Wired Networking

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

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

We experienced yet another border outage this morning between 11:13 and 11:57. It has stabilized but we will keep this news item open while we continue to investigate, as additional lesser outages are still possible.
[Read more…] about EECS Network Border Outage 3/8/18

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, 2/23/18 12-1PM

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

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

Staff are investigating a sudden loss of network in Cory Hall. All of Cory Hall, including the 165 machine room, is offline at this time.
[Read more…] about Cory Hall network outage

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.
[Read more…] about Soda Hall Power Shutdown, Wed. 11/29 2AM

We experienced a UPS failure in 158 SDH just after midnight last night, which caused an outage for the following networks:

* Sutardja Dai Hall wired and wireless
* Blum Hall wireless
* Calvin Lab wireless


Network service was restored before 11AM. Please email help@eecs if you are still having trouble.

Resolved as of 2017-10-15 10:49:00