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Mellanox MLNX-OS User Manual for SX1018HP Ethernet Managed Blade Switch

ManualsBrandsHP ManualsComputer AccessoriesMellanox SX1018HP Ethernet Switch for c-Class BladeSystem
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Rev 2.10
Mellanox Technologies
320
Mellanox Technologies Confidential
LWR is relevant only for 40GbE and InfiniBand FDR speeds in which the links are operational at
a 4X width.
LWR has three operating modes per interface:
• Disabled – LWR does not operate and the link re
mains in 4X under all circumstances.
• Automatic – the link automatically alternates between
4X and 1X based on traffic flow.
• Force – a port is forced to operate in 1X mode lowering th
e throughput capability of the
port. This mode should be chosen in cases where constant low throughput is expected
on the port for a certain time period – after which the port should be configured to one
of the other two modes, to allow higher throughput to pass through the port.
4.12.3 USB Access
MLNX-OS can access USB devices attached to switch systems. USB devices are automatically
recognized and mounted upon insertion. To access a USB device for reading or writing a file, you
need to provide the path to the file on the mounted USB device in the following format:
scp://username:password@hostname/var/mnt/usb1/<file name>
While username and password are the admin username and password and hostname is the IP of
the switch.
When “show interfaces” is used, a port’s speed appears unchanged even when only one
lane is active.
See command “power-management width” on page 354.
Table 24 - LWR Configuration Behavior
Switch-A Configuration Switch-B Configuration Behavior
Disable Disable LWR is disabled.
Disable Force Transmission from Switch-B to Switch-A operates at
1X. On the opposite direction, LWR is disabled.
Disable Auto Depending on traffic flow, transmission from Switch-
B to Switch-A may operate at 1X. On the opposite
direction, LWR is disabled.
Auto Force Transmission from Switch-B to Switch-A operates at
1 lane. Transmission from Switch-A to Switch-B may
operate at 1X depending on the traffic.
Auto Auto Width of the connection depends on the traffic flow
Force Force Connection between the switches operates at 1X