3Com CoreBuilder 2500

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Chapter 9 Administering VLANs

Chapter 10 Administering IP Routing

Chapter 11 Administering IP Multicast Routing

Chapter 12 Administering IPX Routing

Chapter 13 Administering OSPF Routing

Chapter 14 Administering AppleTalk Routing

ADMINISTERING EXTENDED

WITCHING FEATURES

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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 109

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