I have inherited an ESX 3.5 env. with which is a 3 cluster node with a physical vCenter that has only HA configured.
The 3 ESX nodes are ALL on the 10.10.X.X network and the vCenter server is sitting on the 172.X network but it has a second NIC with an IP that belongs to the 10.10.X network where the ESX's server belong to.
I the 10.10.X network can be accessed from the 172.X network. So vCenter is able to talk to the ESX server without the need of having a second NIC (10.10.X.X)
As far as a know there are no settings from VMWare the require vCenter to have a second NIC configured in order to work.
However the only reason I could think for this setup is just to separate the traffic between networks/Vlans so for example the 172.X network (VLAN172) is assigned for regular server traffic and 10.10.X.X (VLAN10) is just being used for the ESX nodes and the second NIC on vCenter.
I understand that with this setup we will be able to divide the traffic between VLANS to improve the performance and secure traffic.
Does that make sense?
Is there any other reasons why ou would go with a setup like the one described above?
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