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A vSphere administrator uses vMotion to migrate a virtual machine between two ESXi hosts and notices that they can no longer ping the VM. What is the cause?
A.
The destination host has an incorrect VLAN tag on the virtual machine port group for the VM.
B.
The destination host has two port groups with the same VLAN tag.
Answer would be A. Multiple portgroups with the same VLAN ID wouldn't impact the traffic, unless there are overlapping IPs used, which would be a problem for the OS to begin with. So the answer is A, as when you move the VM the IP wouldn't belong to the subnet/VLAN it belongs to.
A is correct. As Tony mentioned. If the situation B happends connection should work continuously. As for the connection vlan Tag/ID is important. vlan Name shouldn't have any impact.
Correct Answer is A. B is wrong and here's why:
- When you migrate a Virtual machine you have the option to select VLAN from available Networks. Migration will complete is you chose a different vlan (mostly used when you are migrating between clusters and datacenters) but the VM will not be able to communicate until you re-ip to the a valid IP address for the destination VLAN.
- B is wrong. You can configure multiple portgroups with the same VLAN ID (I have applications that require 4 NICs for same appliance on same VLAN and that's the only way you can accomplish that), but, as Tony stated, it does not impact the traffic
A is correct, 2 port groups using the same VLAN ID would only allow devices on either to tag traffic to that VLAN, would not block or otherwise impact anything else.
Highly agree with Tony. This is a common mistake during initial build.
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