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Overview of the P220 Gigabit Switch Family
Cajun P550/P220 Switch Operation Guide 2
-
7
Figure 2-3. Trunking Translation
Dual Layer Spanning Trees
Spanning trees are an IEEE 802.1 standard which provides distributed routing over
multiple LANs connected by bridges.
There are three spanning tree models:
❒
Single IEEE 802.1D spanning tree
❒
Spanning tree per VLAN
❒
Optimized “per-VLAN” spanning trees using a scalable, two-layer spanning tree
approach
Note:
All models interoperate with legacy IEEE 802.1D bridges and switches.
Dual layer spanning trees provide two very important capabilities:
❒
Smaller spanning tree domains means much faster convergence during spanning
tree reconfiguration.
❒
Per-VLAN operation enables you to use more of the available bandwidth when you
have redundant links. A particular link can be blocked on one VLAN, but still
forward packets on another.
Frame
Format:
•“Clear”
•IEEE
802.1Q
•Multilayer
•3Com
Translation Function
Translation Function
Frame Format:
“Normal” - Ethernet
or 802.3 with valid
CRC
Trunking Translation:
Frame
Format:
•“Clear”
•IEEE
802.1Q
•Multilayer
•3Com
- Cajun™ P550/P220™ 1
- Switch Operation 1
- Guide Version 4.0 1
- Contents 4
- Documentation Feedback 13
- Online Documentation 13
- Conventions 16
- Audience 17
- Overview of The Contents 17
- Related Documents 18
- Terminology 19
- Cajun P550 Switch Overview 21
- Layer 2 Supervisor Module 22
- Layer 3 Supervisor Module 23
- Media Modules 24
- Cajun P550 Switch Features 25
- Crossbar Switch Fabric 26
- Cajun Routing Overview 27
- Virtual Bridging Functions 28
- VLAN Functions 29
- Hunt Groups 30
- OpenTrunk Technology 31
- Spanning Tree Models 32
- Extensive Fault Tolerance 33
- Buffer and Queue Management 34
- Web-Based Management 34
- Cajun P550 Switch Modules 35
- Overview of the P220 Gigabit 37
- Switch Family 37
- Switch Features 38
- 22.88 Gb/s 39
- Dual Layer Spanning Trees 43
- Configuring the Cajun P550 47
- Logging In to the Web Agent 52
- Setting Up User Accounts 52
- Configuring VTP Snooping 64
- Configuring Fast Start Mode 67
- Setting Up SNMP Communities 69
- Connecting a Modem 71
- Switch and Modem 72
- Enabling SNTP 79
- Setting Summer Time Hours 80
- Setting the System Clock 85
- Installing Redundant Hardware 88
- Replacing an Element 90
- Managing Configuration Files 91
- Copying Configuration Files 92
- Copying Files 93
- Parameter Description Options 94
- Configuring IPX Routing 97
- IPX Datagram Structure 98
- Configuring IPX Interfaces 100
- Creating IPX Static Routes 102
- Deleting IPX Static Routes 103
- Modifying IPX Static Routes 103
- Creating IPX Static Services 103
- Deleting IPX Static Service 104
- Modifying IPX Static Services 105
- Searching the IPX Route Table 106
- Examining the IPX Route Table 107
- Statistic Defines the 111
- Configuring IPX RIP Protocol 113
- (Layer 3) 113
- Parameter Allows you to 115
- Parameter Definition 118
- Configuring IPX SAP Protocol 119
- Creating IPX SAP Filters 120
- Overview 127
- Configuring IP Global Routing 127
- Creating an IP Interface 128
- Enabling IP Routing 130
- IP Multinetting 133
- Configuring Access Lists 134
- Activating Access Lists 139
- Creating IP Static Routes 140
- Creating Static ARP Entries 140
- IP Multicast 141
- Configuring IGMP 142
- Modifying IGMP Interfaces 143
- Configuring DVMRP 144
- Searching the IP ARP Cache 152
- IP Multicast Statistics 153
- Configuring VRRP 168
- Enabling VRRP 169
- Enabling VRRP on an Interface 169
- Displaying VRRP Statistics 170
- Configuring IRDP 171
- Enabling IRDP on an Interface 172
- Configuring LDAP 174
- Viewing LDAP Statistics 176
- Creating an IP Helper Address 177
- Deleting an IP Helper Address 178
- Configuring the RIP Routing 179
- Protocol (Layer 3) 179
- Modifying RIP Interfaces 180
- Interpreting RIP Statistics 182
- Configuring the OSPF Routing 183
- Creating OSPF Areas 185
- Deleting OSPF Areas 185
- Modifying OSPF Areas 186
- Modifying OSPF Interfaces 186
- Creating OSPF Virtual Links 187
- Deleting OSPF Virtual Links 188
- Modifying OSPF Virtual Links 189
- Creating OSPF Summaries 189
- Deleting OSPF Summaries 190
- Modifying OSPF Summaries 190
- Displaying OSPF Statistics 190
- Displaying OSPF Links 192
- Displaying OSPF Neighbors 192
- Viewing LSA Details 197
- Configuring AppleTalk Routing 200
- Editing AppleTalk Interfaces 202
- Viewing AppleTalk Statistics 209
- Parameter Number of 210
- Monitoring and Configuring 217
- Using VLANs, Spanning Tree 223
- Layer 3) 223
- Forwarding Rules 224
- Egress Rules 224
- Port-Based VLANs 224
- VLAN Considerations 225
- Creating a VLAN 225
- Configuring VLAN Parameters 226
- Creating 3Com Mapping Tables 227
- Assigning Ports To VLANs 228
- Spanning Tree Bridge Options 229
- Managing Spanning Trees 229
- Switches 233
- Hunt Group Considerations 234
- Configuring Hunt Groups 234
- Viewing Hunt Group Members 235
- Adding Ports to a Hunt Group 236
- Tuning Your Switch 237
- Managing Buffers and Queues 238
- Managing Address Forwarding 241
- Parameter Defines the 245
- Managing Intelligent 247
- IGMP Snooping 248
- LGMP Server 249
- LGMP Client 249
- CGMP Snooping 249
- Displaying Router Ports 252
- Creating Static Client Ports 257
- Deleting Static Client Ports 257
- Configuring the LGMP Server 258
- Layer 3 Supervisor 268
- Layer 2 Supervisor 268
- Checking Active Alarms 269
- Using the Event Subsystem 269
- Viewing Event Statistics 272
- Setting Log Size 273
- Statistic Indicates Actions 278
- Setting Up a Mirror Port 282
- Downloading the Image 286
- Resetting the Switch 288
- FCC Notice 289
- Supported MIB Groups 291
- Standard MIB 292
- Private MIB 292
- OSPF Version 2.0 293
- IP Interface 293
- IP Version 4.0 and Services 294
- IP Forwarding/Route Table 294
- AppleTalk 295
- IP Access List 295
- Numerics 297
- 10 Index 306
- Index 11 307
- 12 Index 308
- Index 13 309
- 14 Index 310
- Index 15 311
- 16 Index 312
- Index 17 313
- 18 Index 314
- Index 19 315
- 20 Index 316
- Index 21 317
- 22 Index 318
- Index 23 319
- 24 Index 320
- Index 25 321
- 26 Index 322
- Index 27 323
- 28 Index 324
- Index 29 325
- 30 Index 326
- Index 31 327
- Index 33 329
- 34 Index 330
- Index 35 331
- 36 Index 332
- Index 37 333
- 38 Index 334
- Index 39 335
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