we have several ibm bladecenters H with a few hundred hosts across the blades. i know that on stand alone servers, VMs on the same vswitch don't have to send network traffic out to a physical switch to pass data back and forth, it goes through the vswitch to the other VM, but how does data move from one VM on one blade to another VM on a different blade BUT within the same bladecenter H? does the data have to go out to an external physical switch or does is stay within the bladecenter?
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