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3 Non-Native HP-DLPI LAN Driver Migration
A non-native Networking driver relies on the HP-DLPI layer to interface with the transport layer.
A driver has to conform to the DLPI/driver interface specifications. Descriptions of how to write
a non-native driver are provided in the “Writing a LAN Driver Under HP-DLPI” chapter in the
HP-UX 11i v3 Driver Development Guide . For information on the HP-DLPI interfaces, see the
HP-DLPI manpages in the HP-UX 11i v3 Driver Development Reference.
The dl_hp_create_info_t data structure that is used during registration of the driver with
HP-DLPI has been extended with the following new fields. These new fields must be set
appropriately before registering with HP-DLPI:
• dhc_features_one_cap
• dhc_features_two_cap
• dhc_features_three_cap
The dhc_version data field must be set to 3 in 11i v3. Starting with 11i v3, registration of version
2 drivers will fail.
Starting with HP-UX 11i v3, non-native DLPI LAN drivers can set the following new features
bits in the dhc_features_one field if the relevant functionality is supported in the driver:
• DL_HP_DRV_USAGE_INFO
• DL_HP_DRV_SUPP_CRA
The HP-DLPI event entry point now supports a new event, DL_HP_EVENT_OLD. Drivers that
support online deletion can now use this event to ensure that all outbound data path and control
requests from DLPI to the driver are quiesced prior to the deletion of a driver instance. Non-native
HP-DLPI based drivers must ensure that the cause information that is passed on
DL_HP_EVENT_LINK_DOWN is correct as this information could be retrieved and used by nwmgr,
the SMH NIC Tool GUI, and Critical Resource Analysis (CRA) tools.
New LAN Command
Starting with HP-UX 11i v3, the nwmgr command is a new LAN command, replacing the
lanadmin, lanscan, and linkloop commands, which have been obsoleted in 11i v3.
The nwmgr command supports driver-specific shared libraries. In addition, it comes with a
common services shared library that provides most of the services required by a driver specific
shared library. For information on how to develop a driver-specific shared library for your
networking driver, see the “LAN Commands” chapter in the HP-UX 11i v3 Driver Development
Guide.
A fully functional nwmgr driver-specific shared library for a Native STREAMS DLPI driver is
provided as part of the ENET sample driver under the misc/netmgr directory in the ENET
driver sources. HP recommends that you use this shared library as a starting point instead of
writing one from scratch.
New Graphical User Interface
Starting with HP-UX 11i v3, a new Graphical User Interface (GUI) has been introduced to discover
and configure network interface cards. It is part of the new HP System Management Homepage
(SMH) web-based GUI and replaces the legacy SAM GUI, which have been obsoleted in 11i v3.
The SMH NIC Tool supports driver-specific shared libraries to enable IHVs to provide
driver-specific extensions. For information on how to develop a driver-specific shared library
for your networking driver, see the “Supporting the HP SMH NIC Tool in LAN Drivers” chapter
in the HP-UX 11i v3 Driver Development Guide. In addition, a fully functional SMH NIC Tool
driver specific shared library for a Native STREAMS DLPI driver is provided as part of the ENET
New LAN Command 19