S2D Cluster Validation Fails Firewall and UDP Port 3343

Hello Everyone,

I'm trying to setup Storage Spaces Direct on Server 2016 Datacenter in a test environment, however my 2 node setup keeps failing cluster validation (powershell test-cluster).

The failure messages are;

Network Communication Errors-

Network interfaces VMHOST1.test.com - Mellanox 2 and VMHOST2.test.com - Mellanox 1 are on the same cluster network, yet address 10.10.101.11 is not reachable from 10.10.101.12 using UDP on port 3343

Network interfaces VMHOST1.test.com - Mellanox 1 and VMHOST2.test.com - Mellanox 2 are on the same cluster network, yet address 10.10.101.13 is not reachable from 10.10.101.10 using UDP on port 3343.

Network interfaces VMHOST2.test.com - Mellanox 1 and VMHOST1.test.com - Mellanox 2 are on the same cluster network, yet address 10.10.101.12 is not reachable from 10.10.101.11 using UDP on port 3343.

Network interfaces VMHOST2.test.com - Mellanox 2 and VMHOST1.test.com - Mellanox 1 are on the same cluster network, yet address 10.10.101.10 is not reachable from 10.10.101.13 using UDP on port 3343.

Firewall Errors-

The Windows Firewall on node VMHOST1.test.com is not properly configured for failover clustering. In particular, the 'Public' firewall profile is enabled on adapter 'VMHOST1.test.com - Mellanox 2'.  The 'Failover Clusters' rule group is not enabled in firewall profile 'Public'. This may prevent some network communication between cluster nodes.

The Windows Firewall on node VMHOST1.test.com is not properly configured for failover clustering. In particular, the 'Domain' firewall profile is enabled on adapter 'VMHOST1.test.com - Host Management'.  The 'Failover Clusters' rule group is not enabled in firewall profile 'Domain'. This may prevent some network communication between cluster nodes.

I have;

Disabled all firewall profiles in Control Panel

Unblocked UDP communication on both nodes by running netsh commands;

netsh advfirewall firewall show rule "Failover Clusters (UDP-In)"

netsh advfirewall firewall set rule "Failover Clusters (UDP-In)" new enable=no

netsh advfirewall firewall show rule "Failover Clusters (UDP-In)"

Still getting errors

My setup is as follows;

2)HPE ProLiant DL380 Gen9 servers, connected directly together using twinax DAC. The cables run from the dual port, 100gb,  Mellanox ConnectX-5 in node 1 to the Mellanox ConnectX-5 in node 2. This is my failover network, no switch in between.

Any help would be greatly appreciated

DJ