HP UX 11i v2 Networking Software manual Data Link Layer, Service Interface

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Introduction to DLPI

The Data Link Layer

The Data Link Layer

The data link layer (layer 2 in the OSI Reference Model) is responsible for the transmission and error-free delivery of bits of information over a physical communications medium. The model deﬁnes networking functionality at several layers and service providers between the layers.

A model of the data link layer is presented here to describe concepts that are used throughout this guide. It is described in terms of an interface architecture, as well as addressing concepts needed to identify different components of that architecture. The description of the model assumes familiarity with the OSI Reference Model.

The Service Interface

Each layer of the OSI Reference Model has two standards:

•one that deﬁnes the services provided by the layer.

•one that deﬁnes the protocol through which layer services are provided.

DLPI is an implementation of the ﬁrst type of standard. It speciﬁes an interface to the services of the data link layer. Figure 1-1 illustrates how DLPI performs this function.

Chapter 1

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Contents Edition Dlpi Programmer’s GuideLegal Notices Page Page Contents Contents Contents Sample Programs Printing History Page Appendix a Sample Programs PrefacePage Introduction to Dlpi Introduction to Dlpi HP Dlpi Features Header Files Device File FormatData Link Layer Service InterfaceDlpi Modes of Communication Connection-mode ServiceData Link Layer Physical Attachment Identiﬁcation Connectionless-mode ServiceDlpi Addressing HP PPA Format HP’s Dlsap Address Format 802.3, Ethernet, Token Ring, Fddi Data Link User IdentiﬁcationHP’s Dlsap Address Format for Fibre Channel Dlsap Promiscuous Mode Clariﬁcations Dlpi Services Dlinforeq DlerrorackDlinfoack DlhpppareqDlresetind DlresetreqDlresetres DlresetconInformation Reporting Service Local Management ServicesDlhprawdatareq DlhprawdataindBind Service Attach ServiceSnap BindingReserved IEEESAPS/Ethertypes Message Flow Binding a Stream to a Dlsap Message Flow Enabling a Speciﬁc Multicast Address on a Connection Establishment Service Connection-mode Services12 Message Flow Successful Connection Establishment Connection Handoff13 Message Flow Token Retrieval 16 Message Flow Both Primitives are Destroyed by Provider 19 Message Flow Normal Data Transfer Data Transfer Service20 Message Flow DLS User-Invoked Connection Release Connection Release ServiceReset Service 23 Message Flow DLS User-Invoked Connection Reset Connectionless Data Transfer Connectionless-mode ServicesError Reporting Service Raw-mode ServicesRaw-mode Data Transfer XID and Test ServiceXID and Test Packet Handling 31 Message Flow XID ServiceAn Example 32 Message Flow Test Service33 Message Flow a Connection-Mode Example Dlpi Primitives Dlpi Primitives PPA Initialization/De-initialization Local Management PrimitivesDlhpppareq Dlhpppaack Dlhpppaack MTU DlinforeqDlinfoack Dltpb DlcsmacdDltpr DlmetroDlctca DlcharDlfddi DlotherDlunknown DlhprawdlsDlacldls DLSTYLE2 DLSTYLE1Dlbadppa DlaccessDlattachreq Dlsyserr DldetachreqDloutstate Dlbindreq Dlnotinit DlbadaddrDlinitfailed Dlbindack Dlunbindreq Dlsubsbindreq Dlhierarchicalbind DlpeerbindDltoomany DlsubsbindackDlsubsunbindreq Dlenabmultireq Dlnotsupported DldisabmultireqDlnotenab DlpromisconreqDlpromiscmulti DlpromiscphysDlpromiscsap Dlpromiscoffreq Dlokack Dlerrorack Dlphysaddrreq Dlfactphysaddr Dlcurrphysaddr Dlsetphysaddrreq DlphysaddrackDlphysaddrack DlphysaddrreqDlsetphysaddrreq Dlgetstatisticsack DlgetstatisticsreqDlbusy DlgetstatisticsreqDlgetstatisticsack DlhpmulticastlistreqDlhpmulticastlistack Dlhpmulticastlistack Dlunitdatareq Connectionless-mode Service PrimitivesDlbaddata Dlunitdataind Dluderrorind Message is valid in state Dlidle Dlhprawdatareq Raw Mode Service PrimitivesDlbadprim DlhprawdataindRaw Mode Service Primitives Dlhpinforeq Connection-mode Service PrimitivesConnection-Oriented Dlpi Extensions Dlhpinforeq DlhpinfoackDlhpinfoack Connection-mode Service Primitives Connection-mode Service Primitives Dlhpsetacktoreq DlhpsetacktoreqDlhpsetptoreq DlhpsetptoreqDlhpsetrejtoreq DlhpsetrejtoreqDlhpsetbusytoreq Dlhpsetbusytoreq DlhpsetsendacktoreqDlhpsetmaxretriesreq DlhpsetmaxretriesreqDlhpsetsendacktoreq DLOUTCONPENDING, Dlinconpending DlhpsetackthreshreqDlhpsetlocalwinreq Dlhpsetremotewinreq Dlhpsetremotewinreq DlhpclearstatsreqDlhpsetlocalbusyreq DlhpsetlocalbusyreqDlhpclearstatsreq Dlhpclearlocalbusyreq DlhpclearlocalbusyreqDlconnectreq Dlbadqostype DlconnectindDlbadqosparam 112 Dlconnectres 114 Dlbadtoken DlconnectconDlbadcorr Dlpending116 Dltokenack DltokenreqDldatareq Dldisconnectreq Dldataind120 Dldisconnectind Dlresetreq Dlresetind Dlresetres Dlresetcon 126 Dltestreq Primitives to Handle XID and Test OperationsDltestauto DltestindChapter 129 Dltestres Dltestcon Dlxidreq Dlxidauto Dlxidind134 Dlpollfinal DlxidresDlxidcon Chapter 137 Dlpi States Dlresetcon Prov Reset Dlprovreset User Reset DluserresetDlresetres Resetres Udqos Pend DludqosPend Pending DLDISCON9Dlinconpending DLDISCON11Chapter 141 142 Sample Programs Longareasize Connection ModeAppendix a 145 146 Appendix a 147 148 Appendix a 149 150 Appendix a 151 152 Appendix a 153 154 Appendix a 155 Snap SAP Connectionless ModeAppendix a 157 158 Appendix a 159 160 Appendix a 161 162 Appendix a 163 164 Appendix a 165 166 Raw Mode 168 Appendix a 169 170 Appendix a 171 Raw Mode 172 Connection establishment Glossary174 Glossary Index

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