Ethernet Support Guide for HP-UX 11i v3

Table 10 Configuration file and nwmgr flow control parameters
Transmit flow control parameterReceive flow control parameter
Driver
Configuration fileConfiguration file
nwmgrnwmgr
DefaultDefault
Not supportediether HP_IETHER_FLOW_CONTROL
rx_fctl
ON
Not supportedgelan HP_GELAN_FLOW_CONTROL
rx_fctl
ON
Not supportedigelan HP_IGELAN_FLOW_CONTROL
rx_fctl
ON
ixgbe HP_IXGBE_TX_FLOW_CONTROLHP_IXGBE_RX_FLOW_CONTROL
tx_fctlrx_fctl
ONON
1
icxgbe HP_ICXGBE_TX_FLOW_CONTROLHP_ICXGBE_RX_FLOW_CONTROL
tx_fctlrx_fctl
ONON
2
iexgbe HP_IEXGBE_TX_FLOW_CONTROLHP_IEXGBE_RX_FLOW_CONTROL
tx_fctlrx_fctl
ONON with non-Flex-10; OFF with Flex-10
43
iocxgbe HP_IOCXGBE_TX_FLOW_CONTROLHP_IOCXGBE_RX_FLOW_CONTROL
tx_fctlrx_fctl
ONON
1
When configured, the driver automatically generates a pause frame when the amount of data in the receive queue
exceeds the flow control threshold, which is defined by the configuration file HP_IXGBE_FLOW_CONTROL_THRESH
parameter or the nwmgr command fctrl_thresh parameter. The threshold value is expressed as a percentage of
the receive buffer size on the adapter. Values are 1 to 100.
2
When configured, the driver automatically generates a pause frame when the amount of data in the receive queue
exceeds the flow control threshold, which is defined by the configuration file HP_ICXGBE_FLOW_CONTROL_WMARKS
parameter or the nwmgr command fctrl_wmarks parameter. The threshold value is expressed as a percentage of
the receive buffer size on the adapter. Values are 10 to 90.
3
For current versions of this driver, the receive flow control default is off in Flex-10 environments; in non-Flex-10 environments,
receive flow control is turned off if Jumbo Frames are being used (MTU size greater than 1500). For more information,
see the latest release of the 10GigEthr-02 (iexgbe) B.11.31 Release Notes.
4
In Flex-10 environments, the transmit flow control can be set to ON only. Prior to release B.11.31.1205 of 10GigEthr-02
(iexgbe), the default value for all environments is OFF. For more information, see the appropriate version of the
10GigEthr-02 (iexgbe) B.11.31 Release Notes.
3.6.2 Displaying current flow control settings
The following examples show how to display current receive and transmit control settings.
28 Setting and displaying driver Ethernet parameters