https://a996c8ee.aww-3cz.pages.dev/tags/datacenter/ Recent content in Datacenter on Aaron's Worthless Words Hugo en Mon, 25 Jan 2010 00:00:00 +0000 https://a996c8ee.aww-3cz.pages.dev/posts/2010/01/migrating-csm-serverfarms-to-other-server-vlans/ Mon, 25 Jan 2010 00:00:00 +0000 https://a996c8ee.aww-3cz.pages.dev/posts/2010/01/migrating-csm-serverfarms-to-other-server-vlans/ <p>A coworker brought an interesting problem to me the other day.  He wanted to move a serverfarm from one server VLAN to another without taking an outage.  Since I didn&rsquo;t want to have to come into the office late at night to do work, I decided to see what we could do.</p> <p>It turned out to be pretty easy.  We tend to think of CSM VLANs as pairs &ndash; you have the client VLAN for the web servers where the vserver sits and the server VLAN where the serverfarm sits.  The CSM doesn&rsquo;t know about these relationships; all it cares about is whether the servers are in a server VLAN, and we can use that to our advantage here.</p> https://a996c8ee.aww-3cz.pages.dev/posts/2009/03/an-interesting-problem-with-multiple-dcs-on-a-stick/ Tue, 24 Mar 2009 00:00:00 +0000 https://a996c8ee.aww-3cz.pages.dev/posts/2009/03/an-interesting-problem-with-multiple-dcs-on-a-stick/ <p>We talked about <a href="http://aconaway.com/2008/08/12/running-multiple-data-centers-on-a-stick-with-the-csm/" title="AConaway.com -- Running Multiple Data Centers on a Stick">running multiple data centers on a stick</a> back in August, which is where you have multiple logical pairs of client and server VLANs on a single CSM for different tiers or functions.  The big point of the article was that you had to do some fancy forwarding to get a server-initiated connection from one server VLAN to appear out the appropriate client VLAN.  Well, we ran into an interesting issue with the given solution.</p>