Ethernet Support Guide for HP-UX 11i v3

Example 15 Displaying current CKO parameter values
To determine the current CKO settings, enter the nwmgr command in the following format:
nwmgr -g -A all -c lanppa
Sample output (port 2):
lan2 current values:
Transmit Checksum Offload = On
Example 16 Setting CKO parameter values
The names of the configuration file parameters that set receive and transmit CKO vary from driver
to driver. Table 12 (page 33) lists the configuration file CKO parameter name for each driver that
supports the feature.
Table 12 Configuration file parameter name for setting TCP segment reassembly (supported drivers
only)
CKO parameter nameDriver
gelan HP_GELAN_RECV_CKO
HP_GELAN_SEND_CKO
igelan HP_IGELAN_RECV_CKO
HP_IGELAN_SEND_CKO
iether HP_IETHER_RECV_CKO
HP_IETHER_SEND_CKO
ixgbe HP_IXGBE_RX_CHECKSUM_OFFLOAD
HP_IXGBE_TX_CHECKSUM_OFFLOAD
icxgbe HP_ICXGBE_CKO_IPV4_RX
HP_ICXGBE_CKO_IPV4_TX
iexgbe HP_IEXGBE_RX_CHECKSUM_OFFLOAD
HP_IEXGBE_TX_CHECKSUM_OFFLOAD
iocxgbe HP_IOCXGBE_RX_CHECKSUM_OFFLOAD
HP_IOCXGBE_TX_CHECKSUM_OFFLOAD
For example, to enable receive and transmit CKO for the iether driver, edit the configuration
file /etc/rc.config.d/hpietherconf to specify the parameters as follows:
HP_IETHER_SEND_CKO=ON
HP_IETHER_RECV_CKO=ON
Alternatively, use the nwmgr command with the --sa option to set CKO values across reboots.
The parameters to set CKO are the same for all drivers: rx_cko for receive CKO and tx_cko
for transmit CKO. For example, use these commands to turn on receive and send CKO for the
device and port identified by ppa:
nwmgr --sa -A tx_cko=on -c lanppa
nwmgr -s -A rx_cko=on -c lanppa
For details about CKO parameter options, refer to the appropriate nwmgr_driver(1m) manpage.
3.9 Displaying and setting the Checksum Offload (CKO) parameter 33