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Instructional & Research Information Systems

Wired Networking

Wired network service

EECS DHCP Outage, May 19th

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We experienced an issue with our DHCP service this morning, which prevented a number of machines from connecting to the wired network. This issue began around 3AM and was resolved by 10:30AM. If your machine still cannot get online, we suggest rebooting it to try and obtain a new DHCP lease.

We believe that this configuration issue was triggered by yesterday’s datacenter firewall issues. We will be improving our scripts to allow us to better detect and mitigate similar issues in the future.

Please contact us at help@eecs.berkeley.edu if you have any questions, or if you continue to experience network issues.

Cory Hall partial power outage, Wednesday, April 29, 2026

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Campus Facilities Services is scheduled to perform an urgent repair, replacing the main circuit breaker serving Cory Hall’s 188 Lab and 1st floor Mezzanine. An email from Logan Baldini, our Director of Facilities and Capital Projects, already went out on April 8 to Cory Hall occupants.

Work will take place Thursday, April 16 Wednesday, April 29, 8:15pm — 11:15pm. Power will be shut down for most of the south and west side of Cory Hall, including stairwells. Detailed room breakdown is available via Google Doc, attached to the email sent out by Logan.

We do not expect to lose power to our network switches and routers in Cory Hall during this work. If we do have unexpected power loss to our network equipment, then access to services hosted in Cory Hall (e.g. any research or instructional servers in 165 Cory) will be affected; we will monitor our equipment, but would expect service to resume once the electrical work is completed.

UPDATE

[2026-04-14 | larsrohr ]

This work has been postponed by Campus Facilities Services. We will update or re-post when we have an revised schedule to report.

[Read more…] about Cory Hall partial power outage, Wednesday, April 29, 2026

EECS Border Firewall Changes, Mon. March 23

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On Monday, March 23rd, we will be adding some new ports to the list of ports that are blocked by the EECS border firewall.

For detailed information about the changes, please see our EECS Firewall Ports page (this page requires login). The list of ports that we will add to the block list is at the bottom of that page.

Update 3/23 8:05AM: These changes have taken effect, and the new ports are now being blocked from off-campus. Please contact us at help@eecs.berkeley.edu if you have any questions or notice any issues.

Soda 2F Network Interruption, 9/18 10:41 AM

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Networks on the second floor of Soda Hall were unavailable for approximately 5-10 minutes today beginning at 10:41 AM. This occurred due to a switch crash during troubleshooting a memory leak.

The network is now stable, but the memory leak issue still exists and requires further network disruption to resolve. We will be attempting to address this during tonight’s already-scheduled Soda Hall electrical shutdown.

Please contact us at help@eecs.berkeley.edu if you have any questions.

Network Instability, 8/31 9PM – 9/1 2AM

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Portions of the EECS and campus networks experienced instability last night between 9PM and 2AM due to DDoS-like traffic directed at a system on the EECS network. This ended without intervention from network staff; we are investigating and remaining on standby in case this reoccurs.

Please contact us at help@eecs.berkeley.edu if you have any questions or notice any issues.

Jacobs Hall Network Maintenance, Tue. 8/12 10PM – Wed. 8/13 7:30AM

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We will be performing Jacobs Hall network maintenance overnight from Tuesday, August 12th at 10PM to Wednesday, August 13th at 7:30AM. This maintenance is to replace the existing end-of-life router and switches with newer campus standard devices.

All wired and wireless networks in Jacobs Hall will be unavailable between 10PM Tuesday night and 7:30AM Wednesday morning. We expect all networks to be back online by 7:30AM.

Update: This work has been completed. Please contact us at help@eecs.berkeley.edu if you notice any network issues.

POSTPONED: Jacobs Hall Network Maintenance, Tues. Aug. 5 6AM

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At 6AM on Tuesday, August 5th, we will be migrating the first set of Jacobs Hall subnet gateways to new router hardware. This is being done because the current hardware is end-of-life, and also as part of a project to refresh Jacobs Hall networks to the current campus standard.

The following networks will be affected:
– Jacobs Hall general-use wired network (169.229.62.0/24)
– Jacobs Hall wireless networks

During this maintenance, the networks above will be unavailable for a period of time. We expect all work to be complete by 7AM.

Update 8/4: We are postponing this maintenance due to ongoing troubleshooting of a fiber link issue. A new announcement will be made when this work is re-scheduled. Please contact us at help@eecs.berkeley.edu with any questions.