3com 3800 Manuel d'utilisateur Page 79
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- Table des matières
- DEPANNAGE
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
5
VIRTUAL LANS (VLANS)
Setting up Virtual Local Area Networks (VLANs) on the Switch 3800
eases many time-consuming tasks of network administration while
increasing efficiency in network operations.
This chapter describes the VLAN concepts and explains how to
implement VLANs on the Switch 3800.
Overview of Virtual
LANs
A VLAN is a group of location- and topology-independent devices, for
example a group of users (workstations) and the server to which they
connect, that communicate as if they are on the same physical LAN.
This means that LAN segments are not restricted by the hardware that
physically connects them. The segments are defined by flexible user
groups that you create with the command-line interface.
Benefits Implementing VLANs on your networks has the following advantages:
■ It eases the change and movement of devices.
With traditional networks, network administrators spend much of
their time dealing with moves and changes. If users move to a
different subnetwork, the addresses of each endstation must be
updated manually.
For example, with a VLAN, if an endstation in VLAN Marketing is
moved to a port in another part of the network, and retains its
original subnet membership, you only need to specify that the new
port is in VLAN Marketing.
SW3800.BK Page 1 Tuesday, May 5, 1998 5:20 PM
- VCCI Statement 3
- Information To The User 3
- ECHNICAL 11
- PECIFICATIONS 11
- ROUBLESHOOTING 11
- ■ Local Area Networks (LANs) 13
- ■ Ethernet concepts 13
- ■ IP Routing 13
- Finding 14
- Information in This 14
- Table 1 Notice Icons 15
- Table 2 Text Conventions 15
- Command Syntax 16
- Line-Editing 17
- Related 17
- Publications 17
- 6 ABOUT THIS GUIDE 18
- SWITCH 3800 OVERVIEW 19
- Dual-homed 21
- Network 23
- Switch 3800 Front 25
- Table 1-2 Switch 3800 LEDs 26
- Switch 3800 Rear 27
- INSTALLATION AND SETUP 29
- Installing the 30
- Switch 3800 30
- Connecting 32
- Equipment to the 32
- Console Port 32
- Cable connector: 9-pin female 33
- ACCESSING THE SWITCH 37
- Table 3-1 Default Accounts 38
- Methods of 40
- Managing the 40
- Using Telnet 3-5 41
- Table 3-2 Supported MIBs 45
- Table 3-3 Supported Traps 45
- Checking Basic 48
- Connectivity 48
- ■ Configuring autonegotiation 49
- Load Sharing 3-15 51
- Table 3-8 Port Commands 53
- COMMANDS 55
- 4-2 CHAPTER 4: COMMANDS 56
- Command History 59
- Substitution 59
- General Switch 61
- User Account 62
- Switch Management 63
- Table 4-7 VLAN Commands 64
- Table 4-8 Protocol Commands 65
- Table 4-9 FDB Commands 65
- Table 4-10 Port Commands 66
- Table 4-11 PACE Commands 67
- Table 4-12 STP Commands 68
- Table 4-14 IP ARP Commands 71
- IP Route Table 72
- Table 4-17 RIP Commands 74
- Configuration and 77
- Image Commands 77
- HAPTER 4: COMMANDS 78
- VIRTUAL LANS (VLANS) 79
- Marketing 81
- Switch 1 82
- Switch 2 82
- Accounting Engineering 83
- = All other traffic 87
- <hex_value> 88
- Configuring VLANs 89
- ■ EtherType 90
- Displaying VLAN 91
- ■ Status for each port 92
- ■ Protocol information 92
- ■ IP address 92
- ■ STPD information 92
- Deleting and 93
- Resetting VLANs 93
- SWITCH FORWARDING 95
- Configuring FDB 97
- Displaying FDB 97
- Removing FDB 98
- SPANNING TREE PROTOCOL (STP) 99
- ■ Initialization 101
- ■ Stabilization 101
- ■ Reconfiguration 101
- Spanning Tree 102
- Spanning Tree Domains 7-5 103
- STPD 1 STPD 2 104
- STP Configurations 7-7 105
- Sales & Engineering 106
- Enabling STP on 108
- Displaying STP 110
- Settings 110
- Disabling and 112
- Resetting STP 112
- IP UNICAST ROUTING 113
- HAPTER 8: IP UNICAST ROUTING 114
- ■ Static routes 115
- Configuring IP 116
- Unicast Routing 116
- Verifying the IP 117
- Configuration 117
- Configuring 117
- DHCP/BOOTP Relay 117
- (continued) 118
- Routing 122
- = IP traffic 123
- = NetBIOS traffic 123
- Displaying Router 124
- Resetting and 125
- Disabling Router 125
- STATUS MONITORING AND 127
- Port Statistics 9-5 131
- Configure logging options 136
- Reset logging options 136
- Display the log 136
- Clear the log 136
- RMON 9-13 139
- ■ 30-second intervals 140
- ■ 2-hour intervals 140
- Table 9-6 Event Actions 141
- SOFTWARE UPGRADE AND BOOT 143
- Boot Option 145
- Commands 145
- SAFETY INFORMATION 147
- PPENDIX A: SAFETY INFORMATION 148
- ■ CLASS 1 LASER DEVICE 149
- L’information de 150
- Sécurité Importante 150
- Wichtige 154
- Sicherheitsinformat 154
- TECHNICAL SPECIFICATIONS 159
- TROUBLESHOOTING 161
- Using the 162
- Command-Line 162
- Interface 162
- PPENDIX C: TROUBLESHOOTING 164
- TECHNICAL SUPPORT 167
- PPENDIX D: TECHNICAL SUPPORT 168
- Support from Your 169
- Network Supplier 169
- Returning Products 171
- GLOSSARY 173
- 2 GLOSSARY 174
- 4 GLOSSARY 176
- LIMITED WARRANTY 181
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