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GS108T Smart Switch Software Administration Manual
Network Cabling C-5
v1.0, December 2007
If installing new cable, NETGEAR recommends using Category 5e cable, since it costs about the
same as Category 5 cable. If using the existing cable, be sure to have the cable plant tested by a
professional who can verify that it meets or exceeds either ANSI/EIA/TIA-568-A:1995 or ISO/
IEC 11801:1995 Category 5 specifications.
Length
The maximum distance limitation between two pieces of equipment is 100 m, as per the original
Ethernet specification. The end-to-end link is called the “channel.”
TSB-67 defines the basic link, which is the portion of the link that is part of the building
infrastructure. This excludes patch and equipment cords. The maximum basic link length is 295
feet (90 m).
Return Loss
Return loss measures the amount of reflected signal energy resulting from impedance changes in
the cabling link. The nature of 1000BASE-T renders this measurement very important; if too much
energy is reflected back onto the receiver, the device does not perform optimally.
Unlike 10BASE-T and 100BASE-TX, which use only two of the four pairs of wires within the
Category 5 cable, 1000BASE-T uses all four pairs of the twisted pair. Make sure all wires are
tested⎯this is important.
Factors that affect the return loss are:
• The number of transition points, as there is a connection through an RJ-45 to another
connector, a patch panel, or device at each transition point.
• Removing the jacket that surrounds the four pairs of twisted cable. NETGEAR strongly
recommends that, when RJ-45 connections are made, this is minimized to 1
1/4 inch (32 mm).
• Untwisting any pair of the twisted-pair cabling. It is important that any untwisting be
minimized to 3/8 inch (10 mm) for RJ-45 connections.
• Cabling or bundling of multiple Category 5 cables. This is regulated by
ANSI/EIA/TIA-568A-3. If not correctly implemented, this can adversely affect all cabling
settings.
Near End Cross Talk
Near End Cross Talk (NEXT) is a measure of the signal coupling from one wire to another, within
a cable assembly, or among cables within a bundle. NEXT measures the amount of cross-talk
disturbance energy that is detected at the near end of the link—the end where the transmitter is
- GS108T Smart Switch 1
- Software Administration 1
- Contents 5
- About This Manual 10
- About This Manual xi 11
- How to Use This Manual 12
- How to Print This Manual 12
- Revision History 13
- Chapter 1 15
- Switch Management Interface 16
- Network with a DHCP Server 17
- Network without a DHCP Server 18
- Figure 1-3 19
- Web Access 20
- Additional Utilities 21
- Password Change 22
- Firmware Upgrade 22
- Chapter 2 25
- Navigation Tabs 26
- Chapter 3 29
- Managing System Settings 29
- System Information 30
- IP Configuration 31
- 3-4 Managing System Settings 32
- Managing System Settings 3-5 33
- Figure 3-3 33
- SNMP V1/V2 34
- Basic—LLDP Configuration 35
- 3-8 Managing System Settings 36
- Figure 3-5 36
- Advanced—LLDP Configuration 37
- Advanced—LLDP Port Settings 37
- 3-10 Managing System Settings 38
- Advanced—Local Information 39
- 3-12 Managing System Settings 40
- Item Description 41
- PVID The Port VLAN ID 41
- 3-14 Managing System Settings 42
- Table 3-5. MED Set Details 42
- Managing System Settings 3-15 43
- Figure 3-9 43
- 3-16 Managing System Settings 44
- Chapter 4 45
- Configuring Switching 45
- Port Configuration 46
- Configuring Switching 4-3 47
- Basic—LAG Configuration 48
- Basic—LAG Membership 49
- Advanced—LAG Configuration 50
- Advanced—LAG Membership 50
- Advanced—LACP Configuration 51
- 4-8 Configuring Switching 52
- Figure 4-6 52
- Basic—VLAN Configuration 53
- 4-10 Configuring Switching 54
- Figure 4-7 54
- Configuring Switching 4-11 55
- Figure 4-8 55
- Advanced—VLAN Configuration 56
- Advanced—VLAN Membership 56
- Configuring Switching 4-13 57
- Figure 4-9 57
- Figure 4-10 57
- 4-14 Configuring Switching 58
- Figure 4-11 58
- Configuring Switching 4-15 59
- Figure 4-12 59
- Figure 4-13 60
- 4-16 Configuring Switching 60
- Basic—RSTP Configuration 61
- Advanced—RSTP Configuration 61
- Advanced—Port Configuration 62
- Configuring Switching 4-19 63
- Figure 4-16 63
- Multicast 64
- Configuring Switching 4-21 65
- Figure 4-17 65
- Static Multicasting 66
- Multicast Group Membership 67
- Switch Configuration 68
- Address Table 69
- Dynamic Address 70
- Configuring Switching 4-27 71
- 4-28 Configuring Switching 72
- Chapter 5 73
- Configuring QoS and Security 73
- Basic—Rate Limit 74
- Figure 5-2 75
- Figure 5-3 76
- Figure 5-4 77
- Using the Security Tab 78
- Management Security 78
- Figure 5-5 79
- Figure 5-6 80
- Authentication Type 81
- Port Authentication 82
- Figure 5-8 83
- Advanced—802.1x Configuration 85
- Advanced—Port Authentication 85
- Figure 5-10 86
- Traffic Control 88
- Port Security 90
- IP Access List 91
- Figure 5-13 92
- Trusted MAC 93
- Chapter 6 95
- Port Statistics 96
- Figure 6-2 98
- EAP Statistics 99
- 802.1x Accounting Statistics 101
- Mirroring 102
- Configuration 103
- Memory Logs 105
- Flash Logs 106
- Server Logs 107
- Statistics 109
- Using the Maintenance Tab 110
- Device Reboot 111
- Factory Default 112
- File Upload 113
- Download 114
- Figure 6-15 115
- Using the Help Tab 116
- Online Help 117
- Appendix A 119
- Smart Wizard N/A Enabled 122
- Statistics 31 (per port) N/A 122
- Appendix B 123
- IEEE 802.1Q VLANs 124
- Port-Based VLANs 125
- Appendix C 129
- Network Cabling 129
- Twisted Pair Cables 130
- Patch Panels and Cables 131
- C-4 Network Cabling 132
- Figure C-3 132
- Near End Cross Talk 133
- Patch Cables 134
- Conclusion 135
- C-8 Network Cabling 136
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