Users Guide

8–VMware Driver Software
Networking Support, Drivers
62 BC0054508-00 J
pri_map
Use the optional parameter pri_map to map the VLAN PRI value or the IP
DSCP value to a different or the same CoS in the hardware. This 32-bit parameter
is evaluated by the driver as 8 values of 4 bits each. Each nibble sets the required
hardware queue number for that priority.
For example, set the pri_map parameter to 0x22221100 to map priority 0 and
1 to CoS 0, map priority 2 and 3 to CoS 1, and map priority 4 to 7 to CoS 2. In
another example, set the pri_map parameter to 0x11110000 to map priority 0
to 3 to CoS 0, and map priority 4 to 7 to CoS 1.
dropless_fc
Use the optional parameter dropless_fc to enable a complementary flow
control mechanism on QLogic network adapters. The default flow control
mechanism is to send pause frames when the on-chip buffer (BRB) is reaching a
specific level of occupancy. This occupancy is a performance-targeted flow control
mechanism. On QLogic network adapters, you can enable another flow control
mechanism to send pause frames if one of the host buffers (when in RSS mode)
is exhausted. These pause frames provide a “zero packet drop” targeted flow
control mechanism.
To enable the dropless flow control mechanism feature on all QLogic network
adapters in the system, set the dropless_fc parameter to 1 as shown in the
following:
vmkload_mod bnx2x dropless_fc=1
RSS
Use the optional RSS parameter to specify the quantity of receive side scaling
queues. For VMware ESXi 6.0 U2 and 6.5, RSS values can be from 2 to 4;
RSS=1 disables RSS queues.
max_vfs
Use the optional parameter max_vfs to enable a specific quantity of virtual
functions. Values for max_vfs can be 1 to 64, or set max_vfs=0 (default) to
disable all virtual functions.
enable_vxlan_ofld
Use the optional parameter enable_vxlan_ofld to enable VXLAN task
offloads with TX TSO and TX CSO. For VMware ESXi 6.0 U2 and 6.5,
enable_vxlan_ofld=1 (default) enables VXLAN task offloads and
enable_vxlan_ofld=0 disables VXLAN task offloads.