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Prestige 660RU-Tx Series User’s Guide
263 Appendix C
Divide the network 192.168.1.0 into two separate subnets by converting one of the host ID bits
of the IP address to a network number bit. The “borrowed” host ID bit can be either “0” or “1”
thus giving two subnets; 192.168.1.0 with mask 255.255.255.128 and 192.168.1.128 with
mask 255.255.255.128.
The remaining 7 bits determine the number of hosts each subnet can have. Host IDs of all
zeros represent the subnet itself and host IDs of all ones are the broadcast address for that
subnet, so the actual number of hosts available on each subnet in the example above is 2
7
– 2
or 126 hosts for each subnet.
192.168.1.0 with mask 255.255.255.128 is the subnet itself, and 192.168.1.127 with mask
255.255.255.128 is the directed broadcast address for the first subnet. Therefore, the lowest IP
address that can be assigned to an actual host for the first subnet is 192.168.1.1 and the highest
is 192.168.1.126. Similarly the host ID range for the second subnet is 192.168.1.129 to
192.168.1.254.
Note: In the following charts, shaded/bolded last octet bit values indicate host
ID bits “borrowed” to form network ID bits. The number of “borrowed” host ID
bits determines the number of subnets you can have. The remaining number
of host ID bits (after “borrowing”) determines the number of hosts you can
have on each subnet.
Table 88 Subnet 1
NETWORK NUMBER
LAST OCTET BIT
VALUE
IP Address 192.168.1. 0
IP Address (Binary) 11000000.10101000.00000001. 00000000
Subnet Mask 255.255.255. 128
Subnet Mask (Binary) 11111111.11111111.11111111. 10000000
Subnet Address: 192.168.1.0 Lowest Host ID: 192.168.1.1
Broadcast Address:
192.168.1.127
Highest Host ID: 192.168.1.126
Table 89 Subnet 2
NETWORK NUMBER LAST OCTET BIT VALUE
IP Address 192.168.1. 128
IP Address (Binary) 11000000.10101000.00000001. 10000000
Subnet Mask 255.255.255. 128
Subnet Mask (Binary) 11111111.11111111.11111111. 10000000
Subnet Address:
192.168.1.128
Lowest Host ID: 192.168.1.129
Broadcast Address:
192.168.1.255
Highest Host ID: 192.168.1.254
- Prestige 660RU-Tx 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
- 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
- Protocol Support 34
- Networking Compatibility 34
- Multiplexing 34
- 1.1.2.1 Internet Access 36
- 1.1.4 Front Panel LEDs 37
- CHAPTER 2 39
- 2.1.2 Resetting the Prestige 40
- CHAPTER 3 43
- 3.1.2 Multiplexing 44
- 3.1.3 VPI and VCI 44
- Chapter 3 Wizard Setup 44 45
- 3.2.1 IP Address Assignment 46
- 3.2.3 NAT 47
- 47 Chapter 3 Wizard Setup 48
- Chapter 3 Wizard Setup 48 49
- 49 Chapter 3 Wizard Setup 50
- 3.2.5 DHCP Setup 51
- 51 Chapter 3 Wizard Setup 52
- Chapter 3 Wizard Setup 52 53
- 53 Chapter 3 Wizard Setup 54
- CHAPTER 4 55
- 55 Chapter 4 Password Setup 56
- CHAPTER 5 57
- 5.2 DNS Server Address 58
- 5.4 LAN TCP/IP 59
- 5.5 Any IP 60
- 5.5.1 How Any IP Works 61
- 5.6 Configuring LAN 62
- Chapter 5 LAN Setup 62 63
- 63 Chapter 5 LAN Setup 64
- CHAPTER 6 65
- 6.3 PPPoE Encapsulation 66
- 6.4 Traffic Shaping 66
- 6.6 Configuring WAN Setup 67
- 67 Chapter 6 WAN Setup 68
- Figure 19 WAN Setup (PPPoE) 68
- Table 12 WAN Setup 68
- Chapter 6 WAN Setup 68 69
- 6.7 Traffic Redirect 70
- 6.8 Configuring WAN Backup 71
- 71 Chapter 6 WAN Setup 72
- Figure 22 WAN Backup 72
- Table 13 WAN Backup 72
- Check WAN IP Address 73
- 73 Chapter 6 WAN Setup 74
- CHAPTER 7 75
- 7.1.2 What NAT Does 76
- 7.1.3 How NAT Works 76
- 7.1.4 NAT Application 77
- 7.1.5 NAT Mapping Types 77
- Table 15 NAT Mapping Types 78
- 7.3 SUA Server 79
- 7.4 Selecting the NAT Mode 80
- 7.5 Configuring SUA Server 81
- CHAPTER 8 87
- Figure 30 Dynamic DNS 88
- Table 21 Dynamic DNS 88
- CHAPTER 9 89
- 89 Chapter 9 Time and Date 90
- Table 22 Time and Date 90
- CHAPTER 10 91
- 10.2 Telnet 92
- 10.3 FTP 92
- 10.4 Web 92
- Figure 33 Remote Management 93
- Table 23 Remote Management 93
- CHAPTER 11 95
- 11.2 UPnP and ZyXEL 96
- Figure 44 System Tray Icon 104
- Network 105
- CHAPTER 12 109
- 109 Chapter 12 Maintenance 110
- Figure 49 System Status 110
- Table 25 System Status 110
- 12.2.1 System Statistics 111
- 12.3 DHCP Table Screen 112
- 12.4 Any IP Table Screen 113
- 12.5 Diagnostic Screens 114
- Chapter 12 Maintenance 114 115
- 12.6 Firmware Screen 117
- 117 Chapter 12 Maintenance 118
- Figure 57 Error Message 118
- CHAPTER 13 119
- Prestige 120
- ? > or 121
- Table 33 SMT Main Menu 122
- Table 34 Main Menu Summary 122
- 1234", and 123
- CHAPTER 14 125
- CHAPTER 15 129
- Press ENTER to Confirm 130
- CHAPTER 16 133
- CHAPTER 17 137
- 17.4 IP Alias Setup 138
- 17.5 Route IP Setup 139
- Menu 4 Internet Access Setup 141
- CHAPTER 18 143
- 18.4 Remote Node Filter 149
- Figure 79 Internet Security 150
- 18.5.3 Advance Setup Options 153
- CHAPTER 19 155
- CHAPTER 20 159
- 159 Chapter 20 Bridging Setup 160
- 161 Chapter 20 Bridging Setup 162
- CHAPTER 21 163
- 21.3 NAT Setup 165
- 21.3.1.3 Ordering Your Rules 168
- 21.5 General NAT Examples 171
- Figure 106 NAT Example 2 172
- Figure 108 NAT Example 3 174
- Figure 113 NAT Example 4 176
- CHAPTER 22 179
- Filter Rule 180
- Filter Set 180
- 22.4.1 TCP/IP Filter Rule 183
- 22.4.2 Generic Filter Rule 186
- Length= 0 187
- 22.5 Filter Types and NAT 188
- 22.6 Example Filter 188
- 22.7.1 Ethernet Traffic 191
- 22.7.2 Remote Node Filters 191
- CHAPTER 23 193
- 23.2 Supported MIBs 194
- 23.3 SNMP Configuration 194
- 23.4 SNMP Traps 195
- CHAPTER 24 197
- 24.3 System Information 199
- 24.3.2 Console Port Speed 200
- 24.4 Log and Trace 201
- 24.4.2 Syslog and Accounting 202
- 24.5 Diagnostic 204
- CHAPTER 25 207
- 25.2 Backup Configuration 208
- 25.2.4 GUI-based FTP Clients 210
- 25.2.7 TFTP Command Example 211
- 25.3 Restore Configuration 212
- 25.4.1 Firmware File Upload 214
- 25.4.5 TFTP File Upload 216
- CHAPTER 26 219
- 26.2 Call Control Support 220
- 26.3 Time and Date Setting 221
- 26.3.1 Resetting the Time 222
- CHAPTER 27 225
- 27.4 System Timeout 227
- CHAPTER 28 229
- 28.4 IP Routing Policy Setup 230
- 28.5 Applying an IP Policy 233
- IP=0.0.0.0 236
- CHAPTER 29 239
- CHAPTER 30 243
- Appendix A 247
- Splitters and Microfilters 247
- Prestige With ISDN 248
- Appendix B 249
- Installing Components 250
- Configuring 251
- Windows 2000/NT/XP 252
- Appendix B 252 253
- 253 Appendix B 254
- Appendix B 254 255
- Macintosh OS 8/9 256
- Appendix B 256 257
- Macintosh OS X 258
- Verifying Settings 259
- 259 Appendix B 260
- Appendix C 261
- IP Subnetting 261
- Subnet Masks 262
- Subnetting 262
- Example: Two Subnets 263
- 263 Appendix C 264
- Table 88 Subnet 1 264
- Table 89 Subnet 2 264
- Example: Four Subnets 265
- Example Eight Subnets 266
- Appendix C 266 267
- 267 Appendix C 268
- Appendix D 269
- How PPPoE Works 270
- Prestige as a PPPoE Client 270
- Appendix E 271
- Virtual Circuit Topology 271
- 271 Appendix E 272
- Appendix F 273
- Command Interpreter 273
- 273 Appendix F 274
- Appendix G 275
- Log Descriptions 275
- Appendix G 276 277
- Table 102 PPP Logs 277
- Table 103 ICMP Notes 277
- 277 Appendix G 278
- Table 104 Syslog Logs 278
- Appendix G 278 279
- 279 Appendix G 280
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