CDM-840 Remote Router MN-CDM840 / CD-CDM840
Table of Contents Revision 3
ix
APPENDIX D. VERSAFEC RETURN LINK ACM (ADAPTIVE CODING AND MODULATION)
OPTION .................................................................................................................... D–1
D.1 Functional Overview .......................................................................................................... D–1
D.1.1 Background ...............................................................................................................................D–2
D.2 VersaFEC ACM ................................................................................................................... D–3
D.2.1 VersaFEC ACM Latency .............................................................................................................D–4
D.3 CDM-840 VersaFEC ACM Operation .................................................................................... D–5
D.3.1 VersaFEC ACM Operation Using the HTTP Interfaces ..............................................................D–5
D.3.2 Troubleshooting........................................................................................................................D–8
D.3.3 Monitoring ACM Performance .................................................................................................D–8
D.3.4 ModCod Switch Points ..............................................................................................................D–8
D.4 ACM Congestion Control .................................................................................................... D–9
D.5 Notes and Recommendations ............................................................................................D–10
D.6 Summary of Specifications ................................................................................................D–11
APPENDIX E. BPM (BRIDGE POINT-TO-MULTIPOINT) OPERATION ............................. E–1
E.1 Functional Overview ........................................................................................................... E–1
E.1.1 BPM Terminology ..................................................................................................................... E–2
E.2 Supported Network Configurations ..................................................................................... E–3
E.2.1 Flat Network ............................................................................................................................. E–3
E.2.2 Flat Network with Routers ........................................................................................................ E–3
E.2.3 VLAN Trunking .......................................................................................................................... E–4
E.3 Packet Processing ............................................................................................................... E–4
E.3.1 Traffic Network / Ethernet Switch Behavior ............................................................................. E–4
E.3.2 Management Network ............................................................................................................. E–5
E.4 IEEE 802.1Q Support ........................................................................................................... E–6
E.4.1 VLAN Trunking .......................................................................................................................... E–6
E.4.2 Access Mode Support ............................................................................................................... E–6
E.4.3 Multiple VLAN Tagging Support................................................................................................ E–7
E.5 Multicast BPM Behavior ...................................................................................................... E–7
E.5.1 Multicast Management/Routed Behavior (No Change) ...........................................................
E–8
E.6 BPM and Group QoS with Outbound ACM/VCM .................................................................. E–8
E.7 Hub Network Configuration ................................................................................................ E–9
E.8 Compatible Features and Detailed Specifications ............................................................... E–13
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