User Manual

Rev 2.3-1.0.1
Mellanox Technologies
203
5.3 InfiniBand Related Issues
Table 11 - InfiniBand Related Issues
Issue Cause Solution
The following mes-
sages is logged after
loading the driver:
multicast join
failed with status -
22
Trying to join a multicast
group that does not exist or
exceeding the number of
multicast groups supported
by the SM.
If this message is logged often, check
for the multicast group's join require-
ments as the node might not meet them.
Note: If this message is logged after
driver load, it may safely be ignored.
Unable to stop the
driver with the follow-
ing on screen message:
ERROR: Module <mod-
ule> is in use
An external application is
using the reported module.
Manually unloading the module using
the '
modprobe -r' command.
Logical link fails to
come up while port logi-
cal state is Initializing.
The logical port state is in
the Initializing state while
pending the SM for the LID
assignment.
1. Verify an SM is running in the fabric.
Run 'sminfo' from any host connected
to the fabric.
2. If SM is not running, activate the SM on
a node or on managed switch.
Degraded performance
is measured when hav-
ing a mixed rate envi-
ronment (10GbE,
40GbE and 56GbE).
Sending traffic from a node
with a higher rate to a node
with lower rate.
Enable Flow Control on both switch's
ports and nodes:
• On the server side run:
ethtool -A <interface> rx on
tx on
• On the switch side run the following
command on the relevant interface:
send on force and receive on
force
No link with break-out
cable.
Misuse of the break-out
cable or misconfiguration
of the switch's split ports
• Use supported ports on the switch
with proper configuration. For fur-
ther information, please refer to the
MLNX_OS User Manual.
• Make sure the QSFP break-out cable
side is connected to the SwitchX.
Table 10 - Ethernet Related Issues
Issue Cause Solution