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Traffic flow when cold migrating a vm

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Hello

 

Is this statement correct: "When I am cold migrating a (powered off) vm from one ESXi's local storage to another ESXi's local storage via vCenter, the traffic flow goes through the management-traffic-portgroup, not the vmotion-portgroup?"

 

It's because when I do a hot migrate, regardless of its a vmotion or a vmotion with storage vmotion, then the traffic flow goes through the vmotion port group. It's the behavior that I expect. But why does the traffic not flow through the vmotion-portgroup as well when I do a cold migration? Or ist there a misconfiguration? But I have different port groups on different nic's and there are different subnets configured...and every port group has just one traffic type assigned.

 

I am just studying: What if I have a 10GB vmotion network and a 1 GB management network? When doing a cold migration, the traffic will choose the slow 1-GB-connection? Everybody is giving as much bandwidth as possible for vmotion, but in that scenario the traffic goes through the management network? I know - in most cases we are doing a vmotion or svmotion. But I was astonished when I detected, that the traffic choses the management port group and not the vmotion port group...

 

Is this really the default behavior as described?

 

 

Best regards

Roland


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