Deployment Guide

47 Dell EMC Solutions for Microsoft Azure Stack HCI Networking Guide

9.13 Configure DCB on Ready Nodes

This section is only necessary if DCB is used. See Chapter 4 for more information on DCB options.

Run the following commands on each of the Ready Nodes in the cluster to configure DCB:

1. Create a new QoS policy with a match condition set to 445. The TCP port dedicated for Server

Message Block (SMB) traffic is used to set the priority value to 3.

PS> New-NetQosPolicy -Name 'SMB' –NetDirectPortMatchCondition 445 –

PriorityValue8021Action 3

2. Create a new QoS policy for cluster heartbeat messages and set the priority value to 5.

PS> New-NetQosPolicy -Name 'Cluster' -Cluster -PriorityValue8021Action 5

3. Enable QoS for the network adapter ports.

PS> Enable-NetAdapterQos –InterfaceAlias 'SLOT 2 PORT 1','SLOT 2 PORT 2'

Note: The InterfaceAlias values above are determined using the Get-NetAdapter PowerShell

command.

4. Enable PFC on priority 3 and 5 traffic.

PS> Enable-NetQosFlowControl -priority 3

PS> Enable-NetQosFlowControl -priority 5

5. Enable Windows ETS allocation for Priority 3 and 5.

PS> New-NetQosTrafficClass -Name 'SMB' –Priority 3 –BandwidthPercentage 50

–Algorithm ETS

PS> New-NetQosTrafficClass -Name 'Cluster' –Priority 5 –

BandwidthPercentage 1 –Algorithm ETS

Note: The bandwidth percentages set above must match that set on the leaf switches in Table 11.

6. Disable DCBx willing mode.

PS> Set-NetQosDcbxSetting -Willing $False

7. Set DCBx mode to “Host in charge” on Mellanox adapters.

Note: The following command is applicable to the Mellanox Connect-X4 Lx adapters only. This command

also disables LLDP on the adapter.

PS> Set-NetAdapterAdvancedProperty -Name 'SLOT 2 PORT 1' -DisplayName

'Dcbxmode' -DisplayValue 'Host in charge'

PS> Set-NetAdapterAdvancedProperty -Name 'SLOT 2 PORT 2' -DisplayName

'Dcbxmode' -DisplayValue 'Host in charge'

DCB configuration on the server is verified with the Get- cmdlets shown in Section 10.11.