Two hosts located in different datacenters cannot communicate between each other when VLAN tagging is performed by a Lenovo NIC virtualization.
They are in the same VLAN, but this is transparent to the OS as the VLAN is configured on HW level and not via ifcfg files. This is performed by a third party feature on the hw (Lenovo NIC virtualization) that, when enabled, should handle the VLAN traffic by adding and removing VLAN tags.
Lenovo Flex System x240 M5 blades
kernel version 3.10.0-862.el7.x86_64
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