10GigEthr-02 (iexgbe) B.11.31.1306 Ethernet Driver Release Notes

Workaround: Resolve the problem by resetting the link. Statistics will then be collected and
updated properly.
• Incorrect warning message after attempt to turn off Tx flow control for a Flex-10 interface
When an attempt is made to turn off Tx flow control for a Flex-10 interface, a warning message
indicates correctly that Tx flow control always stays on for Flex-10 interfaces; however, the
warning message displays the current value of Tx flow control as “Off” instead of “On”.
Severity: Minor
Workaround: Disregard the displayed state of Tx flow control.
• Rx flow control must be disabled when Jumbo Frames are used.
Due to limitations of the hardware supported by the iexgbe driver, Rx flow control must be
disabled when Jumbo Frames (MTU value greater than 1500) are enabled. This limitation is
enforced by the iexgbe driver. Therefore, if the current configuration has Rx flow control
enabled while Jumbo Frames are used, the iexgbe driver will not honor changes made to
flow control settings. Setting Jumbo Frames will override and disable the Rx flow control
settings.
NOTE: For the Flex-10 interface, Rx flow control is always set to OFF.
For the non-Flex-10 interface, you can change the flow control and MTU size as needed.
However, when Jumbo Frames are enabled, if Rx flow control is already set to ON, the driver
automatically resets RX flow control to OFF. Rx flow control and Jumbo Frames cannot both
be in operation at the same time.
Severity: Medium
Workaround: If you want Rx flow control, disable Jumbo Frames.
• Rx flow control is disabled in Flex-10 mode
In Flex-10 mode (Virtual Connect), Rx Flow control is disabled by default. Attempts to enable
Rx flow control are not honored by the driver, because the driver and hardware cannot
determine whether Jumbo Frames are disabled across all FlexNICs.
Severity: Medium
Workaround: No workaround necessary.
• Using ncweb to change number of receive queues causes an error message.
Severity: Medium
When you use the ncweb or SMH interface to change the number of receive queues, an error
message appears.
Workaround: Use nwmgr instead of ncweb to change number of the queues. The command
syntax is:
nwmgr -s -A drv_mq=<new#> -c lan<instance>
where
<new#> The number of queues that you want to enable.
<instance> Instance number of the LAN interface; for example, lan1.
5 Compatibility and installation requirements
This section describes the compatibility information and installation requirements for this release.
• For specific installation instructions, see the installation procedure or overview document for
your adapter.
• For detailed information on supported server platforms, operating systems, and firmware level
requirements, see the Ethernet Support Matrix.
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