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Intermittent Network Outages 5/4/15

May 4, 2015 by Derek Calderon

An attempt at adding a new switched link in the network core resulted in a broadcast storm which crippled the EECS network between approximately 5 and 6 PM this evening. The maintenance was rolled back and the network was allowed to stabilize. We will reattempt this maintenance in the future after we have analyzed the data gathered to determine what went wrong.

UPDATE

[2015-05-04 22:37:51 | Derek Calderon]

Despite earlier indications to the contrary, we are still experiencing a partial network outage in Cory Hall, including large portions of the wireless network. Further diagnosis is impossible until network staff arrive onsite in the morning.


UPDATE

[2015-05-05 07:53:09 | Derek Calderon]

Full service was restored to Cory Hall at 7:46 this morning. It seems that after yesterday’s maintenance the forwarding tables on Cory’s main router were left in a bad state which prevented certain hosts from being reachable and from which the router was unable to self-recover. The router was rebooted and service appears to be restored.

If you continue to experience any issues, please email help@eecs.berkeley.edu. We apologize for this outage and for not being able to resolve it sooner.

Resolved as of 2015-05-05 07:46:00

Filed Under: Resolved Incidents Services: Wired Networking, Wireless Networking

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Outages to campus services are listed at berkeley.statusdashboard.com.
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