IEEE Std 802.12d-1997 (Supplement to IEEE Std 802.12-1995) -Description
Abstract: Revisions to the IEEE 802.12 Demand Priority Access Method allowing optional implementation of redundant links to facilitate automatic recovery of network connectivity in case of link or repeater failure anywhere in the network path are specified. Rules for connecting redundant links within a network are defined.
Keywords: demand priority access method, fault tolerance, local area networks, media access control, network interconnection, redundant link, repeater
Content
1. Revisions to IEEE Std 802.12-1995
1. Overview
1.2 Purpose
1.3 Document organization
3. Definitions
6. Introduction to the protocol
6.1 Network topology
6.1.5 Redundant links
6.8 Items for future study
10. Medium Access Control (MAC) frame format structure
10.6 Elements of the IEEE 802.12 training frame
10.6.2 Requested configuration field format
10.6.3 Allowed configuration field format
11. Medium Access Control (MAC) protocol
11.1 Scope
12. Repeater Medium Access Control (RMAC) protocol
12.1 Scope
12.1.1 Network topology restrictions
12.2 RMAC packet monitoring and network control overview
12.2.1 Port meta-states
12.5 State machine constants, variables, and types
12.5.2 Types
12.5.3 Global variables
12.9 Buffer Control and Address Lookup Logic (BCALL) state machine
12.9.7 Control of frame transmission
12.9.8 Local port training mode
13. Layer management functions and services
13.1 Introduction
13.1.2 Layer management model
13.1.3 Packages
13.2 Management facilities
13.2.2 Counter operation
13.2.4 Repeater management facilities
A.5 End-node PICS proforma
A.5.1 End-node: Major capabilities
A.5.2 Support for MAC functions
A.6 Repeater PICS proforma
A.6.1 Repeater: Major capabilities
A.6.2 Support for RMAC functions and addressing functions
C.1 Repeater GDMO specification
C.1.4 Port managed object class
C.1.5 Link managed object class
C.4 ASN.1 module for demand priority managed objects
D.3 D.3 Repeater object identifiers
E.1 Allowed topologies
E.2 Maximum topologies
E.3 4-UTP bundled cable restrictions
E.4 Network topology rules and recommendations for repeaters with redundant links
E.4.1 Recommendations for interconnecting non-redundant-link repeaters with redundant-link repeaters
E.5 Network topology recommendations for end nodes with redundant links
