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Extreme / Avaya / Nortel => Extreme / Avaya / Nortel Ethernet Switching => Topic started by: Michael McNamara on March 11, 2012, 06:27:42 PM

Title: Daylight Saving Time
Post by: Michael McNamara on March 11, 2012, 06:27:42 PM
I've received a few inquires over the past few days from folks asking about Daylight Saving Time (DST) and how to configure it on the Avaya Ethernet Routing Switches.

I would recommend you start with this blog post as a primer;
http://blog.michaelfmcnamara.com/2008/06/network-time-protocol-ntp/

That's a fairly old post and it requires that you re-configure the summer-time setting every year (in every switch) with the stackable switches. Thankfully I'm very adept at utilizing Expect (http://"http://blog.michaelfmcnamara.com/2008/07/expect-script-daylight-saving-time/) to make configuration changes across a large number of switches. However, with the release of 6.2.x software there's a new configuration option that allows you specify the time format similar to the Ethernet Routing Switch 1600, 8600 and 8800 switches so they don't need to be re-configured every year.


clock time-zone EST -5
clock summer-time recurring 2 Sunday March 02:00 1 Sunday November 02:00 60


The commands above are for enabling Eastern Daylight Time (EDT) since I'm on the east coast of the US.

The clock summer-time command replaces the original below;


clock summer-time EDT date 11 Mar 2012 2:00 4 Nov 2012 2:00 +60


Every year you would need to reconfigure the switch the exact date that Daylight Saving Time would be enacted. The new command works similar to the ERS 8600/8800 by calculating the second Sunday or March and the first Sunday of November.

Cheers!