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Virtualization: How sysadmins whacked the Network Admins by surprise

Versatilism is forcing its way into your organizations, like it or not!

Even more direct of a comparison though is the tried and true VLAN. You have a hub/switch, but you need to have multiple subnets running on it. In the old days, this meant buying more devices (in those days probably hubs) and winding up with an unmanageable sprawl of network devices. You can consolidate all of those network devices into a smaller subset, but still keep the isolation of network segments by simply creating a VLAN for each network segment. One switch (or at least a subset of the original switches) while still having the same number of subnets. This sounds strikingly similar to how you can consolidate all those physical servers down virtual machines running on a handful of physical servers.

So there you have it. Virtualization is nothing more than VLANs and HSRP/VRRP/GLBP, plucked right from us network admins and applied to servers. You've gotta watch those server folks...

This NetIQ guy talks about it here.


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