Dell Emulex Family of Adapters - Manual (Page 592)

Emulex Drivers for Windows User Manual P010077-01A Rev. A
3. Configuration
NIC Driver Configuration
592
Table 3-3 Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, and Windows Server 2012 R2 NIC
Driver Options
Option Name Acceptable Values
Supported Operating
Systems
Definition
Class of Service
(802.1p) Automatic Priority (default)
Filtered Priority
User Priority
Disable Priority Windows Server 2008
Windows Server 2008 R2
Windows Server 2012
Windows Server 2012 R2 The following modes are
supported for selecting 802.1p
priority tags:
• Automatic Priority – The DCBX
standard allows the network
adapter to negotiate priority
class usage with DCBX aware
endpoints such as switches or
network cards. If the peer
indicates that priority pause is
supported for a non-zero
priority, the NIC automatically
inserts the default priority in
all transmitted packets. This is
the default mode, allowing
priority pause to operate for
both storage and network
traffic. If the peer indicates a
zero default priority (such as
when the peer does not support
priority pause), the device uses
the “Non-Storage Priority”
mode discussed below.
• Filtered Priority – This mode
coerces the user priorities in
each packet to avoid sending
packets on the network
function that may disrupt the
converged adapter's storage
traffic. The network device
uses the next lower priority if a
conflict exists. This mode is
useful if multiple network
priorities are necessary. Only a
limited number of classes are
supported for priority pause, so
typically it does not function
optimally in this mode.
• User Priority – This mode allows
any user specified priority
value and should be limited to
cases where storage functions
are not used.
• Disable Priority – The adapter
always transmits either
untagged packets, or VLAN ID
(802.1q) tagged packets with a
priority value (802.1p) of zero.