Author Archives: kwoo

Wireless Service Interrupted to POD, LIB and JOR Buildings – 09:22 am, Oct. 16, 2012

Posted on October 16, 2012 by kwoo

At 9:22 am, Oct. 16 Network Engineering staff were alerted by our monitoring systems that the wireless service for the POD, LIB and JOR Buildings were not working properly.  A software module locked-up in one of the wireless controllers. The controller … Continue reading →

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Interruption to Wireless Access – 12:30 pm 20-August-20

Posted on August 20, 2012 by kwoo

Wireless access was interrupted for all locations except TRSM. One of the wireless controllers had to be rebooted to clear the issue. Service was restored @ 13:20 20-August-20 . We apologize for the interruption. Computing and Communications Services

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Intermittent Connectivity to Wireless Users Across Campus – July 26, 2012 – 13:45 PM

Posted on July 26, 2012 by kwoo

A defective blade in a WDS (Wireless Distribution Switch) was noticed at approximately 13:45 today. This caused intermittent connectivity to wireless users across campus. The blade was replaced at approximately 14:00 and connectivity is now stable. We apologize for the … Continue reading →

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General Network Slow Response – July 10, 2012 08:15 AM

Posted on July 10, 2012 by kwoo

At approximately 8:15 am today, CCS started receiving reports of a general slow response when accessing core Ryerson applications as well as the Internet. Preliminary investigation indicates the problem to be with the network core firewall cluster.  CCS IT Security staff are investigating … Continue reading →

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UPDATE: Service Affected for Wireless Access Points in the West/South corner of the Campus – 14:00 June15, 2012

Posted on June 15, 2012 by kwoo

UPDATE: The issue with RU-Secure has been identified by the vendor. It is a combination of exceeding the allowed number of VLANs per SSID and a bug in the current code that disables some SSIDs due to a buffer overflow. … Continue reading →

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415 Yonge St – Network Outage – 2012.06.03 06:45

Posted on June 4, 2012 by kwoo

One of the network distribution switches serving the west side of the campus was rebooted at 6:45 AM to clear up a wireless connectivity issue. Traffic was re-routed to another distribution switch during the 3 minutes of reboot. Because 415 … Continue reading →

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High Firewall CPU Utilization Affecting OGF and SAS Services – 8:30 am, May 08, 2012

Posted on May 9, 2012 by kwoo

The data centre firewall in front of SAS, OGF and HR systems is currently experiencing high CPU utilization, over 90%. This may be increasing the response times for users trying to access these systems. The problem has been identified. There … Continue reading →

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TRS-YDI Wireless Controller Fail-Over – 2012-April-20 9:30am

Posted on April 20, 2012 by kwoo

Due to a problem with the WiFi network in TRS and YDI some people may find the WiFi network has stopped working and have to login again. We are investigating the problem. However, it appears the network interface to the … Continue reading →

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Some Users Could Not Reach Services at www.library.ryerson.ca and ezproxy.lib.ryerson.ca – 16:30, Wed., April 11, 2012

Posted on April 11, 2012 by kwoo

At approximately 16:30 today the domain names www.library.ryerson.ca and ezproxy.lib.ryerson.ca became unresolvable. External and internal users were having different problems. The records for www.library.ryerson.ca were missing from the database, at this time we are unable to find a cause for … Continue reading →

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Service Interruption Due to Data Centre Firewall Problem – 7:15 am,Tuesday, March 13, 2012 – UPDATE

Posted on March 13, 2012 by kwoo

UPDATE: 10:20 am, Tuesday, March 13, 2012 The problem has been isolated to a departmental server.  The server was sending large amounts of data, causing the firewall to go to high levels of utilization.   The server has since been … Continue reading →

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