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Prestige 660R-6xC Series User’s Guide
Appendix E Virtual Circuit Topology 266
Appendix E
Virtual Circuit Topology
ATM is a connection-oriented technology, meaning that it sets up virtual circuits over which
end systems communicate. The terminology for virtual circuits is as follows:
• Virtual Channel Logical connections between ATM switches
• Virtual Path A bundle of virtual channels
• Virtual CircuitA series of virtual paths between circuit end points
Figure 184 Virtual Circuit Topology
Think of a virtual path as a cable that contains a bundle of wires. The cable connects two
points and wires within the cable provide individual circuits between the two points. In an
ATM cell header, a VPI (Virtual Path Identifier) identifies a link formed by a virtual path; a
VCI (Virtual Channel Identifier) identifies a channel within a virtual path.
The VPI and VCI identify a virtual path, that is, termination points between ATM switches. A
series of virtual paths make up a virtual circuit.
Your ISP (Internet Service Provider) should supply you with VPI/VCI numbers.
- Prestige 660R-6xC Series 1
- Copyright 3
- Federal Communications 4
- Commission (FCC) Interference 4
- Statement 4
- ZyXEL Limited Warranty 5
- Customer Support 6
- Table of Contents 7
- Chapter 4 8
- Chapter 5 8
- Appendix F 16
- Appendix G 16
- List of Figures 17
- List of Tables 23
- About This User's Guide 27
- Syntax Conventions 27
- Related Documentation 27
- User Guide Feedback 28
- Graphics Icons Key 28
- Introduction to DSL 29
- 29 Introduction to DSL 30
- CHAPTER 1 31
- ADSL Standards 33
- Protocol Support 33
- Packet Filters 35
- Ease of Installation 35
- 1.1.2.1 Internet Access 35
- LED descriptions 36
- CHAPTER 2 37
- 2.1.2 Resetting the Prestige 38
- CHAPTER 3 41
- 3.1.2 Multiplexing 42
- 3.1.3 VPI and VCI 42
- Chapter 3 Wizard Setup 42 43
- 3.2.1 IP Address Assignment 44
- 3.2.3 NAT 45
- 45 Chapter 3 Wizard Setup 46
- Chapter 3 Wizard Setup 46 47
- 47 Chapter 3 Wizard Setup 48
- 3.2.5 DHCP Setup 49
- 49 Chapter 3 Wizard Setup 50
- Chapter 3 Wizard Setup 50 51
- 51 Chapter 3 Wizard Setup 52
- CHAPTER 4 53
- 53 Chapter 4 Password Setup 54
- CHAPTER 5 55
- 5.2 DNS Server Address 56
- 5.4 LAN TCP/IP 57
- 5.5 Configuring LAN 58
- Chapter 5 LAN Setup 58 59
- Figure 16 LAN Setup 59
- Table 10 LAN Setup 59
- 59 Chapter 5 LAN Setup 60
- CHAPTER 6 61
- 6.3 PPPoE Encapsulation 62
- 6.4 Traffic Shaping 62
- 6.5 Configuring WAN Setup 63
- 63 Chapter 6 WAN Setup 64
- Figure 18 WAN Setup (PPPoE) 64
- Table 11 WAN Setup 64
- Chapter 6 WAN Setup 64 65
- 6.6 Traffic Redirect 66
- 6.7 Configuring WAN Backup 67
- 67 Chapter 6 WAN Setup 68
- Figure 21 WAN Backup 68
- Table 12 WAN Backup 68
- Check WAN IP Address 69
- 69 Chapter 6 WAN Setup 70
- CHAPTER 7 71
- 7.1.2 What NAT Does 72
- 7.1.3 How NAT Works 72
- 7.1.4 NAT Application 73
- 7.1.5 NAT Mapping Types 73
- Table 14 NAT Mapping Types 74
- 7.3 SUA Server 75
- 7.4 Selecting the NAT Mode 76
- 7.5 Configuring SUA Server 77
- CHAPTER 8 83
- Figure 29 Dynamic DNS 84
- Table 20 Dynamic DNS 84
- CHAPTER 9 85
- 85 Chapter 9 Time and Date 86
- Table 21 Time and Date 86
- CHAPTER 10 87
- 10.2 Telnet 88
- 10.3 FTP 88
- 10.4 Web 88
- Figure 32 Remote Management 89
- Table 22 Remote Management 89
- CHAPTER 11 91
- 11.2 UPnP and ZyXEL 92
- Figure 43 System Tray Icon 100
- Network 101
- CHAPTER 12 105
- 105 Chapter 12 Maintenance 106
- Figure 48 System Status 106
- Table 24 System Status 106
- 12.2.1 System Statistics 107
- 12.3 DHCP Table Screen 108
- 12.4 Diagnostic Screens 109
- 109 Chapter 12 Maintenance 110
- 12.5 Firmware Screen 112
- Chapter 12 Maintenance 112 113
- Figure 55 Error Message 113
- 113 Chapter 12 Maintenance 114
- CHAPTER 13 115
- Prestige 116
- ? > or 117
- Table 31 SMT Main Menu 118
- Table 32 Main Menu Summary 118
- 1234", and 119
- CHAPTER 14 121
- CHAPTER 15 125
- CHAPTER 16 129
- CHAPTER 17 133
- 17.4 IP Alias Setup 134
- 17.5 Route IP Setup 135
- Menu 4 Internet Access Setup 137
- CHAPTER 18 139
- Press ENTER to Confirm 142
- 18.4 Remote Node Filter 145
- Figure 77 Internet Security 146
- 18.5.3 Advance Setup Options 149
- CHAPTER 19 151
- CHAPTER 20 155
- 155 Chapter 20 Bridging Setup 156
- 157 Chapter 20 Bridging Setup 158
- CHAPTER 21 159
- 21.3 NAT Setup 161
- 21.3.1.3 Ordering Your Rules 164
- 21.5 General NAT Examples 167
- Figure 104 NAT Example 2 168
- Figure 106 NAT Example 3 170
- Figure 111 NAT Example 4 172
- CHAPTER 22 175
- Filter Rule 176
- Filter Set 176
- 22.4.1 TCP/IP Filter Rule 179
- 22.4.2 Generic Filter Rule 182
- Length= 0 183
- 22.5 Filter Types and NAT 184
- 22.6 Example Filter 184
- 22.7.1 Ethernet Traffic 187
- 22.7.2 Remote Node Filters 187
- CHAPTER 23 189
- 23.2 Supported MIBs 190
- 23.3 SNMP Configuration 190
- 23.4 SNMP Traps 191
- CHAPTER 24 193
- 24.3 System Information 195
- 24.3.2 Console Port Speed 196
- 24.4 Log and Trace 197
- 24.4.2 Syslog and Accounting 198
- 24.5 Diagnostic 200
- CHAPTER 25 203
- 25.2 Backup Configuration 204
- 25.2.4 GUI-based FTP Clients 206
- 25.2.7 TFTP Command Example 207
- 25.3 Restore Configuration 208
- 25.4.1 Firmware File Upload 210
- 25.4.5 TFTP File Upload 212
- CHAPTER 26 215
- 26.2 Call Control Support 216
- 26.3 Time and Date Setting 217
- 26.3.1 Resetting the Time 219
- CHAPTER 27 221
- 27.4 System Timeout 223
- CHAPTER 28 225
- 28.4 IP Routing Policy Setup 226
- 28.5 Applying an IP Policy 229
- IP=0.0.0.0 232
- CHAPTER 29 235
- CHAPTER 30 239
- Appendix A 243
- Splitters and Microfilters 243
- Prestige With ISDN 244
- Appendix B 245
- Installing Components 246
- Configuring 247
- Windows 2000/NT/XP 248
- Macintosh OS 8/9 252
- Macintosh OS X 254
- Verifying Settings 255
- Appendix C 257
- IP Subnetting 257
- Subnet Masks 258
- Subnetting 258
- Example: Two Subnets 259
- 259 Appendix C IP Subnetting 260
- Table 86 Subnet 1 260
- Table 87 Subnet 2 260
- Example: Four Subnets 261
- Example Eight Subnets 262
- Appendix C IP Subnetting 262 263
- 263 Appendix C IP Subnetting 264
- Appendix D 265
- How PPPoE Works 266
- Prestige as a PPPoE Client 266
- Appendix E 267
- Virtual Circuit Topology 267
- 267 Appendix E 268
- Command Interpreter 269
- 269 Appendix F 270
- Log Descriptions 271
- Appendix G 272 273
- Table 100 PPP Logs 273
- Table 101 ICMP Notes 273
- 273 Appendix G 274
- Table 102 Syslog Logs 274
- Appendix G 274 275
- 275 Appendix G 276
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