IRIS

Instructional & Research Information Systems

EECS

Wireless Networking

Wireless network service

Brief Wi-Fi Outage, 9/14/18

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There was a brief wireless network outage this morning due to a simultaneous crash of the primary and backup wireless controllers. The controllers self-recovered and we are now investigating the cause of the crash.

Wireless networks at BWRC were not affected.

Resolved as of 2018-09-14 10:20:00

BWRC Uplink Issues, 8/23/18

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Following this morning’s IST network maintenance we are experiencing issues passing traffic in and out of BWRC. We may have identified the root cause and are working with the campus NOC to resolve.

The impact specifically seems to be traffic between BWRC and EECS. Local traffic within BWRC is not affected. General traffic to/from the Internet does not appear affected. We are unsure about traffic between BWRC and the rest of campus outside EECS.

We will be performing an experimental configuration change tomorrow morning on the related EECS routers to try and alleviate the issue until the true cause can be addressed with IST. An update will be posted here before or around noon.
[Read more…] about BWRC Uplink Issues, 8/23/18

Network slowness, dropped packets

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Staff are investigating widespread reports of network slowness and dropped packets.

Network traffic solely within EECS networks appears to be fine, but network traffic traveling past the EECS border to campus or beyond is incurring significant packet loss. It is unclear at this time whether the problem exists on the EECS side or the campus side.

We will update this news item with more information as it becomes available.
[Read more…] about Network slowness, dropped packets

Network Outage, 3/16/18

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The EECS network’s connection to campus and the Internet was offline for about 30 minutes due to a firewall protocol failure during a configuration change that should not have been disruptive. The error was corrected and the network is restored.

Resolved as of 2018-03-16 16:25:00

Network Interruption Expected, 2/23/19 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.
[Read more…] about Network Interruption Expected, 2/23/19 12-1PM

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.
[Read more…] about Intermittent Network Outage Redux, 2/21/18

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)
[Read more…] about EECS Network Border Malfunctioning, 2/15/18