3Com CoreBuilder 2500

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III

Chapter 3 Bridging and Routing in the CoreBuilder 2500 System

Chapter 4 Routing with IP Technology

Chapter 5 Routing with IP Multicast

Chapter 6 Routing with IPX

Chapter 7 Routing with OSPF

Chapter 8 Routing with AppleTalk

ABOUT ROUTING PROTOCOLS

Main Page

User Guide1
Table of Contents3
Introduction15
About this Guide15
How to Use this Guide16
Conventions16
Year 2000 Compliance17
Corebuilder 2500 Documentation18
- Paper Documents18
Documentation Comments19
- Documents on the Web19
- Documents on CD19
- Getting Started21
Using Menus24
- Switching Features25
- Types of Vlans33
About Vlans33
- Application-Oriented Vlans34
- MAC Address Group Vlans34
- Port Group Vlans34
- Corebuilder 2500 Protocol-Sensitive VLAN Conﬁguration35
- Protocol-Sensitive Vlans35
- Protocol Suite35
- Layer 3 Addressing Information36
- Switch Ports36
- Flooding Decisions in the Corebuilder 250037
  - Modifying the Default VLAN37
- Default VLAN37
- VLAN Exception Flooding38
- Overlapped IP Vlans39
- Routing between Vlans40
- VLAN Conﬁguration Examples41
What Is Routing?45
- Traditional Bridging and Routing48
Bridging and Routing Models48
- Corebuilder 2500 Bridging and Routing50
IP Routing and the OSI Reference Model53
Elements of IP Routing54
- IP Addresses54
  - Subnetwork Part55
  - Network Part55
- Router Interfaces56
- Routing Table57
  - Default Route58
- Address Resolution Protocol (ARP)59
IP Routing Transmission Errors60
Routing with Classical IP over ATM61
- About Logical IP Subnets (Liss)61
  - Forwarding to Nodes Within a LIS62
- ATM ARP Servers62
IP Routing References63
About IP Multicast Routing65
Igmp66
Dvmrp66
- Mbone66
Multicast Routing Algorithms67
- Spanning Tree67
- Flooding67
- Reverse Path Forwarding68
- Pruning68
- Time-To-Live (TTL) Threshold69
Multicast Interfaces69
- DVMRP Metric Value69
Multicast Tunnels69
- Rate Limit69
IPX Routing in the Netware Environment71
- Routing Information Protocol (RIP)71
- Service Advertising Protocol (SAP)71
- Internet Packet Exchange (IPX)71
How IPX Routing Works74
- IPX Packet Format74
- IPX Packet Delivery75
Elements of IPX Routing77
- Routing Tables78
  - Generating Routing Table Information79
- Service Advertising Protocol in IPX80
Elements of OSPF Routing87
- Autonomous Systems87
- Areas87
  - Area Border Routers88
  - Routing Databases89
- Neighbors90
- Protocol Packets91
- Router Types91
- Stub Default Metrics95
  - Dead Interval95
- Virtual Links95
  - Password95
- Electing the Backup Designated Router96
- Establishing Adjacencies96
How OSPF Routing Works96
- Finding Neighbors96
- Starting up96
- Electing the Designated Router97
- Routing Packets98
About Appletalk99
- Appletalk Networks100
- Appletalk Nodes100
- Appletalk Zones100
  - Named Entities100
Appletalk Network Elements99
Appletalk Protocols102
- Seed Routers102
- Transport Layer Protocols103
- Physical Layer Protocols103
- Network Layer Protocols103
- Link Layer Protocols103
- Session Layer Protocols106
About AARP108
Displaying VLAN Information111
Deﬁning VLAN Information113
Modifying VLAN Information114
- From the Top Level of the Administration Console, Enter115
- Removing a VLAN Deﬁnition115
- Administering Ip Routing117
- Administering Interfaces118
- Interface Characteristics118
- IP LIS Interfaces118
- IP VLAN Interfaces118
- Displaying Interfaces119
- Adding a Permanent Virtual Circuit (PVC)123
- Removing a Permanent Virtual Circuit (PVC)123
  - Administering Routes124
  - Deﬁning a Static Route125
- Displaying the Routing Table125
- Flushing a Route126
- Removing a Route126
- Setting the Default Route126
- Removing the Default Route127
Administering the ARP Cache127
- Displaying the ARP Cache127
- Removing an ARP Cache Entry128
- Flushing the ARP Cache128
- Deﬁning an ATM ARP Server129
Administering ATM ARP Servers129
- Displaying ATM ARP Servers129
- Displaying the ATM ARP Cache130
- Removing an ATM ARP Server130
- Removing an ATM ARP Cache Entry131
- Flushing the ATM ARP Cache131
Administering UDP Helper131
- Deﬁning a Port and IP Routing Address132
- Displaying UDP Helper Information132
- Removing a Port Number and IP Routing Address132
- Setting the BOOTP Hop Count Limit133
- Setting the BOOTP Relay Threshold133
- Conﬁguring Overlapped Interfaces134
Enabling and Disabling IP Routing134
- Displaying the RIP Interface Conﬁguration135
- Conﬁguring RIP135
Enabling and Disabling ICMP Router Discovery135
- Setting the RIP Interface Cost136
Setting the RIP Mode136
- Adding an RIP Advertisement Address137
- Setting the Poison Reverse Mode137
- Removing an RIP Advertisement Address138
- Displaying RIP General Statistics138
Pinging an IP Station139
Displaying IP Statistics140
Enabling and Disabling DVMRP145
Enabling and Disabling IGMP146
Administering IP Multicast Interfaces147
- Multicast Interface Characteristics147
- Displaying Multicast Interfaces147
- Disabling Multicast Interfaces148
- Enabling Multicast Interfaces148
Administering Multicast Tunnels149
- Displaying Multicast Tunnels149
- Deﬁning a Multicast Tunnel150
- Removing a Multicast Tunnel150
Displaying Routes151
Displaying the Multicast Cache152
- Administering Interfaces156
- Deﬁning an Interface157
- Displaying IPX Interfaces157
- Administering Routes158
- Modifying an Interface158
- Removing an Interface158
  - Deﬁning a Static Route159
  - Displaying the Routing Table159
Administering Servers160
- Flushing Routes160
- Removing a Route160
- Deﬁning a Static Server161
- Displaying the Server Table161
Setting IPX Forwarding162
- Removing a Server162
- Flushing Servers162
- From the Top Level of the Administration Console, Enter163
- Setting the RIP Mode163
Setting the Enhanced RIP Mode163
Setting RIP Triggered Updates164
Setting the SAP Mode164
Displaying Statistics165
- Displaying IPX RIP Statistics166
- Displaying IPX SAP Statistics167
- Displaying IPX Forwarding Statistics168
Setting SAP Triggered Updates165
- Displaying IPX Summary Statistics165
Administering Areas169
- Deﬁning Areas170
- Displaying Areas170
- Modifying Areas171
- Removing Areas171
- Adding Network Ranges172
- Modifying Network Ranges172
- Displaying Default Route Metrics173
Setting the Default Route Metric173
- Removing Network Ranges173
  - Deﬁning Default Route Metrics174
  - Conﬁguring OSPF Interfaces174
- Removing Default Route Metrics174
- Displaying OSPF Interface Information175
- Displaying OSPF Interface Statistics176
- From the Top Level of the Administration Console, Enter176
- Setting Modes178
- Setting Priorities179
- Setting Area Ids179
- Setting Transmit Delays180
- Setting Costs180
- Setting Retransmit Timers181
- Setting Hello Timers181
- Setting Dead Intervals182
- Setting Passwords182
Displaying the Link State Database183
- Displaying a Database Summary183
- Displaying Router Lsas184
- Displaying Network Lsas186
- Displaying Summary Network Lsas187
- Displaying External Network Lsas188
Administering Neighbors189
- Displaying Neighbors189
- Removing Neighbors190
- Adding Neighbors190
Setting OSPF Router Ids191
Administering Memory Partitions192
- Displaying Memory Partitions192
- Modifying Memory Partitions192
- Deﬁning Stub Default Metrics193
Administering Stub Default Metrics193
- Displaying Stub Default Metrics193
- Removing Stub Default Metrics193
- Deﬁning Virtual Links194
Administering Virtual Links194
- Displaying Virtual Links194
- Modifying Virtual Links195
- Removing Virtual Links195
Displaying OSPF Statistics196
Administering Interfaces197
- Displaying Appletalk Interfaces198
Administering Routes200
- Flushing All Routes201
Administering the AARP Cache202
- Displaying the AARP Cache202
- Removing an Address from the Cache203
- Flushing All Cache Entries204
Displaying the Zone Table204
- Conﬁguring Forwarding206
- Conﬁguring Checksum206
Pinging an Appletalk Node207
- Displaying RTMP Statistics209
- Displaying ZIP Statistics210
- Displaying NBP Statistics212
Viewing Appletalk Statistics207
- Displaying DDP Statistics207
Remote Monitoring (Rmon)215
Overview215
RMON Beneﬁts216
RMON in the Corebuilder 2500216
RMON Groups217
- Statistics and Axfddistatistics Groups218
- History and Axfddihistory Groups219
- Alarm Group219
  - Setting Alarm Thresholds220
  - RMON Hysteresis Mechanism221
- Hosttopn Group222
- Matrix Group222
- Event Group222
- Host Group222
Com Transcend RMON Agents223
RMON Management Information Base (MIB)224
- MIB Objects224
- Part VI Appendix229
Online Technical Services229
- World Wide Web Site229
- Technical Support229
- Com Bulletin Board Service230
  - Access by Analog Modem230
- Com FTP Site230
Support from Your Network Supplier231
- Comfacts Automated Fax Service231
  - Access by Digital Modem231
Support from 3Com231
Returning Products for Repair233

3Com CoreBuilder 2500 - Page 43

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