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Chapter 3 - Using the Command Line Interface (CLI) 3-35
Vipersat Configuration
Figure 3-40
STDMA Switch Delay prompt
Percent Allocation
This menu item appears for Hub modems only.
The Percent Allocation menu item allows adding a fixed percentage to the
channel bandwidth request to accommodate additional bandwidth requirements
which may occur after the switch is made from STDMA to SCPC mode.
Typically the default value (10%) will be sufficient, but if there may be a larger
bandwidth requirement after the switch, the percent allocation value can be
increased. In choosing a value for this allocation, future bandwidth require-
ments for the channel must be balanced against efficient bandwidth utilization.
To change this setting, enter E at the command prompt in the Auto Switching
screen to display the dialog shown in figure 3-41.
Figure 3-41
Percent Allocation prompt
SCPC Step Up Threshold
This menu item appears for the Remote modem only.
The SCPC Step Up Threshold establishes the percentage of bandwidth use
that will trigger a switch up from the present SCPC rate to a higher rate to
ensure that there is sufficient bandwidth available for current conditions.
Typically the default value will be optimum, but if a different threshold is
desired, an alternate value can be specified by entering U at the command
prompt in the Auto Switching screen to display the dialog shown in
figure 3-42. Note that this value must be greater than the value specified for the
SCPC Step Down Threshold.
- User Guide 1
- Vipersat CDM-570/570L 3
- Version 1.5.x 3
- COMTECH EF DATA 4
- Document Revision Status 5
- Table of Contents 7
- Network Addressing 8
- Automatic Switching 9
- Dynamic Power Control 9
- Network Migration 9
- Glossary 9
- L User Guide 10
- List of Figures 11
- Appendix A Figures 12
- Appendix B Figures 12
- Appendix C Figures 12
- Appendix D Figures 12
- List of Tables 13
- How to Use This Manual 15
- Conventions and References 16
- Chapter 1 - General 1-3 17
- Product Description 18
- Dynamic SCPC (dSCPC) 19
- New in this Release 20
- 1.5.4 Release 21
- Customer Support 23
- QUICK START CONFIGURATION 25
- Initial Configuration 26
- Network Role 27
- Parameters 27
- Figure 2-3 29
- Figure 2-4 29
- Set the IP Address 30
- Configure the Route Table 31
- Figure 2-8 34
- Common Screen Commands 38
- Menu Descriptions 39
- Feature Configuration 41
- Vipersat Management 42
- Vipersat STDMA 42
- Vipersat Auto Switching 42
- Vipersat File Streamer 43
- Vipersat Configuration 44
- STDMA Tx Rate 45
- Hub Type 46
- Group ID 48
- STDMA Power Hunt 49
- Burstmap Multicast IP 50
- Outbound IP 50
- Cycles Per Burst Map 51
- Slot Guardband 51
- Slot Preamble Length 52
- Slot Data Length 52
- Slot Cycle Length 53
- Slot Start in Cycle 53
- Set Remotes 53
- STDMA Statistics 60
- Show Hub Statistics 61
- Figure 3-34 63
- Auto Switching 64
- Current WAN Transmit Mode 64
- ToS Switch Detection 66
- QoS Switch Detection 67
- STDMA Slot Capacity 70
- STDMA Switch Delay 70
- Percent Allocation 71
- SCPC Step Up Threshold 71
- SCPC Step Down Threshold 72
- SCPC Step Delay 72
- SCPC Step Up Excess 73
- ToS Switching Parameters 74
- Time for Carrier Inhibit 74
- Hitless Switching Parameters 77
- SOTM Update 78
- Unit Role 79
- Expansion Unit 80
- Network ID 80
- Unit Name 81
- Receive Multicast Address 81
- Managing IP Address 82
- Primary Heart Beat 83
- Home State Revert 83
- DPC Enabled 85
- Calibrated Data Rate 85
- Nominal Power Level 86
- Max Power 86
- Min Power 86
- Target EbNo 87
- Target Range 87
- Speed Up EbNo 87
- Target DPC Address 88
- Set Home State Parameters 89
- Force Modem to Home State 91
- STDMA State 91
- Transmit Frequency 91
- Transmit Data Rate 91
- Transmit FEC Type 92
- Transmit Coding Rate 92
- Transmit Modulation Type 93
- Transmit Power Level 93
- Transmit Enable 93
- Receive Frequency 93
- Receive Data Rate 94
- Receive FEC Type 94
- Vipersat Summary 95
- Vipersat Migration 97
- UDP Port Base Address 97
- NETWORK ADDRESSING 99
- The OSI Reference Model 100
- Binary Math 102
- IP Addressing 104
- Private Network IP Addresses 106
- Subnet Mask 107
- Network Segments 108
- Example: 00-3f-bf-00-01-45 109
- AUTOMATIC SWITCHING 111
- Load Switching 113
- Load Switching Process 116
- Load Switching by a Remote 117
- Load Switch Example 118
- Application Switching 121
- B - Automatic Switching B-13 123
- Fail-Safe Operation 124
- Figure B-5 125
- Figure B-6 126
- DYNAMIC POWER CONTROL 127
- Description 129
- Adjustment for Data Rate 131
- DPC Scaling Function 132
- NETWORK MIGRATION 135
- Firmware Upgrade 137
- Migration Procedure 138
- Upgrade Router to v1.5.3 141
- Save and Reboot to Latest 143
- Completing Migration 150
- Remote units 151
- GLOSSARY 153
- Appendix E - Glossary E-3 155
- Appendix E - Glossary E-5 157
- Appendix E - Glossary E-7 159
- Appendix E - Glossary E-9 161
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