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7-6 CHAPTER 7: SPANNING TREE PROTOCOL (STP)
STP Configurations When you assign VLANs to an STPD, pay careful attention to the STP
configuration and its effect on the forwarding of VLAN traffic.
Figure 7-4 illustrates a network that uses VLAN tagging for trunk
connections. The following four VLANs have been defined:
■ Sales is defined on Switch A, Switch B, and Switch M.
■ Personnel is defined on Switch A, Switch B, and Switch M.
■ Manufacturing is defined on Switch Y, Switch Z, and Switch M.
■ Engineering is defined on Switch Y, Switch Z, and Switch M.
■ Marketing is defined on all Switches (Switch A, Switch B, Switch Y,
Switch Z, and Switch M).
Two STPDs are defined:
■ STPD1 contains VLANs Sales and Personnel.
■ STPD2 contains VLANs Manufacturing and Engineering.
The VLAN Marketing is not assigned to a STPD.
Figure 7-4 Multiple Spanning Tree Domains
Sales, Personnel, Marketing
STPD 1 STPD 2
Manufacturing, Engineering, Marketing
Sales, Personnel, Manufacturing, Engineering, Marketing
Switch A Switch Y
Switch Z
Switch M
Switch B
SW3800.BK Page 6 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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