IEEE 802.1S : 2002

1. Overview
    1.1 Scope
    1.3 Relationship with ISO/IEC 15802-3IEEE Std 802.1D
2. References
3. Definitions
4. Abbreviations
5. Conformance
    5.1 Static conformance requirements
    5.2 Options
6. Support of the MAC Service in VLANs
    6.1 Support of the MAC service
    6.2 Preservation of the MAC service
    6.3 Quality of service maintenance
    6.4 Enhanced Internal Sublayer Service provided within
          VLAN Bridges
    6.5 Support of the Internal Sublayer Service by
          IEEE Std 802.3 (CSMA/CD)
7. Principles of network operation
    7.1 Network Overview
    7.2 Use of VLANs
    7.3 VLAN Topology
    7.4 Locating end stations
    7.5 Ingress, Forwarding, and Egress Rules
8. Principles of bridge operation
    8.1 Bridge operation
    8.2 Bridge architecture
    8.3 Model of operation
    8.4 Port states and parameters
    8.5 Frame reception
    8.6 The Forwarding Process
    8.7 Frame transmission
    8.8 The Learning Process
    8.9 VLAN classification
    8.10 The Filtering Database
    8.11 MST configuration information
    8.12 Spanning Tree Protocol Entity and GARP Protocol
          Entities
    8.13 Bridge Management
    8.14 Addressing
10. Use of GMRP in VLANs
    10.1 Definition of a VLAN context
11. VLAN topology management
    11.2 GARP VLAN Registration Protocol (GVRP)
    11.3 Conformance to GVRP
12. VLAN bridge management
    12.1 Management functions
    12.2 Managed objects
    12.3 Data types
    12.4 Bridge Management Entity
    12.5 MAC entities
    12.6 Forwarding process
    12.7 Filtering Database
    12.8 Bridge Protocol Entity
    12.9 GARP Entities
    12.10 Bridge VLAN managed objects
    12.11 GMRP entities
    12.12 MST configuration entities
13. The Multiple Spanning Tree Protocol (MSTP)
    13.1 Protocol Design Requirements
    13.2 Protocol Support Requirements
    13.3 MSTP Overview
    13.4 Relationship of MSTP to RSTP
    13.5 Modelling an MST Region as a single RSTP Bridge
    13.6 STP and RSTP compatibility
    13.7 MST Configuration Identification
    13.8 MST Regions
    13.9 Spanning Tree Priority Vectors
    13.10 CIST Priority Vector Calculations
    13.11 MST Priority Vector Calculations
    13.12 Port Role Assignments
    13.13 Stable Connectivity
    13.14 Communicating Spanning Tree Information
    13.15 Changing Spanning Tree Information
    13.16 Changing Port States
    13.17 Updating Learned Station Location Information
    13.18 MSTP and point-to-point links
    13.19 Multiple Spanning Tree State Machines
    13.20 Notational Conventions used in State Diagrams
    13.21 State Machine Timers
    13.22 State Machine Performance Parameters
    13.23 Per-Bridge Variables
    13.24 Per-Port Variables
    13.25 State Machine Conditions
    13.26 State Machine Procedures
    13.27 The Port Timers state machine
    13.28 Port Receive state machine
    13.29 Port Protocol Migration state machine
    13.30 Port Transmit state machine
    13.31 Port Information state machine
    13.32 Port Role Selection state machine
    13.33 Port Role Transitions state machine
    13.34 Port State Transition state machine
    13.35 Topology Change state machine
    13.36 Performance
14. Use of BPDUs by MSTP
    14.1 BPDU Structure
    14.2 Encoding of parameter types
    14.3 BPDU formats and parameters
    14.4 Validation of received BPDUs
    14.5 Transmission of BPDUs
    14.6 Encoding and decoding of STP Configuration, RST,
          and MST BPDUs
Annex A (normative) PICS proforma
Annex E (informative) Interoperability considerations
Annex G (informative) Differences between 802.1s and 802.1w
                      state machines

Covers the architecture, protocols, and algorithms specified in 802.1Q to allow data traffic belonging to different VLANs to be allocated to different spanning trees, while retaining interoperability with bridges conformant to that prior specification.