Users Guide
Table Of Contents
- Revision History
- Table of Contents
- Regulatory and Safety Approvals
- Functional Description
- Network Link and Activity Indication
- Features
- Software and Hardware Features
- Virtualization Features
- VXLAN
- NVGRE/GRE/IP-in-IP/Geneve
- Stateless Offloads
- UDP Fragmentation Offload
- Stateless Transport Tunnel Offload
- Multiqueue Support for OS
- SR-IOV Configuration Support Matrix
- SR-IOV
- Network Partitioning (NPAR)
- RDMA over Converged Ethernet – RoCE
- Supported Combinations
- Installing the Hardware
- Software Packages and Installation
- Windows Driver Advanced Properties and Event Log Messages
- Teaming
- System-level Configuration
- ISCSI Boot
- VXLAN: Configuration and Use Case Examples
- SR-IOV: Configuration and Use Case Examples
- NPAR – Configuration and Use Case Example
- RoCE – Configuration and Use Case Examples
- DCBX – Data Center Bridging
Software Packages and InstallationNetXtreme-E User’s Manual
September 4, 2019 • NetXtreme-E-UG103 Page 36
Linux Ethtool Commands
Note: In Table 22, ethX should be replaced with the actual interface name.
Table 22: Linux Ethtool Commands
Command Description
ethtool -s ethX speed 25000 autoneg off Set the speed. If the link is up on one port, the driver will
not allow the other port to be set to an incompatible
speed.
ethtool -i ethX Output includes Package version, NIC BIOS version
(boot code).
ethtool -k ethX Show offload features.
ethtool -K ethX tso off Turn off TSO.
ethtool -K ethX gro off lro off Turn off GRO / LRO.
ethtool -g ethX Show ring sizes.
ethtool -G ethX rx N Set Ring sizes.
ethtool -S ethX Get statistics.
ethtool -l ethX Show number of rings.
ethtool -L ethX rx 0 tx 0 combined M Set number of rings.
ethtool -C ethX rx-frames N Set interrupt coalescing. Other parameters supported
are: rx-usecs, rx-frames, rx-usecs-irq, rx-frames-irq, tx-
usecs, tx-frames, tx-usecs-irq, tx-frames-irq.
ethtool -x ethX Show RSS flow hash indirection table and RSS key.
ethtool -s ethX autoneg on speed 10000 duplex full Enable Autoneg (see “Auto-Negotiation Configuration”
on page 45 for more details)
ethtool --show-eee ethX Show EEE state.
ethtool --set-eee ethX eee off Disable EEE.
ethtool --set-eee ethX eee on tx-lpi off Enable EEE, but disable LPI.
ethtool -L ethX combined 1 rx 0 tx 0 Disable RSS. Set the combined channels to 1.
ethtool -K ethX ntuple off Disable Accelerated RFS by disabling ntuple filters.
ethtool -K ethX ntuple on Enable Accelerated RFS.
Ethtool -t ethX Performs various diagnostic self-tests.
echo 32768 > /proc/sys/net/core/
rps_sock_flow_entries
echo 2048 > /sys/class/net/ethX/queues/rx-X/
rps_flow_cnt
Enable RFS for Ring X.
sysctl -w net.core.busy_read=50 This sets the time to busy read the device's receive ring
to 50 usecs. For socket applications waiting for data to
arrive, using this method can decrease latency by 2 or
3 usecs typically at the expense of higher CPU
utilization.
echo 4 > /sys/bus/pci/devices/0000:82:00.0/
sriov_numvfs
Enable SR-IOV with four VFs on bus 82, Device 0 and
Function 0.