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WS-C2950G-48-EI - Catalyst 2950G 10/100 Switch
Cisco WS-C2950G-48-EI - Catalyst 2950G 10/100 Switch Manuals
Manuals and User Guides for Cisco WS-C2950G-48-EI - Catalyst 2950G 10/100 Switch. We have
3
Cisco WS-C2950G-48-EI - Catalyst 2950G 10/100 Switch manuals available for free PDF download: Configuration Manual, Migration Manual, Product Manual
Cisco WS-C2950G-48-EI - Catalyst 2950G 10/100 Switch Configuration Manual (612 pages)
Catalyst 4500 Series Switches
Brand:
Cisco
| Category:
Switch
| Size: 6.32 MB
Table of Contents
Configuration Guide
1
Table of Contents
3
Related Documentation
25
Obtaining Documentation
27
Ordering Documentation
27
Documentation Feedback
28
Obtaining Technical Assistance
28
Technical Assistance Center
29
Obtaining Additional Publications and Information
30
Catalyst 4000 Series Switches
31
Product Overview
31
Chapter 1 Product Overview
32
Catalyst 2980G Switch
33
Supervisor Engine Software
33
Catalyst 2980G Switch
34
Supervisor Engine Software
34
CHAPTER 2 Using the Command-Line Interface
35
Switch CLI Overview
35
C H a P T E R 2 Using the Command-Line Interface
36
Accessing the Switch CLI
36
Accessing the CLI through the Console Port
36
Accessing the CLI through Telnet
37
Switch CLI Command Modes
37
Accessing Help
38
Command-Line Editing
39
History Substitution
40
Abbreviating a Command
40
Completing a Partial Command
40
Scrolling through Command Output
40
Catalyst 4000 Series Switches
41
Using Command Aliases
41
Specifying Modules, Ports, and Vlans
41
Specifying MAC Addresses
42
Specifying IP Addresses, Host Names, and IP Aliases
42
ROM Monitor CLI
43
Example of a Catalyst 4003 Bootup Display
43
CHAPTER 3 Configuring the Switch IP Address and Default Gateway
45
Understanding How the Switch Management Interfaces Work
45
C H a P T E R 3 Configuring the Switch IP Address and Default Gateway
46
Understanding How Automatic IP Configuration Works
46
Automatic IP Configuration Overview
46
Understanding DHCP
47
Understanding RARP
48
Preparing to Configure the IP Address and Default Gateway
48
Default IP Address and Default Gateway Configuration
49
Setting the In-Band (Sc0) Interface IP Address
49
Setting the Management Ethernet (Me1) Interface IP Address
50
Configuring Default Gateways
50
Configuring the SLIP (Sl0) Interface on the Console Port
52
Using DHCP or RARP to Obtain an IP Address Configuration
53
Renewing and Releasing a DHCP-Assigned IP Address
54
CHAPTER 4 Configuring Ethernet and Fast Ethernet Switching
57
Understanding How Ethernet Works
57
Ethernet Overview
57
C H a P T E R 4 Configuring Ethernet and Fast Ethernet Switching
58
Switching Frames between Segments
58
Building the Address Table
58
Default Ethernet and Fast Ethernet Configurations
58
Configuring Ethernet and Fast Ethernet Ports
59
Setting Ethernet and Fast Ethernet Port Names
59
Setting Ethernet and Fast Ethernet Port Priority Levels
60
Setting Ethernet and Fast Ethernet Port Speeds
60
Setting Ethernet and Fast Ethernet Port Duplex Modes
61
Setting Ethernet and Fast Ethernet Port Debounce Timers
62
Configuring Errdisable State Ethernet and Fast Ethernet Port Timeout Periods
63
Checking Ethernet and Fast Ethernet Port Connectivity
64
Chapter 5 Configuring Gigabit Ethernet Switching
65
Understanding How Gigabit Ethernet Works
65
Understanding How Gigabit Ethernet Flow Control Works
65
Understanding How Port Negotiation Works
67
Understanding How Oversubscribed Gigabit Ethernet Works
67
Default Gigabit Ethernet Configuration
70
Configuring Gigabit Ethernet Ports
71
Assigning Gigabit Ethernet Port Names
71
Configuring Gigabit Ethernet Port Priority Levels
71
Configuring Flow Control on Gigabit Ethernet Ports
72
Enabling Port Negotiation on Gigabit Ethernet Ports
73
Disabling Port Negotiation
73
Configuring Errdisable State Gigabit Ethernet Port Timeout Periods
73
Checking Gigabit Ethernet Port Connectivity
74
CHAPTER 6 Configuring Fast Etherchannel and Gigabit Etherchannel
75
Understanding How Etherchannel Works
75
C H a P T E R 6 Configuring Fast Etherchannel and Gigabit Etherchannel
76
Etherchannel Overview
76
Hardware Support for Etherchannel
76
Understanding Frame Distribution
76
Pagp and LACP
76
Etherchannel Configuration Guidelines and Restrictions
77
Guidelines for Configuring a Port
77
Guidelines for Configuring Vlans and Trunks
78
Etherchannel Interaction with Other Features
78
Understanding the Pagp
79
Pagp Modes
79
Understanding Administrative Groups and Etherchannel Ids
80
Configuring Etherchannel Using Pagp
80
Creating an Etherchannel
81
Defining an Etherchannel Administrative Group
81
Setting the Etherchannel Spanning Tree Port Cost
82
Setting the Etherchannel Spanning Tree Port VLAN Cost
83
Removing an Etherchannel Bundle
83
Displaying Etherchannel Configuration Information
84
Displaying Etherchannel Traffic Statistics
85
Displaying Etherchannel Pagp Statistics
86
Etherchannel Configuration Examples
86
Configuration Example of a Four-Port Fast Etherchannel
86
Configuration Example of Two-Port Gigabit Etherchannel
88
Understanding the LACP
90
LACP Modes
90
LACP Parameters
91
Configuring Etherchannel Using LACP
92
Specifying the Etherchannel Protocol
92
Specifying the System Priority
93
Specifying the Port Priority
93
Specifying an Administrative Key Value
93
Changing the Channel Mode
94
Specifying the Channel Path Cost
95
Specifying the Channel VLAN Cost
95
Clearing LACP Statistics
95
Displaying Etherchannel Traffic Utilization
95
Disabling an Etherchannel
96
Displaying Spanning Tree-Related Information for Etherchannels
96
Chapter 7 Configuring Spanning Tree
98
Understanding How Stps Work
98
Understanding How a Topology Is Created
98
Understanding How a Switch or Port Becomes the Root Switch or Root Port
99
Understanding Bpdus
100
Calculating and Assigning Port Costs
100
Understanding Spanning Tree Port States
101
Blocking State
103
Listening State
103
Learning State
104
Forwarding State
105
Understanding How PVST+ and MISTP Modes Work
107
PVST+ Mode
108
Rapid PVST
108
MISTP Mode
108
MISTP-PVST+ Mode
109
Understanding How Bridge Identifiers Work
109
MAC Address Allocation
109
MAC Address Reduction
109
Understanding How MST Works
110
Rapid Spanning Tree Protocol
112
MST-To-SST Interoperability
113
Common Spanning Tree
114
MST Instances
114
MST Configuration
114
MST Region
115
Message Age and Hop Count
117
MST-To-PVST+ Interoperability
117
Understanding How BPDU Skewing Works
118
Using PVST
118
Default PVST+ Configuration
119
Setting the PVST+ Bridge ID Priority
119
Configuring the PVST+ Port Cost
121
Configuring PVST+ Port Priority
121
Configuring the PVST+ Default Port Cost Mode
122
Configuring the PVST+ Port VLAN Cost
122
Configuring the PVST+ Port VLAN Priority
123
Disabling the PVST+ Mode on a VLAN
124
Using Rapid PVST
124
Using MISTP-PVST+ or MISTP
126
Default MISTP Mode Configuration
126
Setting the MISTP-PVST+ Mode or MISTP Mode
127
Configuring the MISTP Bridge ID Priority
128
Enabling an MISTP Instance
132
Mapping Vlans to an MISTP Instance
132
Disabling MISTP-PVST+ or MISTP
135
Configuring a Root Switch
135
Configuring a Primary Root Switch
135
Configuring a Secondary Root Switch
136
Configuring a Root Switch to Improve Convergence
137
Using Root Guard-Preventing Switches from Becoming Root
139
Displaying Spanning Tree BPDU Statistics
139
Configuring Spanning Tree Timers
140
Configuring the Hello Time
140
Configuring the Forward Delay Time
141
Configuring the Maximum Aging Time
141
Configuring MST
142
Enabling MST
142
Mapping and Unmapping Vlans to an MST Instance
150
Configuring Spanning Tree BPDU Skewing
153
CHAPTER 8 Configuring Spanning Tree Portfast, BPDU Guard, BPDU Filter, Uplinkfast, Backbonefast, and
157
Understanding How Portfast Works
157
Understanding How Portfast BPDU Guard Works
158
Understanding How Portfast BPDU Filtering Works
158
Understanding How Uplinkfast Works
159
Understanding How Backbonefast Works
160
Understanding How Loop Guard Works
162
Configuring Portfast
164
Enabling Portfast on an Access Port
164
Enabling Portfast on a Trunk Port
165
Disabling Portfast
166
Resetting Portfast
167
Configuring Portfast BPDU Guard
167
Enabling Portfast BPDU Guard
167
Disabling Portfast BPDU Guard
168
Configuring Portfast BPDU Filtering
169
Enabling Portfast BPDU Filtering
169
Disabling Portfast BPDU Filtering
170
Configuring Uplinkfast
171
Enabling Uplinkfast
171
Disabling Uplinkfast
172
Configuring Backbonefast
173
Enabling Backbonefast
173
Displaying Backbonefast Statistics
173
Disabling Backbonefast
174
Configuring Loop Guard
174
Enabling Loop Guard
174
Disabling Loop Guard
175
Configuring VTP
177
Understanding How VTP Version 1 and Version 2 Work
177
Chapter 9 Configuring VTP
178
Understanding the VTP Domain
178
Understanding VTP Modes
178
Understanding VTP Advertisements
179
Understanding VTP Version 2
179
Understanding VTP Pruning
180
Default VTP Version 1 and Version 2 Configuration
181
VTP Version 1 and Version 2 Configuration Guidelines
182
Configuring VTP Version 1 and Version 2
183
Configuring a VTP Server
183
Configuring a VTP Client
183
Configuring VTP (VTP Transparent Mode)
184
Disabling VTP Using the off Mode
185
Enabling VTP Version 2
185
Disabling VTP Version 2
186
Enabling VTP Pruning
187
Disabling VTP Pruning
188
Displaying VTP Statistics
188
Understanding How VTP Version 3 Works
189
VTP Version 3 Authentication
189
VTP Version 3 Per-Port Configuration
190
VTP Version 3 Domains, Modes, and Partitions
190
VTP Version 3 Modes
194
VTP Version 3 Databases
195
Default VTP Version 3 Configuration
198
Configuring VTP Version 3
198
Changing VTP Version 3 Modes
199
Configuring VTP Version 3 Passwords
203
Configuring a VTP Version 3 Takeover
204
Disabling VTP Version 3 on a Per-Port Basis
205
VTP Version 3 Show Commands
205
Understanding How Vlans Work
207
Chapter 10 Configuring VLAN
208
VLAN Ranges
209
Configurable VLAN Parameters
210
VLAN Default Configuration
210
VLAN Configuration Guidelines
211
Configuring Vlans on the Switch
212
Creating or Modifying an Ethernet VLAN
212
Creating or Modifying a Normal-Range Ethernet VLAN
213
Creating or Modifying an Extended-Range VLAN
215
Assigning Switch Ports to a VLAN
216
Mapping 802.1Q Vlans to ISL Vlans
217
Clearing 802.1Q-To-ISL VLAN Mappings
218
Deleting a VLAN
218
Configuring Auxiliary Vlans
219
Understanding Auxiliary Vlans
219
Configuring Private Vlans
222
Private VLAN Configuration Guidelines
223
Creating a Private VLAN
225
Viewing the Port Capability of a Private VLAN Port
228
Deleting a Private VLAN
228
Deleting an Isolated or Community VLAN
229
Deleting a Private VLAN Mapping
229
Chapter 11 Configuring VLAN Trunks on Fast Ethernet and Gigabit Ethernet Ports
231
Understanding How VLAN Trunks Work
231
Trunking Overview
231
Trunking Modes and Encapsulation Types
232
Trunking Support
233
802.1Q Trunk Restrictions
234
Default Trunk Configuration
235
Configuring a Trunk Link
235
Configuring an 802.1Q Trunk
235
Defining the Allowed Vlans on a Trunk
236
Disabling a Trunk Port
237
Disabling VLAN 1 on a Trunk Link
238
Example VLAN Trunk Configurations
239
802.1Q Trunk over a Gigabit Etherchannel Link Example
239
Load-Sharing VLAN Traffic over Parallel Trunks Example
243
802.1Q Nonegotiate Trunk Configuration Example
249
Chapter 12 Configuring Dynamic VLAN Membership with VMPS
253
Understanding How VMPS Works
253
VMPS and Dynamic Port Hardware and Software Requirements
254
Default VMPS and Dynamic Port Configuration
255
Configuration Guidelines for Dynamic Ports and VMPS
255
Configuring VMPS
256
Creating the VMPS Database
256
Catalyst 2948G Switch
257
Configuring the VMPS Server
259
Configuring VMPS Clients
260
Monitoring VMPS
261
Maintaining VMPS
261
Configuring Static Ports
262
Troubleshooting VMPS and Dynamic Port VLAN Membership
263
Troubleshooting VMPS
263
Troubleshooting Dynamic Ports
263
VMPS Example
264
Dynamic Port VLAN Membership with Auxiliary Vlans
266
Configuration Guidelines
267
Configuring Dynamic Port VLAN Membership with Auxiliary Vlans
267
Chapter 13 Configuring GVRP
269
Understanding How GVRP Works
269
GVRP Hardware and Software Requirements
269
Default GVRP Configuration
270
GVRP Configuration Guidelines
270
Configuring GVRP on the Switch
270
Enabling GVRP Globally
270
Enabling GVRP on Individual 802.1Q Trunk Ports
271
Enabling GVRP Dynamic VLAN Creation
272
Configuring GVRP Registration
272
Sending GVRP VLAN Declarations from Blocking Ports
274
Setting the GARP Timers
274
Displaying GVRP Statistics
275
Clearing GVRP Statistics
276
Disabling GVRP on Individual 802.1Q Trunk Ports
276
Disabling GVRP Globally
276
Configuring Qos
277
Understanding How Qos Works
277
Qos Overview
277
Chapter 14 Configuring Qo
278
Understanding Qos Terminology
278
Understanding Classification and Marking at the Ingress Port
279
Understanding Scheduling
279
Software Requirements
280
Qos Default Configuration
280
Configuring Qos on the Switch
280
Enabling Qos Globally
281
Configuring the Default Cos Value for the Switch
281
Reverting to the Default Switch Cos Value
281
Mapping Cos Values to Transmit Queues and Drop Thresholds
282
Reverting to the Default Cos-To-Transmit Queue and Drop Threshold Mapping
282
Displaying Qos Information
283
Reverting to Qos Defaults
283
Disabling Qos
283
Chapter 15 Configuring Multicast Services
285
Understanding How Multicasting Works
285
Understanding Multicasting and Multicast Services Operation
285
Joining a Multicast Group
286
Leaving a Multicast Group
286
Understanding GMRP Operation
287
Configuring CGMP
288
CGMP Hardware and Software Requirements
288
Default CGMP Configuration
288
Enabling CGMP
288
Enabling CGMP Leave Processing
289
Enabling CGMP Fast-Leave Processing
289
Displaying Multicast Router Information
290
Displaying Multicast Group Information
290
Displaying CGMP Statistics
291
Disabling CGMP Leave Processing
292
Disabling CGMP Fast-Leave Processing
292
Disabling CGMP
292
Configuring GMRP
293
GMRP Software Requirements
293
Default GMRP Configuration
293
Enabling GMRP Globally
293
Enabling GMRP on Individual Switch Ports
294
Disabling GMRP on Individual Switch Ports
294
Enabling GMRP Forward-All Option
295
Disabling GMRP Forward-All Option
295
Configuring GMRP Registration
296
Setting the GARP Timers
297
Displaying GMRP Statistics
298
Clearing GMRP Statistics
299
Disabling GMRP
299
Configuring Multicast Router Ports and Group Entries
299
Specifying Multicast Router Ports
300
Configuring Multicast Groups
300
Disabling Multicast Router Ports
301
Disabling Multicast Group Entries
301
Filtering IGMP Traffic
301
Using IGMP Traffic Filtering
302
IGMP Software Requirements
302
Default IGMP Filter Configuration
302
IGMP Multicast Filter Activation
303
Configuring Port IP Multicast Filtering
304
Chapter 16 Configuring Port Security
309
Understanding How Port Security Works
309
Allowing Traffic Based on the Host MAC Address
309
Restricting Traffic Based on the Host MAC Address
310
Blocking Unicast Flood Packets on Secure Ports
311
Port Security Configuration Guidelines
311
Configuring Port Security on the Switch
311
Enabling Port Security
311
Setting the Maximum Number of Secure MAC Addresses
312
Setting the Port Security Age Time
313
Clearing MAC Addresses
313
Configuring Unicast Flood Blocking on Secure Ports
314
Enabling MAC Address Notification
315
Setting the Security Violation Action
316
Setting the Shutdown Time
317
Disabling Port Security
317
Restricting Traffic for a Host MAC Address
318
Monitoring Port Security
318
Chapter 17 Configuring Unicast Flood Blocking
321
Understanding How Unicast Flood Blocking Works
321
Configuration Guidelines for Unicast Flood Blocking
322
Configuring Unicast Flood Blocking on the Switch
322
Enabling Unicast Flood Blocking
322
Disabling Unicast Flood Blocking
323
Displaying Unicast Flood Blocking
323
Chapter 18 Configuring the IP Permit List
325
Understanding How the IP Permit List Works
325
IP Permit List Default Configuration
326
Configuring the IP Permit List on the Switch
326
Adding IP Addresses to the IP Permit List
326
Enabling the IP Permit List
327
Disabling the IP Permit List
328
Clearing an IP Permit List Entry
328
Chapter 19 Configuring Protocol Filtering
331
Understanding How Protocol Filtering Works
331
Default Protocol Filtering Configuration
332
Configuring Protocol Filtering on the Switch
332
Configuring Protocol Filtering
332
Disabling Protocol Filtering
333
Chapter 20 Checking Status and Connectivity
335
Checking Module Status
335
Checking Port Status
336
Displaying the Port MAC Address
338
Displaying Port Capabilities
339
Using Telnet
340
Changing the Login Timer
340
Using Secure Shell Encryption for Telnet Sessions
341
Monitoring User Sessions
342
Using Ping
343
Understanding How Ping Works
343
Executing Ping
344
Using Layer 2 Traceroute
345
Layer 2 Traceroute Usage Guidelines
345
Identifying a Layer 2 Path
345
Using IP Traceroute
346
Understanding How IP Traceroute Works
346
Executing IP Traceroute
346
Chapter 21 Configuring CDP
349
Understanding How CDP Works
349
Default CDP Configuration
350
Configuring CDP on the Switch
350
Setting the CDP Global Enable State
350
Setting the CDP Enable State on a Port
350
Setting the CDP Message Interval
352
Setting the CDP Holdtime
352
Displaying CDP Neighbor Information
353
Chapter 22 Using Switch Topn Reports
355
Understanding How Switch Topn Reports Works
355
Running Switch Topn Reports with the Background Option
356
Running Switch Topn Reports Without the Background Option
356
Understanding How Switch Topn Reports Works
356
Running and Viewing Switch Topn Reports
357
Running and Viewing Switch Topn Reports
358
Chapter 23 Configuring UDLD
361
Understanding How UDLD Works
361
UDLD Software and Hardware Requirements
362
Default UDLD Configuration
362
Configuring UDLD on the Switch
363
Enabling UDLD Globally
363
Enabling UDLD on Individual Ports
364
Disabling UDLD on Individual Ports
364
Disabling UDLD Globally
364
Specifying the UDLD Message Interval
365
Enabling UDLD Aggressive Mode
365
Displaying the UDLD Configuration
366
Chapter 24 Configuring SNMP
369
SNMP Terminology
369
SNMP Terminology
370
Understanding How SNMP Works
371
Security Models and Levels
372
SNMP Ifindex Persistence Feature
372
Understanding How SNMP Works
372
Understanding How Snmpv1 and Snmpv2C Work
373
Snmpv1 and Snmpv2C Default Configuration
374
Configuring Snmpv1 and Snmpv2C from an NMS
374
Configuring Snmpv1 and Snmpv2C from the CLI
374
Snmpv1 and Snmpv2C Enhancements in Software Release 7.5(1)
376
Understanding Snmpv3
379
Benefits of Snmpv3
379
SNMP Entity
379
Configuring Snmpv3 from an NMS
382
Configuring Snmpv3 from the CLI
382
Using Ciscoworks2000
385
Chapter 25 Configuring RMON
387
Understanding How RMON Works
387
Enabling RMON
388
Viewing RMON Data
388
Supported RMON and RMON2 MIB Objects
388
Chapter 26 Configuring SPAN and RSPAN
391
Understanding How SPAN and RSPAN Work
391
SPAN Session
391
Destination Port
392
Source Port
392
Reflector Port
393
Ingress SPAN
393
Egress SPAN
393
Vspan
393
Configuring SPAN
394
Understanding How SPAN Works
394
SPAN Configuration Guidelines
395
Configuring SPAN
396
SPAN and RSPAN Session Limits
394
SPAN Traffic
394
Trunk VLAN Filtering
394
Configuring RSPAN
398
RSPAN Software and Hardware Requirements
398
Understanding How RSPAN Works
398
RSPAN Configuration Guidelines
399
Configuring RSPAN
400
RSPAN Configuration Examples
403
Chapter 27 Administering the Switch
409
Setting the System Name and System Prompt
409
Configuring the System Name and Prompt
410
Setting the System Contact and Location
411
Setting the System Clock
412
Creating a Login Banner
412
Configuring a Login Banner
412
Clearing the Login Banner
413
Enabling or Disabling the "Cisco Systems Console" Telnet Login Banner
413
Defining and Using Command Aliases
414
Defining and Using IP Aliases
415
Configuring Permanent and Static ARP Entries
416
Configuring Static Routes
417
Scheduling a System Reset
418
Scheduling a Reset at a Specific Time
418
Scheduling a Reset Within a Specified Amount of Time
419
Generating System Status Reports for Tech Support
420
Chapter 28 Power Management
421
Understanding How Power Management Works on the Catalyst 4500 Series Switches
421
Power Management Overview
422
Understanding Power Management Modes
422
Available Power for Power Supplies
424
Power Management Limitations
424
1400 W DC Power Supply Guidelines and Restrictions
425
Understanding How Power Management Works on the Catalyst 4006 Switch
426
Understanding Power Redundancy
426
1+1 Redundancy Mode Guidelines and Restrictions
427
1+1 Redundancy Mode Limitations
427
Power Consumption for Modules
429
Migrating a Supervisor Engine II from a Catalyst 4006 Switch to a Catalyst 4500 Series Switch
430
Understanding How Inline Power Works
431
Inline Power Management Modes
432
Power Requirements
432
Phone Detection Summary
434
Configuring Power Management
434
Setting Redundant Mode for the Catalyst 4500 Series Switches
434
Setting Combined Mode on the Catalyst 4500 Series Switches
435
Setting the DC Power Input
436
Setting the Power Budget for the Catalyst 4006 Switch
436
Displaying System Information
437
Configuring Inline Power
438
Migrating a Supervisor Engine II from a Catalyst 4006 Switch to a Catalyst 4500 Series Switch
438
Setting the Power Mode of a Port or Group of Ports
438
Setting the Default Power Allocation for a Port
439
Displaying the Power Status for Modules and Individual Ports
439
Chapter 29 Configuring Voip
441
Hardware and Software Requirements
441
Overview of IP Phones
442
Configuring Voip on a Switch
443
Configuring Voip on a Switch
444
Chapter 30 Configuring Switch Access Using AAA
445
Understanding How Authentication Works
445
Understanding How Login Authentication Works
446
Understanding How Local Authentication Works
446
Understanding How Local User Authentication Works
447
Understanding How TACACS+ Authentication Works
447
Understanding How RADIUS Authentication Works
448
Understanding How Kerberos Authentication Works
449
Configuring Authentication
452
Authentication Default Configuration
452
Authentication Configuration Guidelines
453
Configuring Login Authentication
453
Configuring Local Authentication
456
Recovering a Lost Password
458
Configuring Local User Authentication
459
Configuring TACACS+ Authentication
461
Configuring RADIUS Authentication
467
Configuring Kerberos Authentication
475
Authentication Example
484
Understanding How Authorization Works
485
Authorization Events
485
TACACS+ Primary and Fallback Options
485
TACACS+ Command Authorization
486
RADIUS Authorization
486
Configuring Authorization
487
Authorization Default Configuration
487
TACACS+ Authorization Configuration Guidelines
487
Configuring TACACS+ Authorization
487
Authorization Example
490
Understanding How Accounting Works
491
Accounting Overview
492
Accounting Events
492
Specifying When to Create Accounting Records
492
Specifying RADIUS Servers
493
Updating the Server
494
Suppressing Accounting
494
Configuring Accounting
494
Accounting Default Configuration
494
Accounting Configuration Guidelines
494
Configuring Accounting
495
Accounting Example
497
Chapter 31 Configuring 802.1X Authentication
499
Understanding How 802.1X Authentication Works
499
Device Roles
500
Authentication Initiation and Message Exchange
501
Ports in Authorized and Unauthorized States
502
Authentication Server
503
802.1X Parameters Configurable on the Switch
504
802.1X VLAN Assignment Using a RADIUS Server
504
Authentication Default Configuration
505
Authentication Configuration Guidelines
506
Configuring 802.1X Authentication on the Switch
506
Enabling 802.1X Globally
506
Disabling 802.1X Globally
506
Enabling and Initializing 802.1X Authentication for Individual Ports
507
Setting and Enabling Automatic Reauthentication of the Host
508
Manually Reauthenticating the Host
508
Enabling Multiple Hosts
509
Disabling Multiple Hosts
509
Setting the Quiet Period
509
Setting the Authenticator-To-Host Retransmission Time for EAP-Request/Identity Frames
510
Setting the Supplicant-To-Host Retransmission Time for EAP-Request Frames
510
Layer Packets
511
Setting the Back-End Authenticator-To-Host Frame-Retransmission Number
511
Setting the Shutdown Timeout Period
511
Setting the Back-End Authenticator-To-Host Frame-Retransmission Number
512
Resetting the 802.1X Configuration Parameters to the Default Values
513
Setting the Trace Severity
513
Using the Show Commands
514
Chapter 32 Modifying the Switch Boot Configuration
517
Understanding How the Switch Boot Configuration Works
517
Understanding the Boot Process
517
Understanding the ROM Monitor
518
Understanding the Configuration Register
518
Understanding the BOOT Environment Variable
519
Understanding the CONFIG_FILE Environment Variable
519
Default Switch Boot Configuration
520
Setting the Configuration Register
520
Setting the Boot Field in the Configuration Register
520
Setting CONFIG_FILE Recurrence
521
Setting the Switch to Ignore the NVRAM Configuration
522
Setting the BOOT Environment Variable
522
Clearing the BOOT Environment Variable Settings
523
Setting and Clearing the CONFIG_FILE Environment Variable
523
Setting the CONFIG_FILE Environment Variable
523
Clearing CONFIG_FILE Environment Variable Entries
524
Displaying the Switch Boot Configuration
524
Chapter 33 Working with System Software Images
525
Software Image Naming Conventions
525
Downloading System Software Images to the Switch Using TFTP
525
Understanding How TFTP Software Image Downloads Work
526
Preparing to Download an Image Using TFTP
526
Downloading Supervisor Engine Images Using TFTP
526
Sample TFTP Download Procedures
527
Uploading System Software Images to a TFTP Server
528
Preparing to Upload an Image to a TFTP Server
529
Uploading Software Images to a TFTP Server
529
Downloading System Software Images to the Switch Using Rcp
529
Understanding How Rcp Software Image Downloads Work
530
Preparing to Download an Image Using Rcp
530
Downloading Supervisor Engine Images Using Rcp
530
Sample Rcp Download Procedures
531
Uploading System Software Images to an Rcp Server
532
Preparing to Upload an Image to an Rcp Server
533
Uploading Software Images to an Rcp Server
533
Upgrading the ROM Monitor
533
Chapter 34 Working with the Flash File System
539
Working with the Flash File System on the Switch
539
Setting the Default Flash Device
539
Setting the Text File Configuration Mode
540
Listing the Files on a Flash Device
540
Displaying the Contents of a File on a Flash Device
541
Copying Files
542
Deleting Files
543
Restoring Deleted Files
544
Verifying a File Checksum
545
Chapter 35 Working with Configuration Files
547
Creating and Using Configuration Files Guidelines
547
Creating a Configuration File
548
Configuring the Switch Using a File in Flash Memory
548
Copying Configuration Files Using TFTP
549
Downloading Configuration Files from a TFTP Server
549
Uploading Configuration Files to a TFTP Server
550
Copying Configuration Files Using Rcp
551
Downloading Configuration Files from an Rcp Server
552
Uploading Configuration Files to an Rcp Server
553
Clearing the Configuration
554
Chapter 36 Configuring Switch Acceleration
555
Understanding How Switch Acceleration Works
555
Configuring Switch Acceleration on the Switch
556
Enabling Switch Acceleration
557
Displaying Switch Acceleration Information
557
Backplane Channel Module
557
Chapter 37 Configuring System Message Logging
559
Understanding How System Message Logging Works
559
System Log Message Format
561
Default System Message Logging Configuration
562
System Log Message Format
562
Configuring System Message Logging on the Switch
563
Configuring Session Logging Settings
563
Configuring the System Message Logging Levels
564
Enabling and Disabling the Logging Time Stamp
564
Setting the Logging Buffer Size
565
Limiting the Number of Syslog Messages
565
Configuring the Syslog Daemon on a UNIX Syslog Server
565
Configuring Syslog Servers
566
Displaying the Logging Configuration
567
Displaying System Messages
568
Chapter 38 Configuring DNS
571
Understanding How DNS Works
571
Default DNS Configuration
571
Configuring DNS on the Switch
572
Setting up and Enabling DNS
572
Clearing a DNS Server
573
Clearing the DNS Domain Name
573
Disabling DNS
573
Chapter 39 Configuring NTP
575
Understanding How NTP Works
575
Default NTP Configuration
576
Configuring NTP on the Switch
576
Enabling NTP in Broadcast-Client Mode
576
Configuring NTP in Client Mode
577
Configuring Authentication in Client Mode
578
Setting the Time Zone
579
Enabling the Daylight Saving Time Adjustment
579
Disabling the Daylight Saving Time Adjustment
581
Clearing the Time Zone
581
Clearing NTP Servers
581
Disabling NTP
582
Appendix
583
A Acronyms
583
Appendix A Acronym
585
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide — Release
585
I N D E X
593
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