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Assessment Title
Rule Text
External physical switch ports configured for EST mode are configured with spanning-tree enabled.
Description
Discussion Text
EST mode has a one-to-one relationship, the number of VLANs supported on the ESX Server system is limited to the number of physical network adapter ports assigned to the VMkernel. EST is enabled when the port group’s VLAN ID is set to 0 or left blank. Due to the integration of the ESX Server into the physical network, the physical network adapters will need to have spanning-tree disabled or portfast configured for external switches, since VMware virtual switches do not support STP. If these are not set, potential performance and connectivity issues could arise. Virtual switch uplinks do not create loops within the physical switch network.
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