The Network Connectivity Validation step fails during VMware Cloud Foundation 3.0 bring-up

Products

• VMware Cloud Foundation

Issue/Introduction

Symptoms:

• The Network Connectivity Validation step fails during VMware Cloud Foundation 3.0 bring-up
• A network switch using a Linux operating system is in use in the VMware Cloud Foundation environment
• You see an error similar to the following in the Cloud Builder UI:

Network Connectivity Valdiation, error: '"- ESXi host '172.16.11.101' -> '172.16.11.103' VLAN 'VSAN' doesn't support MTU 9000 but smaller 1500 MTU packet SUCCESS"

Environment

VMware Cloud Foundation 3.0.x

Cause

When conducting a ping test with an MTU size of 9000 bytes the Linux ICMP/ping implementation doesn’t encapsulate the 28 byte ICMP (8) + IP (20) (ping + standard internet protocol packet) header – as a result the size of the packet would be 9028 when attempting to do a ping test and would result in failure.

Resolution

This is a known issue affecting VMware Cloud Foundation 3.0 when a network switch using a Linux operating system is in use. There is currently no resolution.

Workaround:
To workaround this issue, click the Acknowledge button to move past the error and proceed with bring-up.

Additional Information

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