Are you in the process of setting up VMware IPFIX support? Keep this post in mind as when you have an IP address assigned to a Virtual Distributed Switch (VDS) reporting to a NetFlow or IPFIX Collector, all of the VMs (ESX hosts) show up as unique instance numbers but, all from the same IP address. Imagine having 100 VMs all showing up as the same IP address in your flow collector. Confusion can ensue.
Note: you might want to read Part 1 of this post: VDS NetFlow Support.
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