lan(7) lan(7)
NAME [Toc] [Back]
lan - network I/O card access information
DESCRIPTION [Toc] [Back]
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 [Toc] [Back]
The Physical Point of Attachment (PPA) is a numerical value that
uniquely identifies a particular device. The PPA value can be
obtained from the lanscan command. 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 encapsulation 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.
WARNING [Toc] [Back]
The Link Level Access (LLA) interface is obsolete.
AUTHOR [Toc] [Back]
lan was developed by HP.
SEE ALSO [Toc] [Back]
lanscan(1M), lanadmin(1M), linkloop(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
Hewlett-Packard Company - 1 - HP-UX 11i Version 2: August 2003
lan(7) lan(7)
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
Hewlett-Packard Company - 2 - HP-UX 11i Version 2: August 2003 [ Back ] |
