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Signamax 065-7840 24-Port 10/100/1000BaseT/TX Managed Switch
22
Class D and E:
Class D is a class with the first 4 MSB (Most significant bits) set to 1-1-1-0
and is used for IP Multicast. See also RFC 1112. Class E is a class with the first 4
MSB set to 1-1-1-1 and is used for IP broadcast.
According to IANA (Internet Assigned Numbers Authority), there are three
specific IP address blocks reserved and able to be used for extending internal
network. We call it Private IP address and list below:
Class A 10.0.0.0 --- 10.255.255.255
Class B 172.16.0.0 --- 172.31.255.255
Class C 192.168.0.0 --- 192.168.255.255
Please refer to RFC 1597 and RFC 1466 for more information.
Subnet mask:
The Subnet mask is the sub-division of a class-based network or a CIDR
block. The subnet is used to determine how to split an IP address to the network
prefix and the host address on a bitwise basis. It is designed to utilize IP addresses
more efficiently and provide an easier to manage IP network.
For a class B network, 128.1.2.3, it may have a subnet mask 255.255.0.0 in
default, in which the first two bytes contain all 1’s. This means more than 60
thousand nodes in a flat IP address can reside on the same network. It’s too large
to manage practically. Now, if we divide it into smaller networks by extending the
network prefix from 16 bits to, say, 24 bits, that’s using its third byte to subnet this
class B network. Now it has a subnet mask 255.255.255.0, in which each bit of the
first three bytes is 1. It’s now clear that the first two bytes is used to identify the
class B network, the third byte is used to identify the subnet within this class B
network and, of course, the last byte is the host number.
Not all IP addresses are available in the sub-netted network. Two special
addresses are reserved. They are the addresses with all zero’s and all one’s, plus
the host number. For example, for an IP address of 128.1.2.128, what will the IP
addresses reserved look like? All 0’s mean the network itself, and all 1’s mean IP
broadcast.
10000000.00000001.00000010.1 0000000
128.1.2.128/25
25 bits
1 0000000
1 1111111
All 0s = 128.1.2.128
All 1s= 128.1.2.255
Subne
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- U s e r ’ s G u i d e 1
- Table of Contents 5
- Revision History 8
- About this user’s manual 11
- 1. Introduction 12
- Key Features 13
- 1-2. Checklist 14
- 1-3. Features 14
- 2. Installation 20
- 2-1-2. Cabling Requirements 21
- RS-232 27
- Table 2-3 28
- Ethernet LAN 29
- 2-1-4. IP Address Assignment 30
- 1 0000000 32
- 1 1111111 32
- Fig. 2-11 34
- 2-2. Typical Applications 35
- 3. Operation of 37
- Web-based Management 37
- Page Layout Information 39
- 3-1-1. System Information 41
- 3-1-2. IP Configuration 43
- 3-1-3. Time Configuration 46
- Fig. 3-5 48
- 3-1-4. Account Configuration 49
- 3-2. Port Configuration 50
- Fig. 3-8 53
- 3-2-2. Port Configuration 55
- 3-2-3. Simple Counter 57
- 3-2-4. Detail Counter 59
- ) beside 62
- 3-4. Bandwidth Management 63
- Fig. 3-14 65
- Fig. 3-15 66
- Fig. 3-16 67
- Fig. 3-17 69
- Fig. 3-18 Advanced Mode 73
- Fig. 3-19 Simple Mode 73
- Fig. 3-20 74
- 3-6. SNMP Configuration 75
- 3-7. IGMP Snooping 77
- 3-8. Max. Packet Length 79
- 3-9. DHCP Boot 80
- 3-10. VLAN 81
- Fig. 3-25 82
- Fig. 3-26 83
- 3-10-2. Tag-based Group 84
- Fig. 3-28 85
- Fig. 3-29 85
- 3-10-3. Port-based Group 86
- Fig. 3-31 87
- Fig. 3-32 87
- 3-10-4. Tag Rule 88
- Fig. 3-33 89
- 3-11. MAC Table 90
- Fig. 3-34 91
- Fig. 3-35 92
- Fig. 3-36 93
- Fig. 3-37 94
- 3-12. GVRP Configuration 97
- Fig. 3-40 100
- Fig. 3-41 102
- 3-13. STP Configuration 103
- Fig. 3-42 104
- 3-13-2. STP Configuration 105
- Fig. 3-43 106
- Fig. 3-44 109
- 3-14. Trunking Configuration 110
- 113
- Fig.3-45 113
- Fig.3-46 114
- 3-15. 802.1x Configuration 117
- MAC Enable 118
- Port Authorize 118
- Fig. 3-50 119
- Table 3-3 121
- Fig. 3-52 122
- Disable 123
- 802.1x with Multi-host 123
- Fig. 3-54 124
- ForceUnauthorized: 125
- ForceAuthorized: 125
- Fig. 3-55 126
- 3-16. Alarm Configuration 127
- Fig. 3-56 128
- Fig. 3-57 129
- 3-17. Configuration 130
- 3-17-1. Save/Restore 131
- Fig. 3-61 132
- Fig. 3-62 132
- 3-17-2. Config File 133
- 3-18. Diagnostics 134
- Fig. 3-65 135
- Fig. 3-66 136
- 3-19. TFTP Server 137
- 3-20. Log 138
- 3-21. Firmware Upgrade 140
- 3-22. Reboot 141
- 3-23. Logout 142
- 4. Operation of CLI 143
- Management 143
- 065-7840 144
- 065-7840# 144
- 4-2. CLI Commands 145
- 4-2-1. CLI Global Commands 146
- 4-2-2. CLI Local Commands 152
- system 152
- Argument: 157
- account 158
- mirror 164
- bandwidth 166
- Example: 174
- max-pkt-len 175
- dhcp-boot 177
- mac-table 184
- trunk 197
- 802.1x 201
- alarm 208
- firmware 217
- config-file 218
- hostname 221
- autologout 222
- reboot 222
- 5. Maintenance 223
- Appendix A 224
- Technical Specifications 224
- Hardware Specifications 225
- Appendix B 228
- Null Modem Cable 228
- Specifications 228
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