10GigEthr-02 (iexgbe) B.11.31.1303.01 Ethernet Driver Release Notes

Table 1 10GigEthr-02 flow control and Jumbo Frames support matrix
Tx flow controlRx flow controlMTU
ON/OFFON/OFF1500 (non-Flex-10 ports)
Default setting during driver
initialization before startup
Default setting during driver
initialization before startup config
parameters are applied will be: ON configuration parameters are applied
will be: ON
ON/OFF
Default setting during driver
initialization before startup
OFF only.
NOTE:
1. If previous value is ON, setting
MTU to 9000 automatically sets Rx
flow control to OFF.
2. If the MTU value is changed back
to 1500, the original Rx flow
control setting (rx_fctrl) prior
to changing to 9000 MTU is
restored.
9000 (non-Flex-10 ports)
configuration parameters are applied
will be: ON
Only ONOnly OFF1500 (Flex-10 ports)
Only ONOnly OFF9000 (Flex-10 ports)
For non-Flex-10 interfaces, Tx and Rx flow control will be enabled by default. Setting Jumbo Frames
MTU disables Rx flow control; Rx flow control cannot be enabled if the interface has a Jumbo
Frames MTU.
For Flex-10 interfaces, Tx flow control is always enabled and Rx flow control is always disabled.
Table 2 (page 7) lists new configuration file parameters for non-Flex-10 interfaces. These
parameters are added to the configuration file /etc/rc.config.d/hpiexgbeconf at installation
if the file has not been previously modified by the customer. If the file has been previously modified,
the configuration file is not automatically modified with the new parameters, and the configuration
file must be updated manually. The new version will be available in file
usr/newconfig/etc/rc.config.d/hpiexgbeconf.
Table 2 Configuration file parameters for non-Flex-10 interfaces
1
DefaultValid valuesFunctionCommand
ONON/OFFEnable or Disable the
adapter's Tx-side flow
control
HP_IEXGBE_TX_FLOW_CONTROL
ONON/OFFEnable or Disable the
adapter's Rx-side flow
control
HP_IEXGBE_RX_FLOW_CONTROL
1
For Flex-10 interfaces, the configuration parameters described in this table will fail if changed from the default settings
listed in column 4. The defaults are permanent settings.
The following warning messages have been added to the nwmgr command:
• Setting MTU size greater than 1500 (enabling Jumbo Frames) for a non-Flex-10 interface
brings up the warning message shown in the following example:
server2#nwmgr -s -A mtu=9000 -c lan3
WARNING: For non-flex10 interface, setting Jumbo MTU will automatically turn OFF Rx flowcontrol
lan3 current values:
New MTU = 9000
• Attempting to turn off Tx flow control for a Flex-10 interface brings up the warning message
shown in the following example:
server2#nwmgr -s -A tx_fctrl=off -c lan3
2 New and changed features in this release 7