802.1ag-2007

dbywn

Figure 6-1—MAC entities, the MAC Service, and MAC Service users (clients)......................................... 14
Figure 6-2—An interface stack...................................................................................................................... 15
Figure 6-3—Two back-to-back EISS Multiplex Entities .............................................................................. 18
Figure 12-1—Relationships among CFM managed objects.......................................................................... 24
Figure 18-1—One Maintenance Domain: operator’s view ......................................................................... 119
Figure 18-2—One service instance: operator’s view................................................................................... 120
Figure 18-3—One service instance: customer’s view ................................................................................. 120
Figure 18-4—MEP and MIP Symbols......................................................................................................... 121
Figure 18-5—Maintenance Associations: one service instance in a provider network............................... 122
Figure 18-6—Maintenance Associations: Expansion of Figure 18-5.......................................................... 123
Figure 18-7—MEPs, MIPs, and MD Levels ............................................................................................... 124
Figure 19-1—CFM Protocol shims ............................................................................................................. 125
Figure 19-2—Maintenance association End Point (MEP)........................................................................... 128
Figure 19-3—MIP Half Function ................................................................................................................ 133
Figure 19-4—Linktrace Output Multiplexer shim....................................................................................... 135
Figure 19-5—Linktrace Output Multiplexer architecture............................................................................ 135
Figure 20-1—MEP state machines—overview and relationships ............................................................... 146
Figure 20-2—MEP Continuity Check Initiator state machine .................................................................... 152
Figure 20-3—MHF Continuity Check Receiver state machine................................................................... 153
Figure 20-4—MEP Continuity Check Receiver state machine ................................................................... 156
Figure 20-5—Remote MEP state machine .................................................................................................. 158
Figure 20-6—Remote MEP Error state machine......................................................................................... 159
Figure 20-7—MEP Cross Connect state machine ....................................................................................... 160
Figure 20-8—MP Loopback Responder state machine ............................................................................... 162
Figure 20-9—MEP Loopback Initiator transmit state machine................................................................... 164
Figure 20-10—MEP Loopback Initiator receive state machine .................................................................. 165
Figure 20-11—MEP Fault Notification Generator state machine ............................................................... 167
Figure 20-12—MEP Linktrace Initiator receive state machine................................................................... 171
Figure 20-13—Linktrace Responder, MEPs, MHFs, and LOMs ................................................................ 173
Figure 20-14—LTM Receiver state machine .............................................................................................. 178
Figure 20-15—LTR Transmitter state machine........................................................................................... 179
Figure 22-1—MEPs and MIPs distinguished by VID (incomplete picture)................................................ 208
Figure 22-2—Alternate view of Forwarding process .................................................................................. 209
Figure 22-3—Combining per-VLAN Maintenance Points into two shims ................................................. 210
Figure 22-4—More complete picture of Maintenance Point placement in a Bridge Port ........................... 211
Figure 22-5—Service instance spanning two Bridges protected by Up MPs.............................................. 213
Figure 22-6—Service instance spanning two Bridges protected by Down MPs......................................... 213
Figure 22-7—Maintenance Point placement in a non-VLAN aware Bridge Port....................................... 215
Figure 22-8—Maintenance Point placement relative to other standards..................................................... 216
Figure 22-9—Creating MEPs and MIPs...................................................................................................... 219
Figure 22-10—CFM in a Provider Edge Bridge C-tagged service interface............................................... 225
Figure 22-11—Up MEPs in a Management Port......................................................................................... 226
Figure 22-12—CFM in the enterprise environment .................................................................................... 227
Figure 22-13—CFM on a Bridge conformant to IEEE Std 802.1Q-2005................................................... 228
Figure J.1—Up MPs in a CFM Port ............................................................................................................ 244