lan.7 (2010 09)

l
lan(7) lan(7)
NAME
lan - network I/O card access information
DESCRIPTION
This manual entry gives a brief description on how to access the LAN device driver at Layer 2 (Data Link
Layer) of the OSI architecture. The LAN device driver controls the various LAN interface cards (e.g,
Ethernet/IEEE 802.3, FDDI, Token Ring) at Layer 1 (Physical Layer).
The Data Link Provider Interface (DLPI) is the supported method for accessing the LAN device driver at
Layer 2. DLPI is intended for use by knowledgeable network users only. Refer to the DLPI
Programmer’s Guide for complete programming details.
There are HP and non-HP drivers and interface cards which will provide their own DLPI module. These
types of DLPI are referred to as "native" DLPI.
Overview
The Physical Point of Attachment (PPA) is a numerical value that uniquely identifies a particular device.
The PPA value can be obtained from the
nwmgr and lanscan commands. The "ClassInstance"
identifier in the
nwmgr output is the concatenation of the driver class (lan) and the PPA number. The
"NamePPA" identifier in the
lanscan output is a concatenation of the interface name and the PPA
number. The
card instance value for a lan device is equivalent to the PPA number for that device.
A single hardware device may have multiple "NamePPA" identifiers, which indicates multiple encapsula-
tion methods supported for to the device. For Ethernet/IEEE 802.3 links, the "Name"
lan is used to
designate Ethernet encapsulation, and
snap for IEEE 802.3 encapsulation. For other links (FDDI,
Token Ring), only the
lan encapsulation designation is used.
Methods of transfer over the DLPI interface through the lan devices include "raw", "connectionless", and
"connection-oriented" data transfers.
WARNINGS
The
lanadmin, lanscan and linkloop commands are deprecated. These commands will be
removed in a future HP-UX release. HP recommends the use of replacement command nwmgr(1M) to
perform all network interface-related tasks.
AUTHOR
lan was developed by HP.
SEE ALSO
lanscan(1M), lanadmin(1M), linkloop(1M), nwmgr(1M).
DLPI Programmer’s Guide , 1995, Hewlett-Packard
The Ethernet, A LAN: Data Link Layer and Physical Specification , Version 2.0, November 1982, Digital
Equipment Corporation, Intel Corporation, Xerox Corporation
CSMA/CD Access Method and Physical Layer Specification , 1996, Institute of Electrical and Electronic
Engineers
Demand-Priority Access Method, Physical Layer & Repeater Specifications , 1996, Institute of Electrical
and Electronic Engineers
Fiber Distributed Data Interface (FDDI) Physical Layer Medium Dependent (PMD), 1995, ANSI
Token Ring Access Method and Physical Layer Specification , 1995, Institute of Electrical and Electronic
Engineers
802.3u Media Access Control Parameters, Physical Layer, Medium Attachment Units, and Repeater for
100 Mb/s Operation, Type 100BASE-T, 1995, Institute of Electrical and Electronic Engineers
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1