An administrator has enabled vSphere Distributed Switch Health Check. The hosts connected to that
Distributed Switch all display an alert:
vSphere Distributed Switch MTU supported status
The administrator has all of the VMkernel ports MTU sizes set to 1600.
Which action will remedy this problem?
A.
Configure the Distributed Switch to MTU 9100.
B.
Disconnect and reconnect the physical network cable.
C.
Configure the physical switch to MTU 1600.
D.
Disable the Distributed Switch MTU.
C,
https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.networking.doc/GUID-53F968D9-2F91-41DA-B7B2-48394D997F2A.html
You can increase the MTU size up to 9000 bytes. Therefore, a MTU of 9100 is not supported. The MTU configured in the VDS must match the physical switch configured MTU.
The other 2 makes no sense IMO.
and you are right. 1600.
C
C
I would go with C as well.
The only point to consider is that by changing the MTU size on the physical switch would potentially cause Health check alarms for any other port groups on this distributed switch. Since none of this is mentioned in the question and all other options are completely wrong, C is the one to go with.
If you set MTU to 9000+ and the physical switches dont support/have enabled jumbo frames then you will have issues.
C for me.
The Maxium MTU supported is 9000.
https://kb.vmware.com/s/article/1038827
The correct answer is C