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S
PANNING
T
REE
C
OMMANDS
4-225
spanning-tree cost
This command configures the spanning tree path cost for the specified
interface. Use the no form to restore the default.
Syntax
spanning-tree cost cost
no spanning-tree cost cost
cost - The path cost for the port. (Range: 1-200,000,000))
The recommended range is:
- Ethernet: 200,000-20,000,000
- Fast Ethernet: 20,000-2,000,000
- Gigabit Ethernet: 2,000-200,000
Default Setting
• Ethernet – half duplex: 2,000,000; full duplex: 1,000,000;
trunk: 500,000
• Fast Ethernet – half duplex: 200,000; full duplex: 100,000;
trunk: 50,000
• Gigabit Ethernet – full duplex: 10,000; trunk: 5,000
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• This command is used by the Spanning Tree Algorithm to determine
the best path between devices. Therefore, lower values should be
assigned to ports attached to faster media, and higher values assigned
to ports with slower media.
• Path cost takes precedence over port priority.
• When the spanning-tree pathcost method (page 4-217) is set to short,
the maximum value for path cost is 65,535.
Example
Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree cost 50
Console(config-if)#
- TigerStack 10G 1
- Management Guide 4
- NTRODUCTION 29
- Table 1-1 Key Features 30
- ESCRIPTION 31
- System Defaults 35
- Table 1-2 System Defaults 36
- Required Connections 40
- ONNECTING 41
- Remote Connections 42
- Stack Operations 43
- Master Backup Unit 44
- PERATIONS 45
- Basic Configuration 46
- Setting Passwords 47
- Setting an IP Address 48
- Dynamic Configuration 49
- Trap Receivers 52
- Saving Configuration Settings 53
- Managing System Files 54
- AVIGATING 59
- Button Action 60
- Table 3-2 Main Menu 61
- Manual Configuration 75
- Using DHCP/BOOTP 76
- Managing Firmware 78
- Displaying Log Messages 93
- Renumbering the Stack 96
- Resetting the System 97
- Setting the System Clock 98
- Setting the Time Zone 99
- Console(config)# 100
- ANAGEMENT 101
- ONFIGURING 102
- Command Attributes 103
- Setting an Engine ID 107
- User Authentication 114
- Configuring User Accounts 115
- Command Usage 117
- UTHENTICATION 119
- Configuring HTTPS 121
- Configuring the Secure Shell 123
- Generating the Host Key Pair 126
- Field Attributes 126
- Generate 127
- Configuring the SSH Server 128
- Configuring Port Security 130
- Displaying 802.1X Statistics 139
- Access Control Lists 143
- Setting the ACL Name and Type 144
- Configuring a Standard IP ACL 145
- Configuring a MAC ACL 149
- Configuring ACL Masks 151
- Configuring an IP ACL Mask 152
- Configuring a MAC ACL Mask 154
- Port Configuration 158
- Field Attributes (CLI) 159
- Basic information: 159
- Configuration: 159
- Current status: 160
- Creating Trunk Groups 163
- Configuring LACP Parameters 169
- ONFIGURATION 171
- Displaying LACP Port Counters 172
- Counter Information 172
- Configuring Port Mirroring 181
- Configuring Rate Limits 182
- Showing Port Statistics 183
- Table 3-10 Port Statistics 184
- Figure 3-60 Port Statistics 188
- Address Table Settings 190
- Displaying the Address Table 192
- Changing the Aging Time 193
- LGORITHM 195
- Displaying Global Settings 196
- Configuring Global Settings 200
- VLAN Configuration 220
- VA: VLAN Aware 221
- VU: VLAN Unaware 221
- Displaying Current VLANs 225
- Command Attributes (Web) 226
- Command Attributes (CLI) 226
- Creating VLANs 227
- Configuring Private VLANs 236
- Enabling Private VLANs 237
- Configuring Protocol Groups 239
- Mapping Protocols to VLANs 240
- Layer 2 Queue Settings 242
- Selecting the Queue Mode 246
- Layer 3/4 Priority Settings 248
- Mapping IP Precedence 249
- Mapping DSCP Priority 251
- Mapping IP Port Priority 253
- Mapping CoS Values to ACLs 255
- Figure 3-92 ACL CoS Priority 256
- Multicast Filtering 257
- ULTICAST 261
- ILTERING 261
- Command Attribute 263
- Web – Select DNS, Cache 272
- Figure 3-100 DNS Cache 272
- NTERFACE 273
- Telnet Connection 274
- Entering Commands 275
- Showing Commands 277
- Understanding Command Modes 279
- Exec Commands 279
- Configuration Commands 280
- Console#configure 281
- Command Line Processing 282
- Command Groups 283
- Line Commands 285
- Console(config-line)# 289
- General Commands 297
- Console#disable 299
- Console> 299
- Console#!2 301
- Console#config 301
- Console#reload 301
- System Management Commands 303
- Device Designation Commands 304
- User Access Commands 306
- IP Filter Commands 309
- Web Server Commands 311
- Telnet Server Commands 315
- Secure Shell Commands 316
- Console#show ssh 326
- Console# 326
- Event Logging Commands 328
- Table 4-18 Logging Levels 330
- SMTP Alert Commands 337
- Time Commands 342
- System Status Commands 348
- Example 351
- Related Commands 351
- Frame Size Commands 354
- Flash/File Commands 356
- Authentication Commands 363
- RADIUS Client 366
- TACACS+ Client 370
- Port Security Commands 373
- 802.1X Port Authentication 376
- Access Control List Commands 386
- IP ACLs 388
- Command Function Mode Page 389
- Console(config-std-acl)# 391
- Priority 01234567 402
- Queue 12034567 402
- Access-list ALS1 cos 0 403
- Table 4-36 MAC ACL Commands 405
- Console#show mac access-list 409
- MAC access-list jerry: 409
- Console(config-if)# 413
- ACL Information 416
- SNMP Commands 418
- Console(config)#snmp-server 419
- Field Description 433
- DNS Commands 435
- Command Mode 444
- Privileged Exec 444
- Interface Commands 445
- Mirror Port Commands 460
- Rate Limit Commands 462
- Link Aggregation Commands 464
- GGREGATION 465
- Address Table Commands 478
- Spanning Tree Commands 482
- 485
- Console(config-mstp)# 491
- VLAN Commands 507
- Editing VLAN Groups 508
- Console(config)#vlan database 509
- Console(config-vlan)# 509
- Configuring VLAN Interfaces 510
- Displaying VLAN Information 518
- XTENSION 527
- Priority Commands 531
- Priority Commands (Layer 2) 532
- Console(config)#int eth 1/5 535
- Queue 01234567 536
- Priority 20134567 536
- IP Precedence Value 01234567 542
- CoS Value 01234567 542
- Console(config)#map ip dscp 543
- Multicast Filtering Commands 548
- IGMP Query Commands (Layer 2) 552
- IP Interface Commands 559
- PECIFICATIONS 567
- Management Features 568
- Standards 569
- Management Information Bases 570
- Trap (RFC 1215) 571
- UDP MIB (RFC 2012) 571
- ROUBLESHOOTING 573
- Using System Logs 575
- Glossary-1 577
- Glossary-2 578
- Glossary-3 579
- Glossary-4 580
- Glossary-5 581
- Glossary-6 582
- Glossary-7 583
- Glossary-8 584
- Numerics 585
- 38 Tesla 591
- Irvine, CA 92618 591
- Phone: (949) 679-8000 591
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