CoreBui|der® 3500
`Implementation Guide
`
`Release 3.0
`
`Pubiished November 1999
`
`http://www.3com.com/
`
`Part No. 10013506
`
`1
`
`ARISTA 1009
`
`1
`
`ARISTA 1009
`
`

`
`3Com Corporation
`5400 Bayfront Plaza
`Santa Clara, California
`95052-8145
`
`Copyright © 1999, 3Com Corporation. All rights reserved. No part of this documentation may be reproduced
`in any form or by any means or used to make any derivative work (such as translation, transformation, or
`adaptation) without written permission from 3Com Corporation.
`3Com Corporation reserves the right to revise this documentation and to make changes in content from time
`to time without obligation on the part of 3Com Corporation to provide notification of such revision or change.
`3Com Corporation provides this documentation without warranty, term, or condition of any kind, either
`implied or expressed, including, but not limited to, the implied warranties, terms, or conditions of
`merchantability, satisfactonr quality, and fitness for a particular purpose. 3Com may make improvements or
`changes in the product(s) and/or the program(s) described in this documentation at any time.
`if there is any software on removable media described in this documentation, it is furnished under a license
`agreement included with the product as a separate document, in the hardcopy documentation, or on the
`removable media in a directory file named LlCENSE.TXT or !LlCENSE.TXT. If you are unable to locate a copy,
`please contact 3Com and a copy will be provided to you.
`UNITED STATES GOVERNMENT LEGEND
`
`If you are a United States government agency then this documentation and the software described herein are
`provided to you subject to the following:
`All technical data and computer software are commercial in nature and developed solely at private expense.
`Software is delivered as "Commercial Computer Software" as defined in DFARS 252227-7014 (June 1995) or
`as a "commercial item” as defined in FAR 2.101(a) and as such is provided with only such rights as are
`provided in 3Com’s standard commercial license for the Software. Technical data is provided with limited rights
`only as provided in DFAR 252227-7015 (Nov 1995) or FAR 52227-14 (June 1987), whichever is applicable.
`You agree not to remove or deface any portion of any legend provided on any licensed program or
`documentation contained in, or delivered to you in conjunction with, this User Guide.
`Unless othen/vise indicated, 3Com registered trademarks are registered in the United States and may or may
`not be registered in other countries.
`3Com, the 3Com logo, CoreBuilder, DynamicAccess, NETBuilder ll, PACE, SmartAgent, SuperStack, and
`Transcend are registered trademarks of 3Com Corporation. 3Com Facts is a service mark of
`3Com Corporation.
`
`Postscript is a registered trademark of Adobe Systems, Inc. App|eTalk is a registered trademark of Apple
`Computer, Incorporated. Banyan and VINES are registered trademarks of Banyan Worldwide. DEC, DECnet,
`and PATHWORKS are registered trademarks of Compaq Computer Corporation. Openview is a registered
`trademark of Hewlett~Packard Company. AIX, IBM, and Netview are registered trademarks and NetBlOS is a
`trademark of International Business Machines Corporation. Internet Explorer, Microsoft, MS—DOS, Windows,
`and Windows NT are registered trademarks of Microsoft Corporation. Netscape, Netscape Navigator, and the
`Netscape N and Ship's Wheel logos are registered trademarks of Netscape Communications Corporation in the
`United States and other countries. IPX, Novell, and NetWare are registered trademarks of Novell, Inc. Sun and
`SunNet Manager are trademarks of Sun Microsystems, Inc. UNIX is a registered trademark in the United States
`and other countries, licensed exclusively through X/Open Company, Ltd. Xerox and XNS are trademarks of
`Xerox Corporation.
`
`All other company and product names may be trademarks of the respective companies with which they are
`associated.
`
`Guide written by 3Com MSD Technical Publications, Marlborough, MA, USA.
`We welcome your comments on this guide. Send e—mail to: sdtechpubs_comments@ne.3com.com
`
`2
`
`

`
`CONTENTS
`
`ABOUT THIS GUIDE
`
`Conventions
`
`22
`
`CoreBuilder 3500 Documentation
`
`24
`
`24
`Paper Documents
`Software and Documents on CD—ROM
`
`26
`
`Documentation Comments
`
`26
`
`Year 2000 Compliance
`
`26
`
`CONFIGURATION OVERVIEW
`
`System Configuration Procedure
`Procedure Summary
`27
`
`27
`
`Configuration Procedure
`
`28
`
`MANAGEMENT ACCESS
`
`31
`Management Access Overview
`Administration Console Overview
`
`32
`
`SNMP—Based Network Management Overview
`
`34
`
`Key Concepts
`OSI Protocols
`
`34
`
`34
`
`Protocols
`
`35
`
`Key Guidelines for implementation
`Access Methods
`38
`
`38
`
`Administration Console Access
`
`40
`
`Password Levels
`
`40
`
`Terminal Port Access
`
`Modem Port Access
`
`41
`
`41
`
`Web Management Access
`
`Browser Requirements
`SNMP Access
`43
`
`42
`
`42
`
`3
`
`

`
`SYSTEM PARAMETERS
`
`System Parameters Overview
`Features
`46
`
`46
`
`Benefits
`
`47
`
`Key Concepts
`
`47
`
`Key Guidelines for Implementation
`File Transfer
`48
`
`48
`
`Implementing FTP
`
`48
`
`Implementing TFTP
`
`49
`
`Security
`
`49
`
`Security Options
`
`50
`
`ImportantConsiderations
`
`51
`
`Software Update
`
`52
`
`ImportantConsiderations
`nvData Operations
`53
`
`52
`
`Saving nvData
`
`53
`
`Restoring nvData
`
`Resetting nvData
`
`54
`
`55
`
`Viewing nvData
`
`55
`
`Simple Network Time Protocol (SNTP)
`SNTP Overview
`56
`
`56
`
`57
`Implementing SNTP
`Standards, Protocols, and Related Reading
`
`57
`
`PHYSICAL PORT NUMBERING
`
`Port Numbering Overview
`
`59
`
`Numbering Rules
`
`59
`
`Supported Module Types
`
`60
`
`Key Guidelines for Implementation
`
`61
`
`Examples of Port Numbering
`
`62
`
`Example 1: Fully Loaded System
`
`62
`
`Example 2: Empty Slot in the System 63
`Example 3: Gigabit Ethernet Module with Other Modules
`Example 4: FDDI Module with Other Modules
`65
`Effects of Removing a Module
`66
`
`64
`
`Port—Numbering Changes
`
`66
`
`VLAN Changes
`
`Trunk Changes
`
`66
`
`67
`
`4
`
`

`
`68
`Effects of Replacing Modules
`Replacing Modules of the Same Type or Same Number of Ports
`Replacing Modules of Different Types
`68
`
`68
`
`ETHERNET
`
`Ethernet Overview
`
`72
`
`Features
`
`Benefits
`
`72
`
`73
`
`74
`Key Concepts
`Ethernet Frame Processing
`
`76
`
`Key Guidelines for Implementation
`Link Bandwidths
`78
`
`78
`
`Trunks
`
`78
`
`Port Enable and Disable (Port State)
`
`79
`
`|mportantConsiderations
`Port Labels
`79
`
`79
`
`Labeling Ports
`
`79
`
`Autonegotiation
`
`80
`
`Important Considerations
`Port Mode
`82
`
`|mportantConsiderations
`Flow Control
`83
`
`Important Considerations
`PACE Interactive Access
`84
`
`80
`
`82
`
`83
`
`84
`important Considerations
`Standards, Protocols, and Related Reading
`Ethernet Protocols
`84
`
`84
`
`Media Specifications
`
`85
`
`Related Reading
`
`85
`
`5
`
`

`
`6
`
`FIBER DISTRIBUTED DATA INTERFACE (FDDI)
`FDDI Overview
`88
`Features
`
`88
`
`Benefits
`
`88
`
`89
`Key Concepts
`Related Standards
`
`89
`
`FDDI Network Topologies
`Nodes and Attachments
`
`91
`93
`
`Dual Homing
`FDDI Stations
`
`97
`97
`
`Primary and Secondary Paths
`Media Access Control
`99
`Ports
`100
`
`99
`
`Key Guidelines for Implementation
`FDDI Stations
`102
`
`101
`
`Setting the Connection Policies
`
`102
`
`Setting Neighbor Notification Timer
`
`104
`
`Enabling and Disabling Status Reporting
`FDDI Paths
`104
`
`104
`
`Setting tvxLowerBound
`
`104
`
`Setting tmaxLowerBound
`Setting maxT—Req
`105
`FDDI MACS
`106
`
`105
`
`Setting the Frame Error Threshold
`
`Setting the Not Copied Threshold
`
`Enabling and Disabling LLC Service
`FDDI Ports
`107
`
`106
`
`106
`
`107
`
`Setting lerAlarm
`
`Setting lerCutoff
`
`107
`
`108
`
`108
`Setting Port Labels
`Station Mode (DAS and SAS)
`
`109
`
`Single Attachment Station (SAS)
`Dual Attachment Stations
`109
`
`109
`
`109
`Sample FDDI Configurations
`Standards, Protocols, and Related Reading
`
`111
`
`Requests For Comments (RFCs)
`
`111
`
`Standards Organizations
`
`111
`
`Related Reading
`
`111
`
`6
`
`

`
`BRlDGE—W|DE AND BRIDGE PORT PARAMETERS
`
`Bridging Overview
`Benefits
`114
`
`114
`
`Features
`
`115
`
`Key Bridging Concepts
`Learning Addresses
`
`116
`116
`
`116
`Aging Addresses
`Forwarding, Filtering, and Flooding Packets
`
`116
`
`117
`Spanning Tree Protocol
`How the Spanning Tree Protocol Works
`CBPDUs at Work
`119
`
`119
`
`How a Single Bridge Interprets CBPDUS
`
`How Multiple Bridges Interpret CBPDUS
`
`123
`
`124
`
`129
`Spanning Tree Port States
`Reconfiguring the Bridged Network Topology
`
`131
`
`132
`Key Guidelines for implementation
`134
`STP Bridge and Port Parameters
`Administering Bridge—wide STP Parameters
`Administering STP Parameters on Bridge Ports
`Frame Processing
`137
`MAC Address Table
`138
`
`134
`136
`
`138
`Aging Time
`Address Threshold
`
`A
`138
`
`important Considerations
`
`138
`
`IP Fragmentation
`IPX SNAP Translation
`
`139
`
`139
`
`Broadcast and Multicast Limit for Bridge Ports
`
`140
`
`Important Considerations
`140
`GARP VLAN Registration Protocol (GVRP)
`
`141
`
`|mportantConsiderations
`
`141
`
`Standards, Protocols, and Related Reading
`
`142
`
`7
`
`

`
`8
`
`TRUNKING
`
`Trunking Overview
`Features
`144
`
`144
`
`Benefits
`
`144
`
`145
`Key Concepts
`Port Numbering in a Trunk
`145
`Trunk Control Message Protocol (TCMP)
`
`146
`
`Key Guidelines for implementation
`General Guidelines
`147
`
`147
`
`Trunk Capacity Guidelines
`
`148
`
`Defining Trunks
`
`150
`
`Important Considerations
`
`150
`
`Modifying Trunks
`152
`Important Considerations
`
`152
`
`Removing Trunks
`
`153
`
`153
`important Considerations
`Standards, Protocols, and Related Reading
`
`154
`
`9
`
`VIRTUAL LANs
`
`VLAN Overview
`
`156
`
`Need for VLANs
`
`156
`
`Benefits
`
`Features
`
`157
`
`158
`
`159
`Key Concepts
`Related Standards and Protocols
`VLAN iDS
`160
`
`159
`
`Terminology
`
`161
`
`163
`Key Guidelines for Implementation
`Network—based VLANs vs. Multiple interfaces per VLAN
`
`163
`
`VLANS Created by Router Port lP Interfaces
`Number of VLANs
`165
`
`164
`
`General Guidelines
`
`167
`
`VLAN allOpen or allClosed Mode
`
`169
`
`Important Considerations
`Modifying the VLAN Mode
`Mode Requirements
`171
`
`169
`170
`
`8
`
`

`
`172
`lgnore STP Mode
`important Considerations
`VLAN Aware Mode
`174
`
`172
`
`Port—based VLANs
`
`175
`
`The Default VLAN
`
`175
`
`Static Port~based VLANs
`178
`Dynamic Port—based VLANS Using GVRP
`Protocol-based VLANs
`186
`
`182
`
`186
`|mportantConsiderations
`187
`Selecting a Protocol Suite
`Establishing Routing Between VLANs
`Network-based IP VLANS
`192
`
`189
`
`192
`important Considerations
`Example of Netvvork—based VLANs
`Rules of VLAN Operation
`195
`
`193
`
`ingress Rules
`
`195
`
`198
`Egress Rules
`Examples of Flooding and Forwarding Decisions
`Rules for Network—based (Layer 3) VLANs
`202
`
`200
`
`Modifying and Removing VLANS
`
`206
`
`Monitoring VLAN Statistics
`
`207
`
`10
`
`PACKET FILTERING
`
`Packet Filtering Overview
`What Can You Filter?
`
`210
`210
`
`When is a Filter Applied? — Paths
`Path Assignment
`212
`
`211
`
`213
`Key Concepts
`Standard Packet Filters
`
`213
`
`Custom Packet Filters
`
`214
`
`important Considerations
`
`215
`
`Managing Packet Filters
`Tools for Writing Filters
`ASCll Text Editor
`
`215
`217
`217
`
`Built—in Line Editor
`
`217
`
`Web Management Filter Builder Tool
`
`219
`
`9
`
`

`
`Downloading Custom Packet Filters
`Download with
`Filter Builder
`
`221
`
`221
`
`Download an
`ASCll File
`222
`
`The Packet Filtering Language
`224
`Principles for Writing a Custom Filter
`How the Packet Filter Language Works
`
`224
`224
`
`Procedure for Writing a Custom Filter
`
`225
`
`228
`Packet Filter Opcodes
`Implementing Sequential Tests in a Packet Filter
`Common Syntax Errors
`235
`Custom Packet Filter Examples
`Destination Address Filter
`
`237
`237
`
`233
`
`Source Address Filter
`
`237
`
`Length Filter
`
`237
`
`238
`Type Filter
`Ethernet Type IPX and Multicast Filter
`Multiple Destination Address Filter
`Source Address and Type Filter
`239
`
`238
`238
`
`Accept XNS or IP Filter
`XNS Routing Filter
`240
`
`239
`
`Port Group Filter
`Limits to Filter Size
`
`240
`241
`
`Using Port Groups in Custom Packet Filters
`Port Group Packet Filter Example
`242
`
`242
`
`242
`Port Group Filter Operation
`Port Group Management and Control Functions
`Defining Port Groups
`245
`
`Z45
`
`Long Custom Filter Example
`Filtering Problem 247
`Packet Filter Solution
`
`247
`
`247
`
`Optimizing the Filter with Accept and Reject Commands
`
`254
`
`10
`
`10
`
`

`
`11
`
`INTERNET PROTOCOL (IP)
`
`Routing Overview
`
`258
`
`Routing in a Subnetted Environment
`
`259
`
`Integrating Bridging and Routing
`
`260
`
`IP Routing Overview
`Features and Benefits
`
`261
`262
`
`Key Concepts
`
`263
`
`263
`Multiple IP Interfaces per VLAN
`Media Access Control (MAC) Address
`
`263
`
`Network-LayerAddress
`IP Addresses
`264
`
`264
`
`Variable Length Subnet Masks (VLSMs)
`Router Interfaces
`271
`
`268
`
`Routing Table
`
`272
`
`Routing Models: Port—based and VLAN—based
`
`274
`
`Role of VLANs in IP Routing
`
`275
`
`Port—based Routing
`
`276
`
`VLAN—based Routing
`
`280
`
`Key Guidelines for Implementing IP Routing
`
`282
`
`Configure Trunks (Optional)
`
`282
`
`Configure IP VLANs (VLAN—based Routing)
`Establish Your IP Interfaces
`283
`
`282
`
`Enable IP Routing
`
`285
`
`285
`Administering IP Routing
`Address Resolution Protocol (ARP)
`
`286
`
`Important Considerations
`
`288
`
`ARP Proxy
`
`288
`
`Important Considerations
`
`288
`
`Example
`
`288
`
`Internet Control Message Protocol (ICMP)
`ICMP Redirect
`292
`
`290
`
`ImportantConsiderations
`
`292
`
`Example
`
`293
`
`ICMP Router Discovery
`
`294
`
`Important Considerations
`
`294
`
`294
`Example
`Broadcast Address
`
`295
`
`Important Considerations
`
`295
`
`11
`
`11
`
`

`
`Directed Broadcast
`
`295
`
`295
`Important Considerations
`Routing Information Protocol (RIP)
`Basic RIP Parameters
`296
`RIP l\/lode
`297
`
`296
`
`Compatibility I\/lode
`Cost
`297
`
`297
`
`298
`Poison Reverse
`AdvertisementAddress
`
`298
`
`Route Aggregation
`RIP-1 Versus RIP—2
`
`299
`299
`
`Important Considerations
`
`300
`
`300
`g Routing Policies
`How Routing Policies Work
`
`301
`
`303
`Important Considerations
`Implementing RIP Routing Policies
`Setting Up RIP Routing Policies
`
`303
`306
`
`Creating RIP Routing Policies
`
`307
`
`Example
`
`308
`
`Domain Name System (DNS)
`
`310
`
`310
`Important Considerations
`User Datagram Protocol (UDP) Helper
`Configuring Overlapped Interfaces
`
`311
`312
`
`313
`Important Considerations
`Standards, Protocols, and Related Reading
`
`313
`
`Requests For Comments (RFCs)
`Standards Organizations
`314
`
`313
`
`Related Reading
`
`314
`
`12
`
`VIRTUAL ROUTER REDUNDANCY PROTOCOL (VRRP)
`VRRP Overview
`316
`
`Router to Router
`
`316
`
`Host to Host and Host to Gateway
`
`316
`
`Example
`
`317
`
`318
`Key Concepts
`How VRRP Works
`
`319
`
`Virtual Router Decision—making
`
`320
`
`Important Considerations
`
`322
`
`12
`
`12
`
`

`
`Implementing VRRP
`Create VLANs
`
`323
`324
`
`Configure IP Interfaces
`324
`Configure the Router Protocol
`Enable Routing
`325
`
`325
`
`Configure VRRP
`Enable VRRP
`
`325
`326
`
`VRRP and Other Networking Operations
`
`326
`
`327
`Spanning Tree Protocol (STP)
`Dynamic Routing Protocols (RIP, RIP—2, OSPF)
`IGMP Queries
`328
`ICMP Redirect
`329
`
`327
`
`Quality of Service
`
`329
`
`IP Routing Policies
`329
`Dynamic Host Configuration Protocol (DHCP)
`Standards, Protocols, and Related Reading
`329
`
`329
`
`13
`
`IP M ULTICAST ROUTING
`
`IP Multicast Overview
`
`332
`
`Unicast Model
`
`332
`
`Broadcast Model
`
`Multicast Model
`
`332
`
`332
`
`Benefits of IP Multicast
`
`333
`
`How a Network Supports IP Multicast
`
`334
`
`IP Multicast Routing
`IP Multicast Tunnels
`
`334
`335
`
`IP Multicast Filtering
`
`336
`
`Internet Support for IP Multicast
`
`337
`
`338
`Key Concepts
`Traffic Movement
`
`338
`
`IP Multicast Groups
`
`Source—Group Pairs
`Multicast Addresses
`
`338
`
`338
`339
`
`How IGMP Supports IP Multicast
`
`Electing the Querier
`
`341
`
`341
`
`341
`Host Messages
`Role of IGMP in IP Multicast Filtering
`
`342
`
`13
`
`13
`
`

`
`How DVMRP Supports IP I\/Iulticast
`
`343
`
`Spanning Tree Delivery
`
`343
`
`Managing the Spanning Tree
`DVMRP Interface Characteristics
`
`Key Guidelines for Implementation
`Configuration Procedure
`347
`
`344
`
`346
`
`347
`
`348
`Impact of Multicast Limits
`Impact of IEEE 802.1 Q on Multicasts
`Protocol Interoperability
`348
`
`348
`
`349
`Configuring IGIVIP Options
`Querying and Snooping Modes
`349
`
`Important Considerations
`Configuring DVMRP Interfaces
`Important Considerations
`350
`Configuring DVMRP Tunnels
`350
`Important Considerations
`Configuring DVMRP Default Routes
`How Default Routes Work
`352
`
`349
`
`349
`
`349
`
`352
`
`352
`
`How to Configure A Default Route
`Viewing the DVMRP Routing Table
`353
`Viewing the DVMRP Cache
`353
`Using IP Multicast Traceroute
`354
`Standards, Protocols, and Related Reading
`
`355
`
`14
`
`OPEN SHORTEST PATH FIRST (OSPF)
`
`OSPF Overview
`Features
`
`358
`358
`
`Benefits
`
`360
`
`363
`Key Concepts
`Autonomous Systems
`Areas
`363
`
`363
`
`Neighbors and Adjacency
`RouterTypes
`364
`Protocol Packets
`365
`
`363
`
`How OSPF Routing Works
`
`366
`
`Key Guidelines for Implementing OSPF
`Autonomous System Boundary Routers
`
`Configuring an ASBR
`
`370
`
`369
`
`370
`
`14
`
`14
`
`

`
`Areas
`
`372
`
`373
`Types of Areas
`Area Border Routers
`
`375
`
`A
`375
`Routing Databases
`Configuring Route Summarization in ABRs
`important Considerations
`376
`379
`Default Route Metric
`380
`
`OSPF Interfaces
`380
`
`Mode
`
`376
`
`Priority
`Area lD
`
`380
`
`381
`
`Cost
`
`381
`
`382
`Delay
`Hello Interval
`
`383
`
`Retransmit interval
`
`383
`
`Dead Interval
`
`384
`
`Password
`
`384
`
`Statistics
`
`384
`
`important Considerations
`Link State Databases
`387
`
`385
`
`Router Link State Advertisements
`
`387
`
`Network Link State Advertisements
`
`388
`
`Summary Link State Advertisements
`External Link State Advertisements
`
`389
`389
`
`lmportantConsiderations
`
`391
`
`Neighbors
`
`392
`
`Neighbor Information
`Static Neighbors
`395
`
`392
`
`Important Considerations
`Router lDs
`396
`
`important Considerations
`OSPF Memory Partition
`397
`
`395
`
`396
`
`Default Memory Allocation
`397
`Running Out of Memory — Soft Restarts
`Manual Memory Allocation
`399
`
`398
`
`System Memory Allocation
`Stub Default Metrics
`400
`
`399
`
`Important Considerations
`
`400
`
`15
`
`15
`
`

`
`Virtual Links
`
`401
`
`Important Considerations
`
`OSPF Routing Policies
`
`403
`
`Important Considerations
`
`402
`
`404
`
`Implementing Import Policies
`
`Implementing Export Policies
`OSPF Statistics
`416
`
`405
`
`408
`
`Standards, Protocols, and Related Reading
`
`417
`
`15
`
`IPX ROUTING
`
`IPX Routing Overview
`Features
`420
`
`419
`
`Benefits
`
`420
`
`Key Concepts
`
`421
`
`How IPX Routing Works
`
`421
`
`Terminology
`
`426
`
`Key Guidelines for Implementation
`427
`Procedural Guidelines
`
`General Guidelines
`
`427
`
`IPX Interfaces
`
`428
`
`Important Considerations
`
`428
`
`Per—Inten°ace Options
`IPX Routes
`430
`
`429
`
`427
`
`Important Considerations
`
`430
`
`Primary and Secondary Routes
`Static Routes
`431
`
`431
`
`Dynamic Routes Using RIP
`
`431
`
`Routing Tables
`
`432
`
`Selecting the Best Route
`IPX Servers
`434
`
`433
`
`Important Considerations
`
`434
`
`Primary and Secondary Servers
`Static Servers
`435
`
`435
`
`Dynamic Servers Using SAP
`
`435
`
`Maintaining Server Information
`Server Tables
`436
`
`435
`
`IPX Fon/varding
`
`437
`
`Important Considerations
`
`437
`
`16
`
`16
`
`

`
`IPX RIP Mode
`
`438
`
`Important Considerations
`RIP Policies
`439
`
`438
`
`IPX SAP Mode
`
`441
`
`ImportantConsiderations
`SAP Policies
`441
`
`441
`
`IPX Statistics
`
`443
`
`Standards, Protocols, and Related Reading
`
`444
`
`16
`
`APPLETALK
`
`AppIeTaIk Overview
`Features
`446
`
`445
`
`Benefits
`
`447
`
`Key Concepts
`
`448
`
`AppleTa|k Protocols
`
`448
`
`AppleTall< Network Elements
`Terminology
`455
`
`Key Implementation Guidelines
`AppleTalk Interfaces
`458
`
`454
`
`457
`
`Important Considerations
`
`459
`
`AppleTall< Routes
`
`460
`
`460
`Important Considerations
`AppleTall< Address Resolution Protocol (AARP) Cache
`AppleTalk Zones
`464
`
`462
`
`Important Considerations
`
`465
`
`Changing Zone Names
`
`466
`
`Forwarding AppleTalk Traffic
`
`468
`
`Enabling Forwarding
`
`468
`
`Disabling Forwarding
`
`468
`
`ImportantConsiderations
`Checksum Error Detection
`
`468
`469
`
`ImportantConsiderations
`
`469
`
`AppleTaIk Echo Protocol (AEP)
`
`469
`
`App|eTalk Statistics
`
`470
`
`Datagram Delivery Protocol
`470
`Routing Table Maintenance Protocol
`
`471
`
`17
`
`17
`
`

`
`Zone information Protocol
`
`472
`
`473
`Name Binding Protocol
`Standards, Protocols, and Related Reading
`
`474
`
`17
`
`Q05 AND RSVP
`
`QoS Overview
`Features
`
`476
`476
`
`Benefits
`
`476
`
`Methods of Using QoS
`
`477
`
`478
`Key Concepts
`Related Standards and Protocols
`
`Terminology
`
`479
`
`Key Guidelines for Implementation
`Procedural Guidelines
`482
`
`General Guidelines
`
`482
`
`QoS Classifiers
`
`483
`
`Important Considerations
`
`483
`
`478
`
`482
`
`483
`Using Predefined Classifiers
`Assigning Flow and Nonflow Classifier Numbers
`Defining Flow Classifiers
`485
`
`484
`
`Defining Nonflow Classifiers
`
`QoS Controls
`
`489
`
`Important Considerations
`
`Assigning Control Numbers
`
`488
`
`489
`
`490
`
`494
`
`492
`Specifying Rate Limits
`493
`Specifying Service Levels
`Specifying TCP Drop Control
`495
`Setting the QoS Timer Control
`497
`Examples of Classifiers and Controls
`Example 1: Traffic to and from a Specific Server
`Example 2: Filtering Traffic to a Destination
`499
`501
`Example 3: Using Two Classifiers to Filter Traffic
`Example 4: Assigning High Priority to Specific Traffic
`Example 5: Nonflow Multimedia Tagged Traffic
`506
`Example 6: Bridged Nonflow lP Unicast Traffic
`508
`Modifying and Removing Classifiers and Controls
`510
`important Considerations
`510
`
`497
`
`504
`
`18
`
`18
`
`

`
`QoS Excess Tagging
`511
`Example of QoS Excess Tagging
`Transmit Queues and QOS Bandwidth
`LDAP
`514
`
`511
`513
`
`Important Considerations
`
`514
`
`Operation
`RSVP
`516
`
`515
`
`RSVP Terminology
`
`517
`
`Example of RSVP
`
`518
`
`Setting RSVP Parameters
`
`S20
`
`18
`
`DEVICE MONITORING
`
`Device Monitoring Overview
`
`522
`
`Key Concepts and Tools
`Administration Console
`
`522
`522
`
`522
`Web Management Tools
`Network Management Platform
`
`S23
`
`SmartAgent Embedded Software
`Other Commonly Used Tools
`523
`
`523
`
`Event Logging
`
`524
`
`524
`|mportantConsideration
`Displaying the Event Log Configuration
`Configuring the Output Devices
`524
`
`524
`
`Configuring the Services
`
`524
`
`Baselining
`
`525
`
`525
`Important Considerations
`Displaying the Current Baseline
`
`525
`Setting a Baseline
`Enabling or Disabling Baselines
`
`525
`
`525
`
`526
`Roving Analysis
`Key Guidelines for Implementation
`Important Considerations
`527
`Ping
`530
`Important Consideration
`Using Ping
`530
`
`530
`
`530
`Ping Responses
`Strategies for Using ping
`
`531
`
`527
`
`19
`
`19
`
`

`
`traceRoute
`
`532
`
`Using traceRoute
`
`532
`
`traceRoute Operation
`SNMP
`533
`
`SNMP Overview 533
`
`532
`
`Setting Up SNMP on Your System
`
`Remote Monitoring (RMON)
`Overview of RMON
`542
`
`541
`
`RMON Benefits
`
`543
`
`538
`
`544
`RMON in Your System
`3Com Transcend RMON Agents
`
`545
`
`lmportantConsiderations
`RMON—1 Groups
`547
`
`546
`
`Rl\/lON—2 Groups
`
`552
`
`Management Information Base (MIB)
`MIB Files
`556
`
`556
`
`558
`
`Compiler Support
`
`MIB Objects
`MIB Tree
`
`559
`560
`
`MIB-ll
`
`562
`
`RMON-1 MIB
`
`RMON—2 MlB
`
`563
`
`564
`
`3Com Enterprise MlBs
`
`565
`
`A
`
`TECHNICAL SUPPORT
`
`Online Technical Services
`
`World Wide Web Site
`
`567
`
`567
`
`3Com Knowledgebase Web Services
`3Com FFP Site
`568
`
`3Com Bulletin Board Service
`
`568
`
`3Com Facts Automated Fax Service
`
`Support from Your Network Supplier
`
`Support from 3Com 569
`
`Returning Products for Repair
`
`571
`
`567
`
`569
`
`569
`
`INDEX
`
`20
`
`20
`
`

`
`ABOUT THIS GUIDE
`
`This guide describes information that you need to use features of the
`CoreBuilder® 3500 system after you install it and attach the system to
`your network. Before you use this guide:
`0
`
`- Verify that your system is installed and set up using the
`CoreBui/der 3500 Getting Started Guide.
`
`- Become familiar with the Command Reference Guide, which
`
`documents the commands that are used to configure and manage
`your system.
`
`I Read Chapter 1 for an overview of the configuration process.
`
`This guide is intended for the system or network administrator who is
`responsible for configuring, using, and managing the CoreBuilder 3500
`system. It assumes a working knowledge of local area network (LAN)
`operations and familiarity with communications protocols that are used
`on interconnected LANS.
`
`/f the information in the release notes differs from the information in this
`
`guide, follow the instructions in the release notes.
`
`The most current versions of guides and release notes are available in
`Adobe Acrobat Reader Portable Document Format (PDF) or HTML from
`the 3Com World Wide Web site:
`
`http://www.3com.com
`
`21
`
`21
`
`

`
`22
`
`ABOUT THIS GUIDE
`
`Conventions
`
`Table i and Table 2 list conventions that are used throughout this guide.
`
`Table 1 Notice icons
`
`Description
`
`Notice Type
`
`icon
`
`§ information note
`E
`Caution
`f
`Warning
`
`information that describes important features or
`instructions
`
`information that alerts you to potential loss of data or
`potential damage to an application, system, or device
`
`information that alerts you to potential personal injury
`
`Layer 2 switch
`
`in figures, a switch that can perform Layer 2 functions
`
`Layer 3 switch
`
`in figures, a switch that can perform both Layer 2 and
`Layer 3 functions
`
`
`Table 2 Text Conventions
`
`Convention
`
`Description
`
`Screen displays This typeface represents information as it appears on the
`screen.
`
`Syntax
`
`Commands
`
`The words "enter”
`and "type”
`
`Keyboard key names
`
`The word "syntax" means that you evaluate the syntax
`provided and then supply the appropriate values for the
`placeholders that appear in angle brackets. Example:
`
`To set the system date and time, use the following syntax:
`CCYY—MM-DDThh:mm:ss
`
`The word "command” means that you must enter the
`command exactly as shown and then press Return or Enter.
`Commands appear in bold. Example:
`
`To remove an IP interface, enter the following command:
`
`ip interface remove
`
`When you see the word ”enter" in this guide, you must type
`something, and then press Return or Enter. Do not press
`Return or Enter when an instruction simply says ”type.”
`
`if you must press two or more keys simultaneously, the key
`names are linked with a plus sign (+). Example:
`Press Ctr|+Alt+Del.
`
`22
`
`22
`
`

`
`Conventions
`
`23
`
`Table 2 Text Conventions (continued)
`
`
`Convention
`
`Description
`
`Words in italics
`
`Italics are used to:
`
`. Emphasize a point
`
`- Denote a new term at the place where it is defined in the
`text
`
`-
`
`Identify menu names, menu commands, and software
`button names. Examples:
`
`From the Help menu, select Contents.
`Click OK.
`
`
`23
`
`23
`
`

`
`! 24
`
`ABOUT THIS GUIDE
`
`CoreBui|der 3500
`Documentation
`
`The following documents comprise the CoreBuilder 3500 documentation
`set. Documents are available in one of two forms:
`
`- Paper Documents
`
`The paper documents that are shipped with your system and
`components are listed in the next section.
`
`- Software and Documents on CD—ROM
`
`The System Software and Documentation CD contains online versions
`of the paper documents, this Implementation Guide, and the
`Command Reference Guide, as well as the CoreBuilder 3500 system
`software.
`
`To order additional copies of the paper documents and the CD—ROM,
`contact your sales representative.
`
`Paper Documents
`
`These documents are shipped with your system:
`
`- CoreBui/der 3500 Unpacking Instructions
`
`How to unpack your system. Also, an inventory list of all the items that
`are shipped with yoursystem.
`
`- CoreBui/der 3500 Software Installation and Release Notes
`
`Information about the software release, including new features,
`software corrections, and known problems. It also describes any
`changes to the documentation.
`
`- CoreBui/der 3500 Quick /nsta//ation Guide
`
`Quick reminders and information for system installation. For greater
`detail on installation procedures, see the CoreBui/der 3500 Getting
`Started Guide.
`
`- CoreBui/der 3500 Getting Started Guide
`
`All the procedures necessary for getting your system up and running,
`including information on installing, cabling, powering up, configuring,
`and troubleshooting the system.
`
`I CoreBui/der 3500 Command Quick Reference
`
`All of the Administration Console commands for the system.
`
`- Web Management User Guide for the CoreBui/der 3500
`
`Overview, installation, and troubleshooting information for the suite
`of applications that help you manage your system over the Internet.
`
`24
`
`24
`
`

`
`CoreBuilder 3500 Documentation
`
`25
`
`In addition, each module and field—replaceab|e component contains a
`guide:
`CoreBuilder 3500 System Processor Removal and Replacement Guide
`
`Provides overview information and removal and replacement
`instructions for the CoreBuilder system processor.
`
`Module Installation Guides
`
`An overview, LED status information, and installation instructions for
`each module.
`
`GBIC Transceiver Installation Guide
`
`Installation instructions for the Gigabit Ethernet Interface Converter
`transceiver.
`
`CoreBuilder 3500 Power Supply Assembly Removal and Replacement
`Guide
`
`Overview information and removal and replacement instructions for
`the CoreBuilder power supplies.
`
`CoreBuilder 3500 Fan Tray Removal and Replacement Guide
`
`Overview information and removal and replacement instructions for
`the fan tray.
`
`PC/I/ICIA Flash Card User Guide
`
`Information on using the PCIVICIA card to save and restore system
`configuration settings.
`
`Blank Faceplate Installation Guide
`
`Instructions for covering empty slots with the blank faceplate.
`
`25
`
`25
`
`

`
`‘ 26
`
`ABOUT THIS Guroe
`
`Software and
`Documents on
`CD—ROM
`
`The compact disc that comes with your system contains:
`
`I System software
`
`in: Online versions of the paper guides that are shipped with your system,
`modules, and field—replaceable components
`
`- CoreBui/der 3500 Implementation Guide (this guide)
`
`I Multiplatform Command Reference Guide
`
`Information about the commands used to configure the system. This
`guide documents commands for the CoreBuilder 3500 as well as
`other 3Com systems.
`
`- Help system for the Web Management suite of applications
`
`Online Help system for the CoreBuilder 3500 Web Management
`software. See the Web Management User Guide for information
`about Web Management and the related Help system.
`
`Documentation
`Comments
`
`Your suggestions are very important to us. They help us to make our
`documentation more useful to you.
`
`Please send email comments about this guide to:
`
`sdtechpubs_comments@ne.3com.com
`
`Please include the following information when commenting:
`
`- Document title
`
`I Document part number (found on the inside title page of this guide)
`
`- Page number
`
`Exa mp le:
`
`CoreBuilder 3500 /mp/ementation Guide
`
`Part Number 70013506
`
`Page 25
`
`Year 2000
`
`Compliance
`
`For information on Year 2000 compliance and 3Com products, visit the
`3Com Year 2000 Web page:
`
`http://www.3com.com/products/yr2000.html
`
`26
`
`26
`
`

`
`CONFIGURATION OVERVIEW
`
`
`
`This chapter provides the configuration procedure for the first time that
`you install a CoreBuilder® 3500 Layer 3 High—Function Switch.
`
`E
`
`To upgrade the software on an existing switch, see the Software
`Installation and Release Notes for configuration information.
`
`System
`Configuration
`Procedure
`
`Software is installed on each system at the factory. Because the software
`boots from flash memory when you power on the system, the system is
`immediately ready to configure according to your network needs.
`
`3Com recommends that you use the following procedures the first time
`that you set up your system and every time that you modify its
`configuration.
`
`Procedure Summary
`
`These steps are described in detail in the next section:
`
`Establish management access.
`
`Choose a subsequent management access method.
`
`Choose a subsequent management interface.
`
`Configure parameters related to the network infrastructure. These
`include system, bridge—wide and bridge—port, Ethernet, FDDI, and
`trunking parameters.
`
`Define all VLANs.
`
`Define routing protocol interfaces and set related parameters.
`Configure more advanced traffic control features, such as packet filters
`and Quality of Service (QoS).
`
`Monitor the system and analyze network activity.
`
`These steps are described in detail in the next section.
`
`27
`
`27
`
`

`
`I 28
`
`CHAPTER 1: CONFIGURATION OVERVIEW
`
`Configuration
`Procedure
`
`Follow the steps that apply to your network needs and ignore the steps
`that do not apply.
`
`1
`
`Establish management access.
`
`To perform configuration or management tasks, you must initially:
`
`a Connect to the system through its terminal serial port or modern serial
`port.
`
`For information about the required settings for the serial ports, see
`Chapter 2 in this guide.
`
`b Use the Administration Console as the management interface.
`
`The Administration Console is a menu—driven command line interface
`
`that is embedded in the system software. For specific menu and
`command information, see the Command Reference Guide.
`
`Choose a subsequent management access method.
`
`You can continue to access your system through a local serial connection,
`or you can use one of two other local access methods — any in—band
`port on a media module or the out—of—band 1OBASE—T port on the system
`processor module. To manage the system through either access method,
`you must first configure an IP address:
`
`- To configure an IP address for an out-of-band port — Using the
`serial port connection from step 1, configure an IP address through
`the management
`ip interface menu. For more information, see
`Chapter 2.
`
`- To configure an IP address for an in-band port — Using the serial
`port connection from step 1, configure an IP address by defining an IP
`VLAN (through the bridge vlan menu; see Chapter 9) and an
`associated IP interface (through the ip interface menu; see
`Chapter 11).
`
`28
`
`28
`
`

`
`System Configuration Procedure
`
`3 Choose a subsequent management interface.
`
`After you configure an IP address, you have additional management
`interface options:
`Administration Console —— You can now access this interface from a
`remote Telnet connection.
`
`Web Management software ~ From your Web browser, you can
`access a suite of HTl\/lL~based applications that are embedded in the
`software. For more information, see the Web Management User
`Guide.
`
`SNMP-based applications - One example is 3Com Transcend®
`Network Control Services software. To manage the system in—band
`from SNMP-based applications, set the SNMP parameters through the
`snmp m