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IRIS

Instructional & Research Information Systems

Network Maintenance for EECS network May 27th

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We will sync network firmware and also upgrade the BootROM for one router in Soda 2nd floor (soda-server8810)on next Wed May 27,2009. We expect that there might be brief network outages between 6:00AM to 7:45AM.

This router serves several department servers and this will affect users who use network at that time. We regret any inconvenience this may cause. Please make your plans accordingly.
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Department website, mailing lists, jabber offline

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The department’s web server (www.eecs & www.cs), mailing list server (lists.eecs), and jabber server (jabber.eecs) all run on a Xen virtual cluster. After last night’s network failure was resolved around 2:30am, the Xen cluster failed to recover gracefully. These services had to be manually restarted this morning. Web and mailing list services were restored around 9:20am, and jabber was restored around 9:45am.

Staff are investigating why this occurred and how to prevent it from happening again.

Resolved as of 2009-05-22 09:30:00

Sutardja Dai Hall switch updates

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We’ve experienced unexpected blade reboots and multicast errors on some of the new switches in Sutardja Dai Hall. Per the vendor’s suggestion, I’ll be upgrading these to a newer software release.

Subnets Affected:
128.32.156.0/24, 128.32.247.0/25, 169.229.14.0/24, 169.229.222.0/23

The code revisions are close, so we expect to be able to perform a hitless upgrade; there should be no perceivable disruption. Nevertheless, I’m scheduling a 45 minute maintenance window (1715-1800) in case of problems.
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network maintenance for BWRC network

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We will upgrade the new image code for two BWRC switches on this Thursday May 14,2009. There will be brief network outages from 7:00AM to 7:10AM.

This will affect users who use wired connection in the BWRC lab and some machines that are connected to summit226-1 switch. Wireless in BWRC will not be affected. This upgrade should take less than 2 mins.

We regret any inconvenience this may cause. Please make your plans accordingly.

Resolved as of 2009-05-14 07:03:00

Planned Sutardja Dai Hall electrical shutdown

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There will be a temporary shutdown of power on Sat May 2, from 8am to noon to verify Building Automation Function with loss of power.

All network equipment, including wireless, should run on UPS and then emergency power once the main generator kicks in. While we expect no problems, this is the first operational test of the network UPSs.

(Note: All switches successfully remained online over the weekend. May 4, 0900.)

Resolved as of 2009-05-02 12:00:00