Hardware Installation and Maintenance Guide, Version 11.70.1 - Configure storage array NVMe over RoCE connections

If your controller includes a connection for NVMe over RoCE (RDMA over Converged Ethernet), you can configure the NVMe port settings from the Hardware page or the System page in ThinkSystem System Manager

Your controller must include an NVMe over RoCE host port; otherwise, the NVMe over RoCE settings are not available in ThinkSystem System Manager.
You must know the IP address of the host connection.

You can access the NVMe over RoCE configuration from the Hardware page or from Settings > System. This task describes how to configure the ports from the Hardware page.

Note: The NVMe over RoCE settings and functions appear only if your storage array's controller includes an NVMe over RoCE port.

Select Hardware.
Click the controller with the NVMe over RoCE port you want to configure.
The controller's context menu appears.
Select Configure NVMe over RoCE ports.
The Configure NVMe over RoCE ports dialog box opens.
In the drop-down list, select the port you want to configure, and then click Next.

Select the port configuration settings you want to use, and then click Next.

To see all port settings, click the Show more port settings link on the right of the dialog box.

Port Setting	Description
Configured ethernet port speed	Select the desired speed. The options that appear in the drop-down list depend on the maximum speed that your network can support (for example, 10 Gbps). Possible values include: Auto-negotiate 10 Gbps 25 Gbps 40 Gbps 50 Gbps 100 Gbps Note: The configured NVMe over RoCE port speed should match the speed capability of the SFP on the selected port. All ports must be set to the same speed.
Enable IPv4 and/or Enable IPv6	Select one or both options to enable support for IPv4 and IPv6 networks.
MTU size (Available by clicking Show more port settings.)	If necessary, enter a new size in bytes for the maximum transmission unit (MTU). The default MTU size is 1500 bytes per frame. You must enter a value between 1500 and 4200.

Port Setting

Description

Configured ethernet port speed

Select the desired speed.

The options that appear in the drop-down list depend on the maximum speed that your network can support (for example, 10 Gbps). Possible values include:

Auto-negotiate
10 Gbps
25 Gbps
40 Gbps
50 Gbps
100 Gbps

Note: The configured NVMe over RoCE port speed should match the speed capability of the SFP on the selected port. All ports must be set to the same speed.

Enable IPv4 and/or Enable IPv6

Select one or both options to enable support for IPv4 and IPv6 networks.

MTU size

(Available by clicking Show more port settings.)

If necessary, enter a new size in bytes for the maximum transmission unit (MTU).

The default MTU size is 1500 bytes per frame. You must enter a value between 1500 and 4200.

If you selected Enable IPv4, a dialog box opens for selecting IPv4 settings after you click Next. If you selected Enable IPv6, a dialog box opens for selecting IPv6 settings after you click Next. If you selected both options, the dialog box for IPv4 settings opens first, and then after you click Next, the dialog box for IPv6 settings opens.

Configure the IPv4 and/or IPv6 settings, either automatically or manually. To see all port settings, click the Show more settings link on the right of the dialog box.

Port setting	Description
Automatically obtain configuration from DHCP server	Select this option to obtain the configuration automatically.
Manually specify static configuration	Select this option, and then enter a static address in the fields. For IPv4, include the network subnet mask and gateway. For IPv6, include the routable IP addresses and router IP address. Note: If there is only one routable IP address, set the remaining address to 0:0:0:0:0:0:0:0.
Enable VLAN support (Available by clicking Show more settings.)	Important: This option is only available in an iSCSI environment. It is not available in an NVMe over RoCE environment. Select this option to enable a VLAN and enter its ID. A VLAN is a logical network that behaves like it is physically separate from other physical and virtual local area networks (LANs) supported by the same switches, the same routers, or both.
Enable ethernet priority (Available by clicking Show more settings.)	Important: This option is only available in an iSCSI environment. It is not available in an NVMe over RoCE environment. Select this option to enable the parameter that determines the priority of accessing the network. Use the slider to select a priority between 1 and 7. In a shared local area network (LAN) environment, such as Ethernet, many stations might contend for access to the network. Access is on a first-come, first-served basis. Two stations might try to access the network at the same time, which causes both stations to back off and wait before trying again. This process is minimized for switched Ethernet, where only one station is connected to a switch port.

Click Finish.