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Instructional & Research Information Systems

IRIS Staff

IMAP Service down briefly

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Starting at around 1AM, staff began to receive reports of problems with expunging or deleting messages from inboxes on imap.eecs. This problem seems to have affected all users regardless of the choice of e-mail client, including the web client.

At approximately 2AM, the problem appeared to have degraded to the point that e-mail clients were no longer able to successfully connect to imap.eecs.

At approximately 2:20AM, service was restored.

It is not clear at this time what the cause of the outage was or whether service was restored by staff intervention or by automatic system reboot after a crash.

If you continue to have problems accessing your mail via imap.eecs, please contact the [IRIS Helpdesk](https://iris.eecs.berkeley.edu/help)

Resolved as of 2010-06-14 02:20:00

Network core maintenance

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I will be replacing two 10Gbit line cards in the Soda Hall core router. I will replace one card today, and one tomorrow.

We’ve already replaced similar line cards in the EECS border and Cory Hall routers without incident. The Soda router reconfiguration is slightly more complex, but due to redundant connections and routing, no discernible connectivity disruption is expected.

The vendor confirmed that the current line cards contain faulty hardware and provided replacements. The IRIS network suffered several outages due to this bug, which typically only appears after 6-9 months of operation.

Resolved as of 2010-06-04 11:30:00

6th floor Soda switch replacment

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Due to a power supply failure, I will be replacing one of the stacked switches which serves the 6th Floor of Soda Hall. The switch is currently operating only on an external redundant power supply.

The outage will definitely affect half of the connections on the 6th floor for about 20 minutes; if a full stack reboot is required (likely) the rest of the 6th floor connections, including wireless, will be briefly disrupted.

Resolved as of 2010-04-29 07:40:00