In our previous discussion on virtual networking, we explained how virtual networks are replacing the need for virtual local area network (VLAN) configuration in data centers, and simplifying the grouping and isolation of servers. But we never really explained how the virtual networks are actually accessed, since they “ride” underneath physical networks. So, let’s take…

For a long time data center architects have struggled with the requirement to provide connectivity across racks of servers, across multiple locations, while maintaining isolation for groups of those servers.  For example, the Accounting department might not want their servers accessible to someone working on another department’s server.  The Accounting servers need to be isolated,…

Cisco’s Identity Services Engine was first released in May of 2011 as version 1.0 and they recently released version 1.3. That doesn’t sound like much of a change, does it? But regardless of version numbers, the product has continued to evolve since its initial release to accommodate the changing network-wired, wireless and remote access VPN…

I’ve seen plenty of change throughout my career.  The first big wave was IP telephony, then a large security wave, next up was wireless and then security again. Now, we are on to the data center.  I have learned that the more we change the better we become, and the more our users rely upon…