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Chapter 8 - Internetworking and Management Overview
124 Campus-REX2 RS Interface Card User Manual
MAC-LEVEL BRIDGING AND SPANNING TREE
P
ROTOCOL
The following sections describe the MAC-level bridge and the Spanning Tree
algorithm function.
About MAC-Level Bridging
A bridge moves information across an internetwork from a source to a
destination at the link layer (of an OSI reference model). The information is
sent to a physical address known as a Media Access Control (MAC) address.
The Campus-REX2 provides transparent Ethernet MAC-level bridging. It is
a completely self-contained bridge with a CPU, memory subsystems (RAM,
Flash, etc.), an Ethernet controller and Ethernet drivers, and other glue logic.
It provides complete main bridging tasks of learning, forwarding, filtering,
and hashing/buffer management. Additionally, it offers 802.1d Spanning
Tree protocol, packet encapsulation (through cHDLC or PPP framing), and
other local tasks.
About Spanning Tree Protocol
Spanning Tree protocol creates a logical topology to overlay a physical
network. This overlay disables all loops in the data path. Enabling Spanning
Tree ensures a unique, primary path from any node on a network to any other
node. Also, if the primary path is lost, Spanning Tree creates a new primary
path by enabling links in the physical network that were previously disabled
in creating the active topology. The following figure shows an example of
Spanning Tree.
- CAMPUS-REX2 RS INTERFACE CARD 1
- VERSION 5.1 1
- FCC NOTICE 3
- USING THIS MANUAL 4
- DOCUMENT CONVENTIONS 4
- Document Conventions 5
- TABLE OF CONTENTS 7
- Table of Contents 10
- Table of Contents 11
- INSTALLING AND 13
- ACCESSING THE REX2 13
- INSTALLING THE CAMPUS-REX2 14
- Guide rail 15
- Campus-REX2 RS 15
- Interface card 15
- Campus-REX2 RS Interface card 16
- CONNECTING THE ETHERNET LINE 17
- Category 5 cable 18
- Black cable 21
- (Category 3) 21
- PairGain 23
- LOGGING IN 24
- Circuit ID: 25
- LOGIN PASSWORD > 25
- REMOTE_LOGON PASSWORD > 27
- LOGGING OFF 28
- USING THE MENUS 28
- OPERATING WITH DEFAULT VALUES 29
- CONFIGURING 31
- HDSL PARAMETERS 31
- CONFIGURING HDSL PARAMETERS 32
- Selecting HDSL Parameters 33
- Using Standard Mode 34
- Using Extended Mode 35
- CONFIGURING HDSL ALARMS 38
- Setting HDSL Alarms 39
- CONFIGURING THE REX2 41
- TATUS SCREEN 42
- Configuring Bridge Features 44
- Viewing Spanning Tree Status 48
- Viewing the Bridge Table 53
- Viewing the ARP Table 54
- Configuring Routing Features 58
- Configuring the IP Addresses 59
- Configuring RIP 61
- Configuring DHCP Services 65
- Accessing the Routing Tables 68
- ANAGEMENT 72
- Entering SNMP Parameters 73
- Configuring Trap Receivers 75
- MANAGING 77
- SYSTEM PARAMETERS 77
- CCESSING SYSTEM CONFIGURATION 78
- SETTING THE TIME AND DATE 79
- SETTING A PASSWORD 81
- RESTORING DEFAULT VALUES 82
- Are You Sure (Y/N) ? y 83
- Hit Any Key to Continue 83
- VIEWING PRODUCT INFORMATION 84
- MONITORING AND TESTING 85
- CAMPUS SYSTEM 85
- MONITORING HDSL PERFORMANCE 86
- Viewing Local Alarm History 91
- VIEWING ETHERNET STATISTICS 92
- Viewing Bridge Statistics 93
- Viewing Router Statistics 95
- PERFORMING TESTS 97
- Performing Loopback Testing 99
- RESETTING THE CAMPUS UNIT 101
- MANAGING SOFTWARE 103
- PGRADING CAMPUS UNIT SOFTWARE 104
- RECOVERING SOFTWARE 107
- MANAGEMENT 109
- USING THE LCD FOR 109
- CONFIGURATION 109
- NAVIGATING THE LCD MENUS 110
- SETTING THE HDSL PARAMETERS 111
- Configuring Standard Mode 112
- CONFIGURING THE CAMPUS-REX2 115
- Configuring REX2 Parameters 116
- Setting the Encapsulation 117
- Setting Bridge Configuration 118
- Setting Router Configuration 119
- Saving the REX2 Configuration 120
- IEWING AND CONFIGURING ALARMS 121
- Configuring Alarm Thresholds 122
- Local Alarms 123
- Remote Alarms 124
- CONFIGURING LOOPBACKS 125
- Initiating a Loopback 126
- Clearing a Loopback 126
- Setting the Loopback Timeout 126
- VIEWING SYSTEM INFORMATION 127
- VIEWING STATUS INFORMATION 127
- PORT STATISTICS 128
- Bridge Port Statistics 129
- Router Port Statistics 130
- INTERNETWORKING AND 131
- MANAGEMENT OVERVIEW 131
- APPLICATION 133
- Point-to-Point LAN Extension 134
- LAN Connections Over a WAN 135
- About MAC-Level Bridging 136
- About Spanning Tree Protocol 136
- Example Physical Network* 137
- Loop-free Topology 137
- Using Spanning Tree Protocol 137
- IP ROUTING 138
- Dynamic Routing 141
- Campus-REX2 IP Addresses 141
- Internet 143
- MANAGEMENT PROTOCOLS 144
- MIB AND TRAP SUPPORT 145
- ENCAPSULATION PROTOCOLS 147
- RODUCT COMPATIBILITY 148
- TECHNICAL REFERENCE 151
- DEFAULT SETTINGS 152
- ETHERNET PORT 153
- STANDARDS 153
- ABBREVIATIONS 155
- Appendix B - Abbreviations 156
- CONTACTING ADC 157
- Appendix D - Contacting ADC 158
- Numerics 159
- ART NUMBER: 1269224 166
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