HP-UX 11i Version 2 May 2005 Release Notes

Workstation- and Server-Specific Information
Always-Installed Networking Drivers
Chapter 4
79
• Checksum Offload (CKO) changes for the iether and igelan Gigabit Ethernet
drivers:
These Gigabit Ethernet drivers now allow customers to turn the CKO feature of the
Gigabit Ethernet interface ON or OFF. With this and subsequent versions of the
iether and igelan drivers, the default for receive-side CKO will be OFF (disabled).
The current CKO settings can be determined with the following command:
lanadmin -x cko < ppa >
If desired, the previous settings can be restored with the new driver by using the
lanadmin -X command. The exact lanadmin commands are as follows (note that the
X is capitalized in these commands):
lanadmin -X send_cko_on < ppa >
lanadmin -X recv_cko_on < ppa >
Example settings for the iether driver:
The settings are preserved across reboots by setting both HP_IETHER_SEND_CKO and
HP_IETHER_RECV_CKO to ON or OFF in the /etc/rc.config.d/hpietherconf file.
• Support of 1000FD mode of switches:
HP-UX 1000Base-T ports will support a link partner (switch or end-station) that is
operating in 1000FD fixed/manual mode. Please ensure that your setting is one of
the following supported configurations:
Impact
With the Gigabit Ethernet drivers updated for this release, CKO settings can be set to
what they used to be prior to this release by using the lanadmin -X command. The exact
lanadmin commands are as follows (note that the X is capitalized in these commands):
lanadmin -X send_cko_on < ppa >
lanadmin -X recv_cko_on < ppa >
Example settings for the iether driver:
Table 4-2 HP-UX 1000Base-T Supported Configurations
HP-UX 1000Base-T
Port
Link Partner Resulting Speed
AUTO AUTO Highest Common Speed (HP-UX
supports 10/100/1000)
AUTO 1000 FD
fixed/manual
1000 Mbit/s FD
10 HD 10 HD (for example,
a 10Base-T Hub)
10 Mbit/s HD
10 FD 10 FD 10 Mbit/s FD
100 HD 100 HD 100 Mbit/s HD
100 FD 100 FD 100 Mbit/s FD