VSG-1200 User’s Guide
Appendix H IP Subnetting
269
Example: Four Subnets
The above example illustrated using a 25-bit subnet mask to divide a class “C” address space
into two subnets. Similarly to divide a class “C” address into four subnets, you need to
“borrow” two host ID bits to give four possible combinations of 00, 01, 10 and 11. The subnet
mask is 26 bits (11111111.11111111.11111111.
11
000000) or 255.255.255.192. Each subnet
contains 6 host ID bits, giving 2
6
-2 or 62 hosts for each subnet (all 0’s is the subnet itself, all
1’s is the broadcast address on the subnet).
Table 103
Subnet 1
NETWORK NUMBER
LAST OCTET BIT
VALUE
IP Address
192.168.1.
0
IP Address (Binary)
11000000.10101000.00000001.
00
000000
Subnet Mask (Binary)
11111111.11111111.11111111.
11
000000
Subnet Address: 192.168.1.0
Lowest Host ID: 192.168.1.1
Broadcast Address:
192.168.1.63
Highest Host ID: 192.168.1.62
Table 104
Subnet 2
NETWORK NUMBER
LAST OCTET BIT
VALUE
IP Address
192.168.1.
64
IP Address (Binary)
11000000.10101000.00000001.
01
000000
Subnet Mask (Binary)
11111111.11111111.11111111.
11
000000
Subnet Address: 192.168.1.64
Lowest Host ID: 192.168.1.65
Broadcast Address: 192.168.1.127
Highest Host ID: 192.168.1.126
Table 105
Subnet 3
NETWORK NUMBER
LAST OCTET BIT
VALUE
IP Address
192.168.1.
128
IP Address (Binary)
11000000.10101000.00000001.
10
000000
Subnet Mask (Binary)
11111111.11111111.11111111.
11
000000
Subnet Address:
192.168.1.128
Lowest Host ID: 192.168.1.129
Broadcast Address:
192.168.1.191
Highest Host ID: 192.168.1.190
Summary of Contents for VSG-1200
Page 1: ...VSG 1200 Vantage Service Gateway User s Guide Version 1 08 1 2006 ...
Page 8: ...VSG 1200 User s Guide 8 Customer Support ...
Page 22: ...VSG 1200 User s Guide 22 List of Figures ...
Page 26: ...VSG 1200 User s Guide 26 List of Tables ...
Page 40: ...VSG 1200 User s Guide 40 Chapter 2 Hardware Installation and Connection ...
Page 45: ...VSG 1200 User s Guide Chapter 3 The Web Configurator 45 Figure 13 System Setting System ...
Page 52: ...VSG 1200 User s Guide 52 Chapter 3 The Web Configurator ...
Page 64: ...VSG 1200 User s Guide 64 Chapter 4 LAN WAN and Server Setup ...
Page 74: ...VSG 1200 User s Guide 74 Chapter 6 Authentication Figure 29 System Setting Authentication ...
Page 102: ...VSG 1200 User s Guide 102 Chapter 9 Dynamic Subscriber Accounts ...
Page 128: ...VSG 1200 User s Guide 128 Chapter 13 Subscriber Information Window ...
Page 136: ...VSG 1200 User s Guide 136 Chapter 14 Account Printout ...
Page 140: ...VSG 1200 User s Guide 140 Chapter 15 User Agreement Page ...
Page 144: ...VSG 1200 User s Guide 144 Chapter 16 Bandwidth Management ...
Page 158: ...VSG 1200 User s Guide 158 Chapter 19 LAN Devices ...
Page 162: ...VSG 1200 User s Guide 162 Chapter 20 Static Route ...
Page 170: ...VSG 1200 User s Guide 170 Chapter 21 Syslog and Session Trace ...
Page 174: ...VSG 1200 User s Guide 174 Chapter 22 SNMP ...
Page 198: ...VSG 1200 User s Guide 198 Chapter 25 Secure Socket Layer ...
Page 206: ...VSG 1200 User s Guide 206 Chapter 26 The SMT ...
Page 214: ...VSG 1200 User s Guide 214 Chapter 27 LAN and WAN Setup Using the SMT ...
Page 226: ...VSG 1200 User s Guide 226 Chapter 28 Configuration and Firmware Maintenance ...
Page 236: ...VSG 1200 User s Guide 236 Appendix B IP Address Assignment Conflicts ...
Page 238: ...VSG 1200 User s Guide 238 Appendix C Subscriber Login ...
Page 242: ...VSG 1200 User s Guide 242 Appendix D Vendor Specific Attributes ...
Page 252: ...VSG 1200 User s Guide 252 Appendix F Cable Types and Cable Pin Assignments ...
Page 264: ...VSG 1200 User s Guide 264 Appendix G Setting up Your Computer s IP Address ...
Page 272: ...VSG 1200 User s Guide 272 Appendix H IP Subnetting ...