IEEE 802.1aq-2012

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IEEE Standard for Local and metropolitan area networks–Media Access Control (MAC) Bridges and Virtual Bridged Local Area Networks–Amendment 20: Shortest Path Bridging

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IEEE	2012

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Description

Amendment Standard – Superseded. This amendment to IEEE Std 802.1Q-2011 specifies shortest path bridging of unicast and multicast frames, including protocols to calculate multiple active topologies that can share learned station information, and support of a virtual local area network (VLAN) by multiple, per topology VLAN identifiers (VIDs). (Additional downloads for this standard are attached or can be downloaded at http://standards.ieee.org/downloads/802.1/index.html)

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std 802.1aq Front Cover
3	Title page
6	Introduction Notice to users Laws and regulations Copyrights Updating of IEEE documents
7	Errata Patents Participants
9	Contents
13	Figures
15	Tables
17	Important notice
18	1. Overview 1.3 Introduction
19	2. Normative references
20	3. Definitions
22	4. Abbreviations
23	5. Conformance 5.4 VLAN-aware Bridge component requirements 5.4.1 VLAN-aware Bridge component options
24	5.4.5 Shortest Path Bridging operation (optional) 5.5 C-VLAN component conformance
25	5.6 S-VLAN component conformance 5.6.1 S-VLAN component options
26	6. Support of the MAC Service 6.5 Quality of service maintenance 6.5.1 Service availability 6.5.3 Frame misordering 6.5.4 Frame duplication
28	6.9 Support of the EISS
29	6.9.1 Data indications
30	6.9.2 Data requests
31	7. Principles of network operation 7.1 Network overview 7.2 Use of VLANs
32	7.3 Active topology 7.4 7.3 VLAN topology
33	7.5 7.4 Locating end stations
35	7.6 7.5 Ingress, forwarding, and egress rules
37	8. Principles of bridge operation 8.1 Bridge operation 8.1.1 Relay
38	8.1.2 Filtering and relaying information 8.1.3 Duplicate frame prevention 8.2 Bridge architecture 8.3 Model of operation
39	8.4 Active topologies, learning, and forwarding
41	8.6 The Forwarding Process 8.6.1 Active topology enforcement
42	8.7 The Learning Process
43	8.7.3 Ageing of Dynamic Filtering Entries 8.8 The Filtering Database
44	8.8.1 Static Filtering Entries
45	8.8.2 Static VLAN Registration Entries 8.8.3 Dynamic Filtering Entries
46	8.8.4 MAC Address Registration Entries
47	8.8.8 Allocation of VIDs to FIDs
49	8.9 MST, SPB, and ESP configuration information
50	8.9.1 MST Configuration Table 8.9.2 MST configuration identification 8.9.3 FID to MSTID Allocation Table
51	8.9.4 SPT Configuration Identification 8.10 Spanning Tree Protocol Entity
52	8.13 Addressing 8.13.3 Use of LLC by Spanning Tree Protocol Entities 8.13.5 Group MAC Addresses for spanning tree protocolsentity
54	8.13.9 Points of attachment and connectivity for Higher Layer Entities
55	9. Tagged frame format 9.7 Backbone Service Instance Tag Control Information
56	12. Bridge management 12.1 Management functions 12.1.1 Configuration management 12.2 VLAN-aware bridge objects 12.3 Data Types 12.7 Filtering Database 12.7.7 General Filtering Database operations 12.10 Bridge VLAN managed objects 12.10.1 Bridge VLAN Configuration managed object
59	12.10.3 The VLAN Learning Constraints managed object 12.12 MST configuration entities 12.12.1 The MSTI List 12.12.3 The MST Configuration Table
60	12.13 Provider Bridge management 12.25 Shortest Path Bridging managed objects 12.25.1 The SPB System managed object
63	12.25.2 The SPB MTID Static managed object
65	12.25.3 The SPB Topology Instance Dynamic managed object 12.25.4 The SPB ECT Static Entry managed object
67	12.25.5 The SPB ECT Dynamic Entry managed object 12.25.6 The SPB Adjacency Static Entry managed object
68	12.25.7 The SPB Adjacency Dynamic Entry managed object
69	12.25.8 The SPB Topology Node Table managed object
70	12.25.9 The SPB Topology ECT Table managed object
71	12.25.10 The SPB Topology Edge Table managed object 12.25.11 The SPBM Topology Service Table managed object
73	12.25.12 The SPBV Topology Service Table managed object
74	13. Spanning Tree Protocols
75	13.1 Protocol design requirements
76	13.2 Protocol support requirements 13.2.1 MSTP support requirements
77	13.2.2 SPB support requirements 13.3 Protocol design goals 13.4 RSTP overview
78	13.4.1 Computation of the active topology
80	13.4.2 Example topologies
83	13.5 MSTP overview
84	13.5.1 Example topologies
87	13.5.2 Relationship of MSTP to RSTP 13.5.3 Modeling an MST or SPT Region as a single bridge
88	13.6 SPB overview
89	13.7 13.6 Compatibility and interoperability 13.7.1 13.6.1 Designated Port selection 13.7.2 13.6.2 Force Protocol Version
90	13.8 13.7 MST Configuration Identifier
91	13.9 13.8 Spanning Tree Priority Vectors
93	13.10 13.9 CIST Priority Vector calculations
95	13.11 13.10 MST Priority Vector calculations
97	13.12 13.11 Port Role assignments
98	13.13 13.12 Stable connectivity
99	13.14 13.13 Communicating Spanning Tree information
100	13.15 13.14 Changing Spanning Tree information
101	13.16 13.15 Changing Port States with RSTP or MSTP
102	13.16.1 13.15.1 Subtree connectivity and priority vectors 13.16.2 13.15.2 Root Port transition to Forwarding 13.16.3 13.15.3 Designated Port transition to Forwarding
103	13.16.4 13.15.4 Master Port transition to Forwarding
106	13.17 Changing Port States with SPB
108	13.17.1 Agreement Digest
109	13.18 13.16 Managing spanning tree topologies
110	13.19 13.17 Updating learned station location information
112	13.20 13.18 Managing reconfiguration
113	13.21 13.19 Partial and disputed connectivity 13.22 13.20 In-service upgrades
114	13.23 13.21 Fragile bridges
115	13.24 13.22 Spanning tree protocol state machines
117	13.25 13.23 State machine timers
118	13.25.1 13.23.1 edgeDelayWhile 13.25.2 13.23.2 fdWhile 13.25.3 13.23.3 helloWhen 13.25.4 13.23.4 mdelayWhile 13.25.5 13.23.5 rbWhile 13.25.6 13.23.6 rcvdInfoWhile
119	13.25.7 13.23.7 rrWhile 13.25.8 13.23.8 tcDetected 13.25.9 13.23.9 tcWhile 13.25.10 13.23.10 pseudoInfoHelloWhen 13.26 13.24 Per bridge variables
120	13.26.1 agreementDigest 13.26.2 13.24.1 BridgeIdentifier 13.26.3 13.24.2 BridgePriority 13.26.4 13.24.3 BridgeTimes
121	13.26.5 13.24.4 ForceProtocolVersion 13.26.6 13.24.5 MigrateTime 13.26.7 13.24.6 MstConfigId 13.26.8 AuxMstConfigId 13.26.9 13.24.7 rootPortId 13.26.10 13.24.8 rootPriority 13.26.11 13.24.9 rootTimes 13.26.12 13.24.10 TxHoldCount 13.27 13.25 Per port variables
124	13.27.1 13.25.1 AdminEdge 13.27.2 13.25.2 ageingTime 13.27.3 13.25.3 agree 13.27.4 13.25.4 agreed 13.27.5 agreedAbove 13.27.6 agreedDigest 13.27.7 agreedDigestValid 13.27.8 agreeDigest 13.27.9 agreeDigestValid
125	13.27.10 agreedMisorder 13.27.11 agreedN 13.27.12 agreedND 13.27.13 agreedPriority 13.27.14 agreedTopology 13.27.15 agreementOutstanding 13.27.16 agreeN 13.27.17 agreeND 13.27.18 13.25.5 AutoEdge
126	13.27.19 13.25.6 AutoIsolate 13.27.20 13.25.7 designatedPriority 13.27.21 13.25.8 designatedTimes 13.27.22 13.25.9 disputed 13.27.23 13.25.10 enableBPDUrx 13.27.24 13.25.11 enableBPDUtx 13.27.25 13.25.12 ExternalPortPathCost 13.27.26 13.25.19 isL2gp
127	13.27.27 13.25.20 isolate 13.27.28 13.25.13 fdbFlush 13.27.29 13.25.14 forward 13.27.30 13.25.15 forwarding 13.27.31 13.25.16 infoInternal 13.27.32 13.25.17 infoIs
128	13.27.33 13.25.18 InternalPortPathCost 13.27.34 13.25.21 learn 13.27.35 13.25.22 learning 13.27.36 13.25.23 master 13.27.37 13.25.24 mastered 13.27.38 13.25.25 mcheck 13.27.39 13.25.26 msgPriority
129	13.27.40 13.25.27 msgTimes 13.27.41 neighbourPriority 13.27.42 13.25.28 newInfo 13.27.43 13.25.29 newInfoMsti 13.27.44 13.25.30 operEdge 13.27.45 13.25.31 portEnabled 13.27.46 13.25.32 portId
130	13.27.47 13.25.33 portPriority 13.27.48 13.25.34 portTimes 13.27.49 13.25.35 proposed 13.27.50 13.25.36 proposing 13.27.51 13.25.37 pseudoRootId 13.27.52 13.25.38 rcvdBPDU 13.27.53 13.25.39 rcvdInfo 13.27.54 13.25.40 rcvdInternal 13.27.55 13.25.41 rcvdMsg 13.27.56 13.25.42 rcvdRSTP
131	13.27.57 13.25.43 rcvdSTP 13.27.58 13.25.44 rcvdTc 13.27.59 13.25.45 rcvdTcAck 13.27.60 13.25.46 rcvdTcn 13.27.61 13.25.47 reRoot 13.27.62 13.25.48 reselect 13.27.63 restrictedDomainRole 13.27.64 13.25.49 restrictedRole 13.27.65 13.25.50 restrictedTcn 13.27.66 13.25.51 role
132	13.27.67 13.25.52 selected 13.27.68 13.25.53 selectedRole 13.27.69 13.25.54 sendRSTP 13.27.70 13.25.55 sync 13.27.71 13.25.56 synced 13.27.72 13.25.57 tcAck 13.27.73 13.25.58 tcProp 13.27.74 13.25.59 tick 13.27.75 13.25.60 txCount 13.27.76 13.25.61 updtInfo
133	13.28 13.26 State machine conditions and parameters 13.28.1 allSptAgree 13.28.2 13.26.1 allSynced 13.28.3 13.26.2 allTransmitReady
134	13.28.4 BestAgreementPriority 13.28.5 13.26.3 cist 13.28.6 13.26.4 cistRootPort 13.28.7 13.26.5 cistDesignatedPort 13.28.8 13.26.6 EdgeDelay 13.28.9 13.26.7 forwardDelay 13.28.10 13.26.8 FwdDelay 13.28.11 13.26.9 HelloTime 13.28.12 13.26.11 MaxAge 13.28.13 13.26.10 msti 13.28.14 13.26.12 mstiDesignatedOrTCpropagatingRootPort 13.28.15 13.26.13 mstiMasterPort
135	13.28.16 13.26.14 operPointToPoint 13.28.17 13.26.15 rcvdAnyMsg 13.28.18 13.26.16 rcvdCistMsg 13.28.19 13.26.17 rcvdMstiMsg 13.28.20 13.26.18 reRooted 13.28.21 13.26.19 rstpVersion 13.28.22 spt 13.28.23 13.26.20 stpVersion 13.28.24 13.26.21 updtCistInfo 13.28.25 13.26.22 updtMstiInfo 13.29 13.27 State machine procedures
136	13.29.1 13.27.1 betterorsameInfo(newInfoIs)
137	13.29.2 13.27.2 clearAllRcvdMsgs() 13.29.3 13.27.3 clearReselectTree() 13.29.4 13.27.4 disableForwarding() 13.29.5 13.27.5 disableLearning() 13.29.6 13.27.6 enableForwarding() 13.29.7 13.27.7 enableLearning() 13.29.8 13.27.8 fromSameRegion() 13.29.9 13.27.9 newTcDetected()
138	13.29.10 13.27.10 newTcWhile() 13.29.11 13.27.11 pseudoRcvMsgs() 13.29.12 13.27.12 rcvInfo()
139	13.29.13 13.27.13 rcvMsgs() 13.29.14 rcvAgreements() 13.29.15 13.27.14 recordAgreement()
140	13.29.16 13.27.15 recordDispute() 13.29.17 13.27.16 recordMastered() 13.29.18 13.27.17 recordPriority() 13.29.19 13.27.18 recordProposal()
141	13.29.20 13.27.19 recordTimes() 13.29.21 13.27.20setReRootTree() 13.29.22 13.27.21 setSelectedTree() 13.29.23 13.27.22 setSyncTree() 13.29.24 13.27.23 setTcFlags() 13.29.25 13.27.24 setTcPropTree() 13.29.26 13.27.25 syncMaster() 13.29.27 13.27.26 txConfig()
142	13.29.28 13.27.27 txRstp() 13.29.29 13.27.28 txTcn() 13.29.30 updtAgreement()
143	13.29.31 13.27.29 updtBPDUVersion() 13.29.32 updtDigest()
144	13.29.33 13.27.30 updtRcvdInfoWhile()
145	13.29.34 13.27.31 updtRolesTree()
146	13.29.35 13.27.32 uptRolesDisabledTree()
147	13.30 13.28 The Port Timers state machine 13.31 13.29 Port Receive state machine
148	13.32 13.30 Port Protocol Migration state machine 13.33 13.31 Bridge Detection state machine
149	13.34 13.32 Port Transmit state machine
150	13.35 13.33 Port Information state machine
151	13.36 13.34 Port Role Selection state machine 13.37 13.35 Port Role Transitions state machine
155	13.38 13.36 Port State Transition state machine 13.38.1 13.36.1 Port State transitions for the CIST and MSTIs 13.38.2 Port State transitions for SPTs
157	13.39 13.37 Topology Change state machine
158	13.40 13.38 Layer 2 Gateway Port Receive state machine 13.41 13.39 Customer Edge Port Spanning Tree operation 13.41.1 13.39.1 Provider Edge Port operPointToPointMAC and operEdge
159	13.41.2 13.39.2 updtRolesTree() 13.41.3 13.39.3 setReRootTree(), setSyncTree(), setTcPropTree() 13.41.4 13.39.4 allSynced, reRooted 13.41.5 13.39.5 Configuration parameters
160	13.42 13.40 Virtual Instance Port Spanning Tree operation
161	14. Encoding of Bridge Protocol Data Units (BPDUs)Use of BPDUs by MSTP 14.1 BPDU Structure 14.1.1 Transmission and representation of octets
163	14.1.2 Common BPDU fields Components 14.2 Encoding of parameter types 14.2.1 Encoding of Port Role valuesProtocol Identifiers
164	14.2.2 Allocation and encoding of Bridge IdentifiersEncoding of Protocol Version Identifiers 14.2.3 Allocation and encoding of Port IdentifiersEncoding of BPDU types 14.2.4 Encoding of External Root Path Costflags 14.2.5 Encoding of Internal Root Path CostBridge Identifiers
165	14.2.6 Encoding of Hop CountsExternal Root Path Cost and Internal Root Path Cost 14.2.7 Encoding of Port Identifiers
166	14.2.8 Encoding of Timer Values 14.2.9 Encoding of Port Role values 14.2.10 Encoding of Length Values 14.2.11 Encoding of Hop Counts
167	14.3 14.5 Transmission of BPDUs 14.4 14.6 Encoding and decoding of STP Configuration, RST, and MST, and SPT BPDUs
169	14.4.1 14.6.1MSTI Configuration Messages
170	14.5 14.4 Validation of received BPDUs
171	14.6 Validation and interoperability
173	17. Management Information Base (MIB) 17.2 Structure of the MIB 17.2.4 Structure of the IEEE8021-Q-BRIDGE-MIB
174	17.2.5 Structure of the IEEE8021-PB MIB 17.2.6 Structure of the IEEE8021-MSTP MIB
175	17.2.19 Structure of the IEEE8021-SPB-MIB
178	17.3 Relationship to other MIBs 17.3.5 Relationship of the IEEE8021-PB-BRIDGE MIB to other MIB modules 17.3.19 Relationship of the of the IEEE8021-SPB-MIB to other MIB modules 17.4 Security considerations 17.4.19 Security considerations of the IEEE8021-SPB MIB
179	17.7 MIB modules 17.7.4 Definitions for the IEEE8021-Q-BRIDGE MIB module
219	17.7.5 Definitions for the IEEE8021-PB MIB module
234	17.7.6 Definitions for the IEEE8021-MSTP MIB module
259	17.7.19 SPB MIB module
289	20. Connectivity Fault Management protocols 20.2.2 Loopback Message reception and Loopback Reply transmission 20.28.2 xmitLBR()
291	27. Shortest Path Bridging (SPB)
293	27.1 Protocol design requirements
294	27.2 Protocol support 27.3 Protocol design goals
295	27.4 ISIS-SPB VLAN configuration
296	27.4.1 SPT Region and ISIS-SPB adjacency determination
298	27.5 ISIS-SPB information 27.6 Calculating CIST connectivity
299	27.7 Connectivity between regions in the same domain
300	27.8 Calculating SPT connectivity 27.8.1 ISIS-SPB overload
301	27.9 Loop prevention 27.10 SPVID and SPSourceID allocation
303	27.11 Allocation of VIDs to FIDs 27.12 SPBV SPVID translation
304	27.13 VLAN topology management
305	27.14 Individual addresses and SPBM 27.14.1 Loop mitigation
306	27.14.2 Loop prevention 27.15 SPBM group addressing
307	27.16 Backbone service instance topology management
308	27.17 Equal cost shortest paths, ECTs, and load spreading 27.18 Using SPBV and SPBM 27.18.1 Shortest Path Bridging—VID
310	27.18.2 Shortest Path Bridging—MAC
312	27.19 Security considerations
313	28. ISIS-SPB Link State Protocol 28.1 ISIS-SPB control plane MAC
314	28.2 Formation and maintenance of ISIS-SPB adjacencies
315	28.3 Loop prevention 28.4 The Agreement Digest
316	28.4.1 Agreement Digest Format Identifier 28.4.2 Agreement Digest Format Capabilities 28.4.3 Agreement Digest Convention Identifier 28.4.4 Agreement Digest Convention Capabilities
317	28.4.5 Agreement Digest Edge Count 28.4.6 The Computed Topology Digest
318	28.5 Symmetric shortest path tie breaking
319	28.6 Symmetric ECT framework
320	28.7 Symmetric ECT
321	28.8 Predefined ECT Algorithm details
322	28.9 ECT Migration 28.9.1 Use of a new ECT Algorithm in SPBV
323	28.9.2 Use of a new ECT Algorithm in SPBM 28.10 MAC Address registration
324	28.11 Circuit IDs and Port Identifiers 28.12 ISIS-SPB TLVs
325	28.12.1 MT-Capability TLV 28.12.2 SPB MCID sub-TLV
326	28.12.3 SPB Digest sub-TLV 28.12.4 SPB Base VLAN-Identifiers sub-TLV
328	28.12.5 SPB Instance sub-TLV
329	28.12.6 SPB Instance Opaque ECT Algorithm sub-TLV
330	28.12.7 SPB Link Metric sub-TLV
331	28.12.8 SPB Adjacency Opaque ECT Algorithm sub-TLV 28.12.9 SPBV MAC address sub-TLV
333	28.12.10 SPBM Service Identifier and Unicast Address (ISID-ADDR) sub-TLV
335	Annex A (normative) PICS proforma—Bridge implementations
337	Annex F (informative) Shared and Independent VLAN Learning
340	Annex M (informative) Bibliography

Additional information

Standard Title	IEEE Standard for Local and metropolitan area networks–Media Access Control (MAC) Bridges and Virtual Bridged Local Area Networks–Amendment 20: Shortest Path Bridging
Published Code	IEEE
Publication Date	2012

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