Users Guide

8–VMware Driver Software
Driver Parameters
Doc No. BC0054508-00 Rev. R
January 21, 2021 Page 76 Copyright © 2021 Marvell
DRSS
The DRSS parameter sets the number of RSS queues associated with the default
queue. The minimum number of RSS queues is 2; the maximum number is 4. To
disable this parameter, set it to 0 (default).
This parameter is used for VXLAN gateways, where multiple unknown MAC
addresses may be received by the default queue.
rss_engine_nr
The rss_engine_nr parameter sets the number of RSS engines. Valid values
are 0 (Disabled) or 1–4 (fixed number of RSS engines). The default is 4 RSS
engines.
enable_vxlan_filters
The enable_vxlan_filters parameter enables and disables the VXLAN
receive filters.
A VXLAN filter comprises the inner MAC address, the outer MAC address, and
the VXLAN Network Identifier (VNI). This filter is used to create NetQueues for a
VXLAN traffic flow.
Set to 0 (default) to disable VXLAN receive filters. Set to 1 to enable VXLAN
receive filters.
dropless_fc
The dropless_fc parameter is set to 1 (by default) to enable a complementary
flow control mechanism on 57xxx adapters. The normal flow control mechanism is
to send pause frames when the on-chip buffer (BRB) is reaching a specific level of
occupancy, which is a performance-targeted flow control mechanism. On 57xxx
adapters, you can enable a complementary flow control mechanism to send
pause frames when one or more of the host receive buffers are exhausted.
dropless_fc is a “zero packet drop” targeted flow control mechanism.
Set the dropless_fc parameter to 1 to enable the drop-less flow control
mechanism feature on all 57xxx adapters in the system.
max_vfs
The max_vfs parameter indicates the number of virtual functions (VFs) to be
enabled for each PCI function. Valid values are in the range of 0–164. A value
of 0 disables this feature. A value in the range of 1–64 indicates the number of
VFs to enable. The actual maximum VF count depends on the on 57xxx adapter
hardware.
auto_recovery
The auto_recovery parameter enables or disables automatic recovery of the
interface after detecting a hardware error. Set auto_recovery to 1 (default) to
enable automatic recovery of the interface.