Dell Emulex Family of Adapters - Manual (Page 637)

Emulex Drivers for Windows User Manual P010077-01A Rev. A
3. Configuration
NIC Driver Configuration
637
Mapping the RoCE-Enabled Client to the Server-Side Storage
Using an available network share with the proper permissions configured, open an
SMB share from the Windows Run command or from the command prompt, by typing:
"net use [devicename:*] [\\computername\sharename]
By default this creates two RDMA connections per SMB Direct-enabled network
interface on a particular server. Each SMB Direct connection maps to an RDMA queue
pair. Both the client and server must negotiate support for SMB Direct. If available,
each TCP connection is offloaded to an RDMA queue pair.
Figure 3-12 SMB Share - Two RDMA Connections Per RDMA-Enabled Network Interface
The PowerShell command, “Get-NetAdapterStatistics”, shows the RDMA Statistics
which indicate the number of failed connection attempts.
Figure 3-13 Get-NetAdapterStatistics
SMB Multichannel
For each SMB session, SMB multichannel establishes two SMB Direct connections to a
particular server by default. It also makes use of multiple RDMA-capable NIC
interfaces, if available.
Opening a file share from a 2-port OCe14000-series adapter (both ports are
RDMA-enabled) connected back-to-back to another 2-port OCe14000-series adapter
(both ports are also RDMA-enabled) creates two SMB Direct connections per interface.