Maintenance

Network maintenance is scheduled for the DoIT E-rate K12 Consortium on Saturday, August 17 beginning at 5AM. Maintenance is expected to last 30 minutes. Report any issues post maintenance to our NOC at 312.814.3648 Option 2 or at doit.icn.noc@illinois.gov.

Scheduled Maintenance

Network maintenance is scheduled for the DoIT E-rate K12 Consortium on Friday, August 2nd, and Friday, August 9th..

Maintenance Details:

• Start Time: 11:00 PM on both dates.
• End Time: 4:00 AM Saturday (August 3rd and 10th).
• Expected Impact: We don't anticipate any service disruptions during this maintenance.

If you experience any issues with your ICN service after the maintenance window, please contact our Network Operations Center (NOC) at 312.814.3648 Option 2 or via email at DoIT.ICN.NOC@Illinois.Gov.

To ensure you receive future network maintenance and outage notifications, please register for our Outages & Maintenance Customer Notification Sign-up page. You'll find this on our Network Status page at: www.illinois.net.

June 27, 2024 NIU/iFiber Outage

ICN customers with NIU/iFiber last mile circuits experienced an outage starting around noon and lasting until approximately 2:40PM experiencing an interruption of service due to a fiber cut. Fiber has been repaired and all sites are showing back up. To report a problem, please call the ICN NOC at 312.814.3648 Option 2.

June 12, 2024 Comcast Outage

June 12, 8:49PM - Comcast last mile circuits are restored. We will work with Comcast for an understanding of the cause of the outage which will be posted here as soon as available. 

Comcast reports repairs are in process. 

Comcast is reporting a fiber cut in the Chicago area. 

June 12, 7:00 PM - Reports of Comcast outage impacting K12 schools with Comcast last mile circuits. Will keep this site updated. 

May 22, 2024 Comcast Outage

May 22, 2024 Comcast collector circuits serving ICN K12 customers went down around 1:45 PM. Service restored by 2:15 PM. Please contact our NOC if you continue to have connectivity problems. 312.814.3648 Option 2.

Announcement

Cisco Identifies Firewall Vulnerability:

https://sec.cloudapps.cisco.com/security/center/resources/asa_ftd_attacks_event_response

April 29 Outage - Comcast Summary of Event

Customer: STATE OF ILLINOIS

Comcast Root Cause Analysis Report

Incident Synopsis: On April 29, 2024, at 09:10 AM, Comcast was investigating the service outage for the STATE OF ILLINOIS, Comcast monitoring system logged the service down at 08:07 AM, on April 29, 2024.

Comcast engineer requested a same day dispatch to troubleshoot a the headend.

09:53 AM: An update was provided and no Estimated Time for Repair (ETR) was given. The Local Contact (LCON) was informed of the dispatch.

10:08 AM: Bridge was set up and in progress, investigation ongoing. Multiple tickets opened for the service issue linked under parent Service Incident (SI) ticket, SI066047234.

11:07 AM: Headend team troubleshooting verified no Receiver signal (Rx) from the location to the headend site.

11:12 AM: Strategic Account Operations Manager (SAOM) reached out to the customer and advised no ETR, investigation ongoing.

11:32 AM: Headend team verified Rx signals received from other nodes.

11:56 AM: Headend teams continued to troubleshoot. An Optical Time Domain Reflectometer (OTDR) test was conducted. OTDR test found optical light signal loss at approximately thirty-two thousand seven hundred feet out in the Comcast outside network plant. Investigation ongoing to pinpoint cause, no ETR.

12:23 PM: Dispatch request updated to add fiber repair.

12:55 PM: Fiber team engaged, enroute to the site for further investigation.

01:46 PM: Fiber team on site, troubleshot further, no ETR. Further investigation located fiber damage at 100 W Randolph St., Chicago, IL. 60601. Construction company performing renovation in the lower level damaged the underground Comcast fiber feed. Assessment and repairs underway, no ETR, updates to follow.

 02:51 PM: Customer called in for update on SI ticket, SI066046919. Comcast advised that ticket was resolved the outage is being worked under parent ticket, SI066047234.

03:05 PM: Headend and fiber teams collaborated to roll fibers, no ETR.

05:05 PM: Fiber teams verified light signal however, the routers remained offline. Troubleshooting ongoing, no ETR.

06:16 PM: Remediation efforts continued, links started to recover.

07:35 PM: Remediation efforts identified fiber optics for reroute, no ETR.

09:21 PM Fiber remediation efforts successful after spare fiber swap.

10:24 PM Headend and fiber teams declared hands off. A Scheduled Maintenance

Root Cause: Construction company performing renovation work at The Thompson Center, 100 W. Randolph St in the lower level damaged the Comcast fiber feed.

Comcast has installed two redundant fiber paths to the Illinois Century Network Chicago POP. Redundant hardware installation pending. Once complete Comcast will have service redundancy eliminating single point of failure caused by a fiber cut.

April 29 Outage (ICN Reporting)

8:35 PM: We confirm that all circuits have restored except for about 6 circuits which Comcast continues to work on. This will be our last update tonight unless there are new developments. Comcast will provide a summary of and cause of the outage and we will share that as soon as it is available. 

7:15 PM: We are seeing most sites restored. Some sites remain down and we continue to work with Comcast for full restoration. 

3:44 PM: Comcast is working to reroute ICN connections to new fiber path. That work has started. Still no ETA.

2:22 PM: Comcast believes they have identified a fiber cut and working to locate where.

12:15 PM: Comcast reporting possible fiber cut. To be verified. All comcast services to ICN Chicago POP facility are down. 

Comcast engineers are troubleshooting their hardware at our ICN Chicago POP facility.

8:30 AM: Comcast is reporting an outage on their network which is impacting multiple K12 Schools in the Chicago area. Engineers are working to resolve the issue. 

PLANNED MAINTENANCE

The Illinois Century Network (ICN) has scheduled network maintenance for February 23, 2024, starting at 11PM and ending by 1AM. Customers connecting to the ICN K12 Broadband Network may experience a brief interruption of service during the maintenance window.

Should you experience any problems with your ICN service after this maintenance, please contact our Network Operations Center (NOC) at 312.814.3648 Option 2 or at doit.icn.noc@illinois.gov.

The Network Operations Center (NOC) is our 24/7 support center. NOC staff monitor the network backbone, customer connections, respond to alarms and customer calls. The NOC is your first point of contact for reporting network problems and initiating technical support for your ICN connection.