3Com 1000 - page 95

Spanning Tree Protocol 5-21

Designated Root This read-only field shows the

Bridge Identifier of the Root Bridge.

Designated Cost This read-only field shows the

path cost from the Root Bridge to the Designated

Bridge Port for the current port’s segment.

Designated Bridge This read-only field shows the

Bridge Identifier of the Designated Bridge for the

current port’s segment.

Fwd Transitions This read-only field shows the

number of times that the current port has transi-

tioned from the Learning state to the Forwarding

state.

Port Enable Enable / D isable This field allows you

to enable or disable the current port.

Priority 0...255 This field allows you to specify the

priority of the port. By changing the priority of the

port, you can make it more or less likely to become

the Root Port. The lower the number, the more

likely it is that the port will be the Root Port. The

default setting for this field is 128.

Path Cost 0...65535 This field allows yo u to specify

the path cost of the port.

The Switch automatically assigns the default path

costs shown in Tab le 5- 1 on page 5-14. If you spec-

ify a new path cost in this field, this automatic

system is disabled, and you can only re-enable it by

initializing the Switch .

Fast Start Enable / Disable This field allows you to

specify wh ether the port goe s directly to the Fo r-

warding state when a device is connected to it. Set

this field to Enable if the port is directly connected

to an endstation. The default setting for this field is

Disable.

CAUTION: If you set the Fast Start field to Enable

when the port is connected to multiple endstations,

loops may occur in your network.

Contents

Main 3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145 C A BOUT T HIS G 1 2 3 4 5 6 A B C D E F ABOUT THIS GUIDE Introduction How to Use This Guide Conventions Related Documentation 1 About the Switch 1000 Summary of Features Port Connections Switch Operation and Features Page Page Switch 1000 on Your Network Server Connections Network Configuration Examples Page Network Segmentation II Page Page 10BASE-T Ports 100BASE-TX Port LEDs Page Page Unit Defaults Managing the Switch 1000 Quick Start For SNMP Users Entering an IP Address for the Switch Page I S Configuration Rules for Fast Ethernet Configuration Rules with Full Duplex Page Installing the Switch 1000 Rack Mounting Stacking the Switch and Other Units Wall Mounting Powering-up the Swi tch Connecting a Redundant Power System (RPS) Connecting Equipmen t to the Console Port Connecting a VT100 Terminal Connecting a VT100 Terminal Emulator Connecting a Workstation Running SLIP 3 Methods of Managing the Switch 1000 Using the VT100 Management Interface Using Telnet Managing Over Th e Network IP Addresses Page 3-4 CHAPTER 3: SETTING UP FOR MANAGEMENT Navigating the VT100 Screens Screen Conventions To differentiate types of information, the VT100 screens use the following conventions: Keyboard Shortcuts Correcting Text Entry Setting Up the Switch for Management Logging On Page Switch Management Setup Page Page Logging Off Auto Logout M S T 1000 Setting Up Users Creating a New User Deleting a User Editing User Details Assigning Local Security Choosing a Switch Management Level Page Setting Up the Switch Unit Page Page Setting Up the Switch Ports Page Page Page Setting Up the Switch Database (SDB) The Database View Searching the Switch Database Adding an Entry into the SDB Deleting an Entry from the SDB Specifying that an Entry is Permanent Setting Up Resilient Links Configuring Resilient Links Creating a Resilient Link Pair Deleting a Resilient Link Viewing the Resilient Setup Page Setting Up Traps Setting Up the Console Port Page Resetting the Switch Initializing the Switch Upgrading Software Page 5 Virtual LANs (VLANs) What are VLANs? Benefits of VLANs An Example VLANs and the Switch Connecting VL ANs to a Router Page VLAN Configurati ons Page Page Setting Up VLANs on the Switch Page Page Setting Up VLANs Using Auto Select VLAN Mode Spanning Tree Protocol What is STP? Page How STP Works Page STP Configurations Enabling STP on the Switch Configuring STP on the Switch Page Page Page RMON What is RMON? About the RMON Groups Page Benefits of RMON RMON and the Switch RMON Features of the Switch Page 5-28 CHAPTER 5: ADVANCED MANAGEMENT About Alarm Actions About Default Alarm Settings About the Audit Log Page 6 Summary Statistics Port Statistics Port Traffic Statistics Page Port Error Analysis Page Status Monitoring Fault Log Remote Polling A Important Safety Information Page Power Supply and Fuse Sockets for Redundant Power System (RPS) RJ45 Ports Fiber Ports Linformation de Scurit Importante La Source de Courant et Le Fusible Socle Pour Alimentation Multiple Les Ports RJ45 Les Ports Fibre Wichtige Sicherheit sinformationen Stromversorgung und Sicherung Steckdose fr Redundant Power System (RPS) RJ45 Anschluen Glasfaser Anschluen B B-2 APPENDIX B: SCREEN ACCESS RIGHTS C - N I T Using the VT100 Interface Using the Switch Page Page Page Page Page E Physical Dimensions E-2 APPENDIX E: SWITCH 1000 TECHNICAL SPECIFICATIONS F Online Technical Services World Wide Web Site 3Com Bulletin Board Service 3ComFacts Automated Fax Service 3ComForum on CompuServe Online Service Support from Your Network Supplier Support from 3Com F-4 APPENDIX F: TECHNICAL SUPPORT Returning Products for Repair Regional Sales Office Telephone Number 44 1442 438125 44 1442 435822 Elsewhere 1 408 326 7804 1 408 764 7120 G Page Page Page Page Page I Numerics A B C D E F H I K L M Q R S T U V W Z 3Com Corporation LIMITED WARRANTY H S S TANDARD W W ARRANTIES E ELECTRO-MAGNETIC COMPATIBILITY FCC S VCCI S CSA S INFORMATION T