Dell Emulex Family of Adapters - Manual (Page 599)

Emulex Drivers for Windows User Manual P010077-01A Rev. A
3. Configuration
NIC Driver Configuration
599
Receive Side Scaling Disabled
Enabled (default)
Windows Server 2008
Windows Server 2008 R2
Windows Server 2012
Windows Server 2012 R2 Support for multiple RSS queues if
enabled.
RSS scales receive processing over
multiple CPUs in parallel. This
scaling typically improves
application performance;
however, it tends to increase CPU
usage on low end machines.
For the OCe11102 adapter, RSS is
only supported on two primary
adapters per device.
For additional PCI functions, RSS
does not appear in the Properties
List.
Recv Segment
Coalescing (IPv4) Disabled (default on Windows
Server 2008, Windows Server
2008 R2)
Enabled (default on Windows
Server 2012) Windows Server 2008
Windows Server 2008 R2
Windows Server 2012
Windows Server 2012 R2 RSC merges multiple TCP segments
and identifies them as a single
coalesced unit to the operating
system's TCP/IP stack. This
reduces the per-packet receive
processing overhead and CPU
usage when standard 1514 byte
sized frames are in use.
Notes:
• If checksum offloads are
disabled, RSC should also be
disabled. RSC depends on
checksum offloads for better
performance.
• Both RSC (IPV4) and RSC (IPV6)
are coerced to zero if TCP
Connection Offload (IPV4) is
enabled.
Table 3-3 Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, and Windows Server 2012 R2 NIC
Driver Options (Continued)
Option Name Acceptable Values
Supported Operating
Systems
Definition