1、 TIA-1057 April 2006Telecommunications IP Telephony Infrastructure Link Layer Discovery Protocol for Media Endpoint DevicesANSI/TIA-1057 - 2006 APPROVED: APRIL 6, 2006 REAFFIRMED: AUGUST 26, 2011 NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through elim
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22、ND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. Link Layer Discovery Protocol - Media Endpoint Discovery ANSI/TIA-1057 i Table of Contents 1 Introduction.1 1.1 General . 1 1.2 Purpose 1 1.3 Document Conventions 2 2 Scope .3 2.1 Scope of Current Standard Release. 3 2.2 Futur
23、e Considerations 4 3 Normative References6 4 Definitions, Abbreviations and Acronyms8 4.1 Terminology Definitions 8 4.2 Abbreviations and Acronyms 9 5 IEEE 802.1AB LLDP Overview (Informative) 11 5.1 LLDP - Frame Format. 11 5.2 LLDP - Optional TLVs. 12 5.3 Organizationally-specific TLV extensions . 1
24、3 6 Media Endpoint Discovery Reference Model and Definitions (Normative) 16 6.1 LLDP-MED Network Connectivity Device Definition. 16 6.2 LLDP-MED Endpoint Device Definition. 17 6.2.1 LLDP-MED Generic Endpoint (Class I) 18 6.2.2 LLDP-MED Media Endpoint (Class II) 18 6.2.3 LLDP-MED Communication Endpoi
25、nt (Class III) . 18 7 Media Endpoint Discovery Functional Description (Normative). 19 7.1 LLDP-MED Capabilities Discovery . 20 7.2 LAN Speed and Duplex Discovery 20 7.3 Network Policy Discovery . 20 7.4 LAN Level Endpoint Location Discovery. 21 7.5 Endpoint Location Identification Discovery . 21 7.6
26、 Endpoint Move Detection Notification. 22 7.7 Extended Power Via MDI Discovery. 23 7.8 Inventory Management Discovery 23 7.9 Embedded Network Connectivity Discovery. 24 Link Layer Discovery Protocol - Media Endpoint Discovery ANSI/TIA-1057 ii 7.10 LLDP-MED Fast Start Protocol Behavior 24 8 LLDP-MED
27、Device Requirements (Normative) . 25 8.1 Network Connectivity Device Requirements. 26 8.2 Endpoint Device Requirements 26 8.2.1 Requirements for Generic Endpoints (Class I). 26 8.2.2 Requirements for Media Endpoints (Class II) 27 8.2.3 Requirements for Communication Device Endpoints (Class III) 27 9
28、 Usage of IEEE 802.1AB Specification (Normative) 29 9.1 Usage of IEEE 802.1AB Specification Mandatory Elements 29 9.2 Usage of IEEE 802.1AB TLVs 29 9.2.1 IEEE 802.1AB System Capabilities TLV 29 9.2.1.1 System Capabilities 30 9.2.1.2 Enabled Capabilities . 30 9.2.1.3 System Capabilities TLV usage rul
29、es in LLDP-MED 30 9.2.2 IEEE 802.3 MAC/PHY Configuration/Status TLV 31 9.2.3 IEEE 802.1AB Chassis ID and Port ID TLVs . 31 9.2.4 IEEE 802.3 Power Via MDI TLV (Informational) 32 10 LLDP-MED Organizationally Specific TLVs (Normative) . 34 10.1 LLDP-MED OUI Value 34 10.2 LLDP-MED TLV Definitions and Fo
30、rmats . 34 10.2.1 LLDP-MED TLV Sets Definition . 35 10.2.1.1 Network Connectivity TLV Set 36 10.2.1.2 Endpoint Class I TLV Set 36 10.2.1.3 Endpoint Class II TLV Set. 37 10.2.1.4 Endpoint Class III TLV Set 37 10.2.1.5 Optional Inventory Management TLV Set. 38 10.2.2 LLDP-MED Capabilities TLV 38 10.2.
31、2.1 LLDP-MED Capabilities 39 10.2.2.2 LLDP-MED Device Type. 40 10.2.2.3 LLDP-MED Capabilities TLV usage rules. 40 10.2.3 Network Policy TLV 40 10.2.3.1 Application Type . 41 10.2.3.2 Unknown Policy Flag (U) 43 10.2.3.3 Tagged Flag (T) 43 10.2.3.4 Reserved (X). 43 10.2.3.5 VLAN ID 43 10.2.3.6 Layer 2
32、 Priority 44 10.2.3.7 DSCP Value 44 10.2.3.8 Network Policy TLV usage rules. 44 10.2.4 Location Identification TLV. 45 10.2.4.1 Location ID string length . 46 10.2.4.2 Location data format . 46 10.2.4.3 Location ID 46 10.2.4.3.1 Coordinate-based LCI data format 46 10.2.4.3.2 Civic Address LCI data f
33、ormat. 47 Link Layer Discovery Protocol - Media Endpoint Discovery ANSI/TIA-1057 iii 10.2.4.3.3 ECS ELIN data format. 48 10.2.4.4 Location Identification TLV usage rules 49 10.2.5 Extended Power-Via-MDI TLV. 49 10.2.5.1 Power Type. 50 10.2.5.2 Power Source . 50 10.2.5.3 Power Priority . 51 10.2.5.4
34、Power Value . 52 10.2.5.5 Extended Power-Via-MDI TLV usage rules 54 10.2.6 Inventory Management TLV Set 55 10.2.6.1 Hardware Revision TLV 55 10.2.6.1.1 Hardware Revision string length 56 10.2.6.1.2 Hardware revision . 56 10.2.6.1.3 Hardware revision TLV usage rules 56 10.2.6.2 Firmware Revision TLV
35、56 10.2.6.2.1 Firmware Revision string length 56 10.2.6.2.2 Firmware revision 57 10.2.6.2.3 Firmware revision TLV usage rules. 57 10.2.6.3 Software Revision TLV . 57 10.2.6.3.1 Software Revision string length. 57 10.2.6.3.2 Software revision. 57 10.2.6.3.3 Software revision TLV usage rules 57 10.2.6
36、.4 Serial Number TLV . 58 10.2.6.4.1 Serial Number string length. 58 10.2.6.4.2 Serial number 58 10.2.6.4.3 Serial number TLV usage rules. 58 10.2.6.5 Manufacturer Name TLV 58 10.2.6.5.1 Manufacturer Name string length 59 10.2.6.5.2 Manufacturer name . 59 10.2.6.5.3 Manufacturer name TLV usage rules
37、 59 10.2.6.6 Model Name TLV 59 10.2.6.6.1 Model Name string length . 59 10.2.6.6.2 Model Name 59 10.2.6.6.3 Model name TLV usage rules . 59 10.2.6.7 Asset ID TLV. 60 10.2.6.7.1 Asset ID string length 60 10.2.6.7.2 Asset ID. 60 10.2.6.7.3 Asset ID TLV usage rules 60 11 LLDP-MED Protocol Interactions
38、(Normative) 61 11.1 Conservation of LLDPDU Space 61 11.2 Network Connectivity Device Protocol Interactions 61 11.2.1 Protocol Initialization 61 11.2.2 Frame Transmission 62 11.2.3 Transmit State Machine Diagram. 62 11.2.4 Frame Reception 63 11.2.5 Remote systems MIB TTL expiration. 64 11.3 Endpoint
39、Device Protocol Interactions 64 11.3.1 Protocol Initialization 64 11.3.2 Frame Transmission 64 Link Layer Discovery Protocol - Media Endpoint Discovery ANSI/TIA-1057 iv 11.3.3 Transmit State Machine Diagram. 65 11.3.4 Frame Reception 66 11.4 Frame Validation. 66 11.5 LLDP-MED Interaction with IEEE 8
40、02.1X (Informative) 67 12 LLDP-MED Management (Normative) 68 12.1 LLDP-MED Global Variables 68 12.2 Relationship Between LLDP-MED Variables and Managed Objects 68 12.3 Topology Change Notification. 70 13 LLDP-MED MIB Module (Normative) . 72 13.1 The Internet-Standard Management Framework 72 13.2 Sec
41、urity Considerations for SNMP in LLDP-MED 72 13.3 LLDP-MED MIB Definition 73 ANNEX A: PICS Proforma for LLDP-MED (Normative) 103 ANNEX B: Content of Civic Address LCI data format (Normative) 108 ANNEX C: LLDP-MED Support for Voice over Wireless LAN (Informative). 116 ANNEX D: Informative References
42、119 Link Layer Discovery Protocol - Media Endpoint Discovery ANSI/TIA-1057 v Figures Figure 1 LLDP PDU Format 12 Figure 2 TLV Format* .12 Figure 3 Basic format for organizationally-defined extension TLVs 14 Figure 4 LLDP-MED Reference Model . 16 Figure 5 IEEE 802.1AB System Capabilities TLV. 30 Figu
43、re 6 LLDP-MED Capabilities TLV Format 39 Figure 7 Network Policy TLV Format 41 Figure 8 Location Identification TLV Format. 46 Figure 9 Coordinate-based LCI data format . 47 Figure 10 Civic Address LCI data format 47 Figure 11 ECS ELIN data format 48 Figure 12 Extended Power-via-MDI TLV Format 50 Fi
44、gure 13 Hardware Revision TLV Format . 56 Figure 14 Firmware Revision TLV Format 56 Figure 15 Software Revision TLV Format. 57 Figure 16 Serial Number TLV Format. 58 Figure 17 Manufacturer Name TLV Format 58 Figure 18 Model Name TLV Format . 59 Figure 19 Asset ID TLV Format 60 Figure 20 Network Conn
45、ectivity Device Transmit State Machine . 63 Figure 21 Endpoint Device Transmit State Machine. 66 Figure 22 VoWLAN Reference Topology for Standard APs . 116 Link Layer Discovery Protocol - Media Endpoint Discovery ANSI/TIA-1057 vi Tables Table 1 Discovery Function / TLV or MIB Cross Reference . 19 Ta
46、ble 2 IEEE 802.1AB TLV usage requirements in LLDP-MED LLDPDUs 29 Table 3 System Capability Values*. 30 Table 4 LLDP-MED Organizationally Specific TLVs. 35 Table 5 Network Connectivity TLV Set . 36 Table 6 Endpoint Class I TLV Set. 37 Table 7 Endpoint Class II TLV Set 37 Table 8 Endpoint Class III TL
47、V Set. 38 Table 9 Optional Inventory Management TLV Set 38 Table 10 LLDP-MED Capability Values 39 Table 11 LLDP-MED Device Type Values 40 Table 12 Application Type 42 Table 13 VLAN ID. 44 Table 14 Location data format type values.46 Table 15 Power-via-MDI Device Type Field Values . 50 Table 16 Power
48、 Source Field Values . 51 Table 17 Power Priority Field Values 52 Table 18 Power Value Field Format . 53 Table 19 Mapping of IEEE 802.3af Power Class to Power Value. 53 Table 20 Inventory TLV to Entity MIB Mapping 55 Table 21 LLDP-MED variable / MIB object cross-references . 68 Table 22 TLV variable
49、 / local-system MIB object cross-references 69 Table 23 TLV variable / remote-system MIB object cross-references 70 Table 24 Applicability of LLDP TLVs for VoWLAN 118 Link Layer Discovery Protocol - Media Endpoint Discovery ANSI/TIA-1057 vii Table 25 Applicability of LLDP-MED Extended TLVs for VoWLAN 118 Link Layer Discovery Protocol - Media Endpoint Discovery ANSI/TIA-1057 viii Foreword (This foreword is not part of this Standard.) This document is a TIA Telecommunications standard produced
