Virtual machines on the same distributed port group but different hosts cannot communicate with each other

In some cases , Virtual machines on the same distributed port group but on different hosts cannot communicate with each other .

problem
Virtual machines on different hosts but on the same port group cannot communicate . From one virtual machine to another Ping The operation has no effect . Use vMotion Cannot migrate virtual machines between hosts .

reason
In the binding and failover commands of the distributed port group , Some hosts assigned to active uplink or standby uplink do not have physical network cards .
The physical network cards on the host assigned to the active uplink or the standby uplink are located in different locations on the physical switch VLAN in . Different VLAN The physical network card in cannot see each other , So we can't communicate with each other .
Solution
stay Distributed Switch In the topology of , Check which host is not assigned to the physical network card of the active uplink or standby uplink on the distributed port group . Assign at least one physical network card on the host to the active uplink on the port group .
stay Distributed Switch In the topology of , Check the assigned to the physical network card of the active uplink on the distributed port group VLAN ID. On all hosts , Will be the same VLAN The physical network card in is assigned to the active uplink on the distributed port group .
To verify if there is a problem with the physical layer , Please migrate the virtual machine to the same host , And check the communication between the virtual machines . Verify that inbound and outbound... Are enabled in the client operating system ICMP Traffic . By default , stay Windows Server 2008 and Windows Server 2012 disable ICMP Traffic .

This is the official advice

The actual situation will vFW Migrate back and forth on different hosts

All of a sudden, all three hosts will work together Then everything will be normal

Feeling vsphere There is a problem with the settings there But I don't know how to do it. Now everything is normal