3Com CoreBuilder 7000 User manual

http://www.3com.com/
CoreBuilder®7000 Family
ATM Switches
Operations Guide
Software Version 4.55 Base and Extended
Part No. DOA3700-0AAA02
Published January 2000

ii
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Guide written by Laura Novich. Edited by Debbie ZIoni. Illustrated by Pearl Goldberg.

CONTENTS
ABOUT THIS GUIDE
Finding Specific Information in This Guide 14
Conventions 14
Documentation 15
CoreBuilder 7000 Family ATM Switch Documents 16
Related Documents 16
Documentation Road Map 17
Documentation Comments 18
Year 2000 Compliance 18
1ATM NETWORK BASICS
ATM Overview 19
ATM Cell Structure 20
Advantages of Using Fixed-Length Cells 20
ATM Layers 21
Physical Layer 22
ATM Layer 22
ATM Adaptation Layer (AAL) 22
Functional Planes 22
User Plane 23
Control Plane 23
Management Plane 23
Designing ATM Networks 24
ATM Network Examples 24
Classical IP ATM Networks 24
LAN Emulation ATM Networks 27
2NETWORK INTERFACE MANAGEMENT
Network Interfaces 35
User Network Interface 36
Network Network Interface 36

Integrated Local Management Interface (ILMI) 36
ILMI Management Information Base (MIB) 37
ATM Interface Management Entity (IME) 37
Basic ILMI Functions 38
Status Information 38
UNI Address Registration 38
Access to Service Registry MIB 41
ILMI Connectivity Polling 41
Automatic Configuration Procedures 42
Auto-Discovery 43
Auto-Configuration 48
Modification of Local Attribute 50
Configuring a Port on Change of Attachment 51
3E-IISP PROTOCOL
Introducing Enhanced Interim InterSwitch Protocol (E-IISP) 53
IISP vs. E-IISP 53
Features of E-IISP 54
Hierarchy in an E-IISP Network 55
Hierarchical ATM Addressing 55
Configuring Network ATM Addresses 58
Auto-Discovery 58
Auto-Configuration 58
Static Address Registration in E-IISP 58
Planning a Network with E-IISP 58
Hierarchical Topology 59
E-IISP Hierarchical Routing Algorithm 60
Hop Limit — Avoiding Loops 62
Crankback 62
Alternate Routes 63
Load Balancing 65
LANE Redundancy 66
4PRIVATE NETWORK-TO-NETWORK INTERFACE (PNNI) VERSION
1.0
Introducing PNNI
Version 1.0 67

Features of PNNI 68
Advantages of Implementing a PNNI Network 69
When to Use PNNI 69
PNNI vs. E-IISP 69
PNNI Routing 71
Organizing a Network Hierarchy 71
Peer Group Leader 74
One Node’s View of the Network 76
Information Exchange in PNNI 77
Peer Group Leader Elections 80
Uplinks in a Hierarchical Structure 83
Configuring the PNNI Network 84
ATM Address Format 84
Path Selection 85
Configuring the CoreBuilder 7000 for PNNI 86
PNNI Signaling Protocol 87
PNNI Signaling 87
Establishing a Channel in PNNI with a Flat Network 88
Alternate Routing and Crankback 89
Establishing a Channel in a Hierarchical Network 91
Alternate Routing and Crankback 93
5ESTABLISHING ATM CHANNELS
Virtual Channels 97
Local Links and Connections 97
External Links – ATM Connections 99
Internal Link — Switch Matrix 99
Virtual Path — Channel Hierarchy 99
Switched Virtual Channels 100
Permanent Virtual Channels 100
VP Tunneling 101
Configuring VP Tunnels 102
VP Tunneling through a WAN VP Switch 102
Virtual UNI 104
Signaling — External Links 104
Signaling Protocol 105
Signaling Messages 105

SETUP Message 106
CALL-PROCEEDING Message 106
CONNECT Message 107
ADD PARTY Message 107
Signaling Protocol Profile 107
Establishing a Virtual Channel 108
Point-to-Point Calls 108
Point-to-Multipoint Calls 109
Displaying Connections 109
Signaling Sequences 109
Signaling Timers 111
Timer Resolution 113
Signaling AAL 114
SSCOP 114
SSCOP Timers 115
SSCOP Configuration Parameters 116
Managing Signaling Protocol Parameters 116
Call Admission Control 117
GCAC Algorithm 117
UNI Signaling 4.0 Features 120
ATM Anycast Capability 120
Signaling of Individual QoS Parameters 121
Message Conversion Between Signaling Protocols 122
Quality of Service Parameters 122
Available Bit Rate Service Class Category 122
Constant Bit Rate Service Class 124
Real-Time Variable Bit Rate Service Class 124
Non-Real-Time Variable Bit Rate Service Class 124
Unspecified Bit Rate Service Class 125
Routing — Internal Links 125
E-IISP Hierarchic Routing Algorithm 125
Hop Limit — Avoiding Loops 127
Crankback 127
Physical-Link Failure Indicator 128
Link Failure 128
Link Failure Detection 129
Link-Failure Detection Sensitivity Control 129

6ATM SWITCHING
ATM Switching 132
Traffic Statistics 134
General Switch Statistics 134
Physical Statistics 134
ATM Statistics 134
AAL5 Control Statistics 134
Signaling Statistics 134
IFC Communications Statistics 134
Traffic Management 135
Frame Discard Capability 135
EFCI 135
7LAN EMULATION VERSIONS 1.0 AND 2.0
LAN Emulation Overview 137
Emulated LAN Components 138
LAN Emulation Client (LEC) 139
LAN Emulation Server (LES) 140
Broadcast and Unknown Server (BUS) 140
LAN Emulation Configuration Server (LECS) 140
Configuring LANE Into Your Network 141
Emulated LAN Connections 141
Control VCCs 141
Data VCCs 142
Frame Ordering 143
Operation of the LAN Emulation 144
Connecting a LEC to an ELAN 144
Registration 145
Address Resolution 146
Connection Management 146
LAN Emulation in the CoreBuilder 7000 146
Default ELAN Parameters 146
Connecting a LEC to an ELAN 147
LECS Address Access 148
Address Resolution 150
Configuring LES LE_ARP Policies 151
Unknown, Multicast and Broadcast Frames 152

LAN Emulation Statistics Display 152
LAN Emulation Redundancy 153
LANE Services in the CoreBuilder 7000 Family ATM Switch Card 154
Redundant LANE Services 154
LECS Redundancy Facility - Configuring the LECS-Order Database 154
LES Redundancy Facility - Configuring the ELAN Topology
Database 155
Selecting LAN Emulation Redundancy Mode 159
LANE Redundancy Start-up Delay 160
LANE Redundancy Limitations 160
LANE Redundancy Planning 160
LANE Security 161
General Concepts 162
Security Algorithm 164
Factory Default Configuration 164
LMA Security Commands 165
LANE Version 2.0 166
Improved Features 166
Multi Protocol over ATM (MPOA) 167
Quality of Service (QoS) 167
New Well-known LECS Address 167
Local Segment ID 167
Selective Multicast Groups 168
New ELAN ID 168
New Frame Size 168
LLC Multiplexing for the Data Direct VCC 168
Backward Compatibility and Mixture of LECs of Both LANE Versions 1.0
and 2.0 170
Moves of Nodes 170
Verify Request and Response 170
MPOA Devices Configuration 171
Display Current MPS Configuration 171
Set Keep-Alive Time 172
Set Keep-Alive Lifetime 172
Set Internetwork Layer Protocols 173
Set Initial Retry Time 174
Set Retry Time Maximum 175
Set Give Up Time 175

Set Default Holding Time 176
Display Current MPC Configuration 177
Set Shortcut Setup Frame Count 178
Set Shortcut Setup Frame Time 179
Set Flow Detection Protocols 180
Set Initial Retry Time 181
Set Retry Time Maximum 182
Set Hold Down Time 182
8VIRTUAL NETWORKS
Virtual LAN Basics 185
VLANs in the CoreBuilder 7000 187
Admin and Default VLANs 188
VLANs in a CoreBuilder 7600 Card 189
Virtual LANs for Three Workgroups 192
9DEVICE MANAGEMENT
Overview 193
Local Management Application (LMA) 193
Communication Methods 194
Security 194
SNMP Agent 195
Management Information Base (MIB) 195
SNMP Traps 195
Managing by SNMP 196
Out-of-Band Access 196
Security 197
Chassis Management — Single IP 197
Single SNMP Agent 198
Compatibility with Previous Versions 200
RMON History 201
Ethernet Encapsulation Type 204
Service Console 205
10 SWITCH REDUNDANCY
Switch Redundancy Overview 207

Summary of Improved Switch Redundancy Features in Version 4.5 207
System Requirements 209
Version 4.5 Features 210
Identifying the Active Switching Module 210
Conditions for Switch-over to Redundant Module 210
Switch-over Reboot 210
Communications between Active and Redundant Switches 210
210
Switching Module Configuration Database 211
LES and LECS in One CoreBuilder 7000 211
Alias Names 211
Management Operations 211
Upgrading the Software 211
Switch Redundancy Limitations 212
Up to Version 4.0 Features 212
Identifying the Active Switching Module 212
Conditions for Switch-over to Redundant Module 212
Switch-over Phases 213
Switching Module Configuration Database 213
Information Based on the MAC Address 214
LES and LECS in One CoreBuilder 7000 215
LES and LECS in Different CoreBuilder 7000s 215
Alias Names 215
Resetting to Factory Defaults 215
Upgrading the Software 215
Switch-over Example in CoreBuilder 7000 216
AT
ECHNICAL SUPPORT
Online Technical Services 217
World Wide Web Site 217
3Com Knowledgebase Web Services 217
3Com FTP Site 218
3Com Bulletin Board Service 218
3Com Facts Automated Fax Service 219
Support from Your Network Supplier 219
Support from 3Com 219
Returning Products for Repair 221