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IRIS

Instructional & Research Information Systems

Wired Networking

Wired network service

Network Interruption Expected, 2/23/18 12-1PM

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We will be performing an experiment which will briefly interrupt the department’s connection to the internet. We understand this is disruptive but the experiment is necessary to determine the cause of the last week’s outages and ensure they do not recur unexpectedly.

Our window for performing the test is 12-1PM, however the actual test will last for 10 minutes or less and the interruption should be brief.
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Intermittent Network Outage Redux, 2/21/18

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We are experiencing a repeat of last week’s network border issues. We are working with local system administrators to fully remove all problematic devices from the network.

The network will remain mostly stable during this time but there will be a few brief outages as we attempt to verify whether all interferers have been removed.
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EECS Network Border Malfunctioning, 2/15/18

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We are currently experiencing an issue at the EECS network border which is causing intermittent outages. The connection affected is between EECS and the outside world.

This means that communication within the EECS network should be unaffected, and connectivity to campus or the Internet is intermittently unavailable.

Impact to the research computing cluster in Soda Hall is currently undetermined.

Network staff are coming onsite to better diagnose the issue, and an update will be posted here when we have more detail or an ETA.

Update 11:54 AM:

We are troubleshooting an issue where OSPF control traffic is intermittently dropped between our core and edge router, causing all data traffic to stop.

Traffic is affected between:
* EECS network and campus/Internet
* EECS network and Soda research compute network

Traffic is not affected:
* within the EECS network
* between Soda research compute and campus/Internet (except during certain troubleshooting procedures)
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Soda Hall Power Shutdown, Wed. 11/29 2AM

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There will be a power shutdown for Soda Hall on the early morning of Wednesday, November 29th, scheduled for 2 to 6 AM. The shutdown and short notice are due to an urgent need for the campus high voltage team to complete repairs from line damage in June. It is also possible that the outage could be extended if difficult circumstances are encountered.

We have arranged with campus facilities to receive generator power for 288 and 290 Soda so that we can continue to provide IT services to the outside world while Soda is dark. As such, no interruptions to IRIS services outside Soda Hall are expected at this time. However, due to many electrical load variables it is possible that we may need to shut down some services without notice during the maintenance window.

Power to research server rooms 420A and 287 will be lost and the sysadmins of those rooms are coordinating a full system shutdown.

For sysadmins of machines in 340 Soda, you will also need to shut down your machines. We recommend doing so before midnight.
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Soda 5F South Network Issue

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We are currently experiencing brief, intermittent losses of connectivity to Soda’s 5B network closet which serves the south side of the fifth floor.

The outages last approximately one minute and are spaced several hours apart. They appeared to be due to a fault in the 5B switch’s primary uplink to the BDF, so the primary link has been temporarily disabled in favor of the backup link.

As the issue is not currently severe we plan to investigate further on Monday. If things escalate, we will intervene sooner.
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