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S
PANNING
T
REE
C
OMMANDS
4-220
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 - 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 4-212) 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 III 10/100 1
- Management Guide 3
- APPENDICES: 21
- NTRODUCTION 31
- Table 1-1 Key Features 32
- ESCRIPTION 33
- System Defaults 37
- ONNECTING 43
- Remote Connections 44
- Stack Operations 45
- Basic Configuration 46
- Setting Passwords 47
- Setting an IP Address 47
- Saving Configuration Settings 53
- Managing System Files 54
- CHAPTER 3 57
- CONFIGURING THE SWITCH 57
- AVIGATING 59
- Configuration Options 60
- Main Menu 62
- Line Interface via Telnet.) 70
- Setting the IP Address 75
- Manual Configuration 77
- Using DHCP/BOOTP 78
- System Log Configuration 91
- Remote Log Configuration 93
- Displaying Log Messages 95
- Resetting the System 98
- Configuring SNTP 99
- Setting the Time Zone 100
- Command Attributes 100
- ANAGEMENT 101
- ONFIGURING 102
- Command Usage 106
- Setting the Local Engine ID 109
- Specifying a Remote Engine ID 110
- Configuring SNMPv3 Users 111
- Configuring SNMPv3 Groups 117
- Setting SNMPv3 Views 123
- User Authentication 125
- UTHENTICATION 127
- Configuring the Secure Shell 134
- Generating the Host Key Pair 137
- Field Attributes 137
- Configuring the SSH Server 139
- Displaying 802.1X Statistics 150
- Setting the ACL Name and Type 155
- Configuring a Standard IP ACL 156
- Configuring a MAC ACL 160
- Specifying the Mask Type 163
- Configuring an IP ACL Mask 164
- Configuring a MAC ACL Mask 166
- Command Attributes (Web) 170
- Field Attributes (CLI) 171
- Basic information: 171
- Configuration: 171
- Current status: 172
- ONFIGURATION 175
- Configuring LACP Parameters 181
- Displaying LACP Port Counters 185
- Command Attribute 194
- Showing Port Statistics 195
- Figure 3-61 Port Statistics 200
- Power Over Ethernet Settings 201
- LGORITHM 211
- VLAN Configuration 235
- Assigning Ports to VLANs 236
- Displaying Current VLANs 241
- Command Attributes (CLI) 242
- Creating VLANs 242
- Private VLANs 250
- Configuring Private VLANs 253
- Associating Community VLANs 254
- Selecting the Queue Mode 262
- Mapping IP Precedence 265
- Mapping DSCP Priority 267
- Mapping IP Port Priority 269
- Copy Settings 271
- Mapping CoS Values to ACLs 272
- Multicast Filtering 276
- ULTICAST 277
- ILTERING 277
- Figure 3-105 Configuring DNS 287
- Web – Select DNS, Cache 291
- Accessing the CLI 293
- Console Connection 293
- Telnet Connection 294
- Keywords and Arguments 295
- Minimum Abbreviation 296
- Command Completion 296
- Getting Help on Commands 296
- Showing Commands 296
- NTERFACE 297
- Partial Keyword Lookup 298
- Using Command History 298
- Understanding Command Modes 298
- Exec Commands 299
- Configuration Commands 300
- Privileged Exec mode 301
- Command Line Processing 302
- Command Groups 303
- Line Commands 305
- Console(config)#line console 306
- Console(config-line)# 306
- General Commands 317
- Console> enable 318
- Console# 318
- Console#disable 318
- Console> 318
- System Management Commands 323
- Device Designation Commands 324
- User Access Commands 326
- IP Filter Commands 329
- Web Server Commands 331
- Telnet Server Commands 335
- Secure Shell Commands 336
- Console#show ssh 345
- Event Logging Commands 348
- Table 4-18 Logging Levels 350
- SMTP Alert Commands 356
- Time Commands 360
- System Status Commands 367
- Related Commands 370
- Flash/File Commands 373
- Console#delete test2.cfg 378
- Column Heading Description 379
- Power over Ethernet Commands 382
- Console(config-if)# 386
- Command Mode 388
- Privileged Exec 388
- Authentication Sequence 389
- RADIUS Client 392
- TACACS+ Client 397
- Port Security Commands 399
- 802.1X Port Authentication 402
- Access Control List Commands 411
- IP ACLs 414
- Console(config)# 416
- Queue 0123 428
- Priority 1,2 0,3 4,5 6,7 428
- MAC ACLs 430
- Console(config-mac-acl)# 432
- MAC egress mask ACL: 438
- Priority 1,2 3 4,5 6,7 440
- ACL Information 442
- SNMP Commands 443
- Console(config)#snmp-server 444
- Field Description 455
- Example 461
- Interface Commands 462
- Statistics” on page 3-139 473
- Mirror Port Commands 476
- Rate Limit Commands 478
- Link Aggregation Commands 480
- GGREGATION 482
- (Continued) 489
- Address Table Commands 492
- Spanning Tree Commands 496
- 499
- Console(config-mstp)# 506
- Editing VLAN Groups 522
- Configuring VLAN Interfaces 524
- Displaying VLAN Information 532
- Command Function Mode Page 534
- XTENSION 540
- Priority Commands 545
- Priority Commands (Layer 2) 546
- Priority 1,2 0,3 4,5 6.7 550
- Information of Eth 1/1 552
- IP Precedence Value 01234567 555
- CoS Value 01234567 555
- IGMP Snooping Commands 561
- IP Interface Commands 572
- DNS Commands 578
- Console(config)#clear host * 580
- PECIFICATIONS 587
- Management Features 588
- Standards 589
- Management Information Bases 590
- ROUBLESHOOTING 591
- Using System Logs 593
- Glossary-1 595
- Glossary-2 596
- Glossary-3 597
- Glossary-4 598
- Glossary-5 599
- Glossary-6 600
- Glossary-7 601
- Glossary-8 602
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