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Instructional & Research Information Systems

Wired Networking

Wired network service

Brief Network Disruption.

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All connectivity between EECS and the outside world was briefly disrupted. The exact cause of the outage is unknown; log messages are inconclusive. The primary symptom was dropped OSPF routes on the links which traverse the EECS firewall links. While nobody was actively working on the equipment at that time, it’s possible this outage is related to preliminary testing of new 10GB network links to campus. The problem seems to have resolved itself.

Resolved as of 2009-01-05 16:24:00

EECS Network Maintenance Sunday Dec 28th

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We will be upgrading the network in Soda Hall beginning at 2PM on Sunday, Dec 28th. There will be several network outages as most switches in Soda will be upgraded at this time. While each outage is expected to be brief, there will be several so the network throughout EECS and BWRC may be unstable during this time. This effects both wired and wireless networking. We are allowing a 4 hour window as there are so many switches to upgrade. All work should be complete by 6PM. We regret any inconvenience this may cause.
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Two EECS switches Offline Briefly for Maintenance

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The EECS switches that are serving north east side of Soda 5th floor and of Soda 6th floor will all experience brief outages on Monday, Dec 22, 2008 beginning at 7:00a.m. due to system maintenance.

The wired network will be offline and users will experience a brief (less than 5 minutes) outage while the switch is rebooted to apply new operating system code. Since some wireless networking devices are also fed by those two devices, some of wireless users will experience a brief outage as well.

Resolved as of 2008-12-22 07:30:00

Brief network outage in Cory and BWRC, Oct 28, 6:30am

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The main Cory router will be down for maintenance on Tuesday October 28, 2008 from 6:30AM to 7AM. This will shutdown all connectivity in Cory Hall and internet access for BWRC. Actual downtime is expected to only be about 10 minutes, maybe less.

Bruce, EECS Networks
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BWRC core switch back on service

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Around 1:50pm this afternoon, BWRC core router can not pass the network traffic as the CPU load hit nearly 98%. However, the networks within BWRC remained functional.

SSH attack triggered the spin cycle during that time. This BWRC switch was back on services at 3:00pm.

Resolved as of 2008-07-23 15:00:00

Router Failure

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Just before 4 PM today, a core router management module failed. The unit did try to fail over to the backup but it was not a complete cut over and some services were disrupted. We attempted to reboot the module but that caused a more massive failure in the chassis for less than 1 min. The bad module has been removed and service has been restored. We are continuing to troubleshoot the first problem with the vendor.

Resolved as of 2008-07-22 16:40:00