IRIS

Instructional & Research Information Systems

EECS

Wireless Networking

Wireless network service

Wireless Network Frequency Issues, 10/20/17

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All wi-fi networks except those at BWRC are currently impaired due to a wireless controller issue. The repair would be more disruptive than the issue so we will not take action until tonight.

The problem is that the vast majority of our 5GHz wireless radios are currently using the same wi-fi channel, causing a large amount of co-channel interference which is greatly degrading wireless performance.

Last night we made changes to the configured bandwidth of the 5GHz channels in an attempt to increase general reliability. Unfortunately we did not notice until well after the fact that the wireless controller’s dynamic channel assignment (DCA) algorithm was malfunctioning; this resulted in all or most radios defaulting to channel 36 and being unable to change.

Correction of the issue will require a full outage of the wireless network, which is why with user feedback we have decided to wait until after the business day to make any changes.
[Read more…] about Wireless Network Frequency Issues, 10/20/17

SDH, Blum, Calvin Network Outage 10/15/17

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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

EECS-Secure Authentication Unavailable 10/11/17

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The authentication service for EECS-Secure was unavailable from 00:17 to 13:35 today. This was caused by a bad update that was automatically pushed to our servers by the vendor. We did not notice the issue or receive any trouble reports, so it went undetected until an alert was received from the vendor at 13:25.

The alert included a fix which we applied and service was restored by 13:35. During the outage, machines were unable to connect to EECS-Secure.

Information from the vendor about the bad update was posted at the following URL: http://community.arubanetworks.com/t5/Security/ClearPass-Policy-Server-is-down-after-the-recent-AV-AS-update/td-p/309698

Please contact help@eecs.berkeley.edu if you are still experiencing network problems.

Resolved as of 2017-10-11 13:35:00

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.
[Read more…] about Soda 5F South Network Issue

BWRC Router Upgrade, 9/12/17

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We will be upgrading the BWRC router at 8AM on Tuesday 9/12/17. An outage of approximately 10 minutes is expected.

The upgrade is intended to bring the router up to a vendor-supported software level, as well as to enable some new features.

Please contact help@eecs.berkeley.edu if you have any questions or concerns.
[Read more…] about BWRC Router Upgrade, 9/12/17

Soda 6th Floor Wi-Fi Outage, 8/30/17

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There was a wi-fi outage on the 6th floor of Soda Hall yesterday afternoon due to a switch PoE failure. An alternate power source was installed and service was restored.

We will need to perform additional troubleshooting and maintenance in the future in order to diagnose and restore the original power source.

Resolved as of 2017-08-30 16:00:00

Soda Hall Power Shutdown, Tues. 8/29/17

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There will be a power shutdown for Soda Hall on Tuesday August 29th, scheduled for 3 to 7 AM. The shutdown and short notice are due to an urgent need for the campus high voltage team to repair equipment which was damaged 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, or 2AM if you feel like cutting it close.
[Read more…] about Soda Hall Power Shutdown, Tues. 8/29/17