Cisco 2950 - Catalyst Switch Installation manual

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Catalyst 2950 and Catalyst 2955 Switch
Command Reference
Cisco IOS Release 12.1(22)EA7
March 2006
Text Part Number: OL-10102-01

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Catalyst 2950 and Catalyst 2955 Switch Command Reference
Copyright © 2006 Cisco Systems, Inc. All rights reserved

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CONTENTS
Preface xv
Audience xv
Purpose xv
Conventions xv
Related Publications xvi
Obtaining Documentation xvii
Cisco.com xvii
Product Documentation DVD xvii
Ordering Documentation xviii
Documentation Feedback xviii
Cisco Product Security Overview xviii
Reporting Security Problems in Cisco Products xix
Obtaining Technical Assistance xix
Cisco Technical Support & Documentation Website xx
Submitting a Service Request xx
Definitions of Service Request Severity xx
Obtaining Additional Publications and Information xxi
CHAPTER 1Using the Command-Line Interface 1-1
Type of Memory 1-1
Platforms 1-1
CLI Command Modes 1-2
User EXEC Mode 1-3
Privileged EXEC Mode 1-3
Global Configuration Mode 1-4
Interface Configuration Mode 1-4
config-vlan Mode 1-4
VLAN Configuration Mode 1-5
Line Configuration Mode 1-5
Command Summary 1-6
CHAPTER 2Catalyst 2950 and 2955 Cisco IOS Commands 2-1
aaa accounting dot1x 2-1

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aaa authentication dot1x 2-3
access-list (IP extended) 2-5
access-list (IP standard) 2-8
archive download-sw 2-10
archive tar 2-12
archive upload-sw 2-15
auto qos voip 2-17
boot boothlpr 2-21
boot buffersize 2-22
boot config-file 2-23
boot enable-break 2-24
boot helper 2-25
boot helper-config-file 2-26
boot manual 2-27
boot private-config-file 2-28
boot system 2-29
channel-group 2-30
channel-protocol 2-33
class 2-35
class-map 2-37
clear controllers ethernet-controller 2-39
clear controllers lre 2-41
clear controllers lre link monitor 2-42
clear controllers lre log 2-43
clear interface 2-44
clear lacp 2-45
clear lre rate selection 2-46
clear mac address-table 2-47
clear pagp 2-49
clear port-security 2-50
clear spanning-tree counters 2-53
clear spanning-tree detected-protocols 2-54
clear vmps statistics 2-55
clear vtp counters 2-56
cluster commander-address 2-57

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cluster discovery hop-count 2-59
cluster enable 2-60
cluster holdtime 2-61
cluster management-vlan 2-62
cluster member 2-63
cluster run 2-65
cluster standby-group 2-66
cluster timer 2-68
controller longreachethernet 2-69
cpe duplex 2-70
cpe protected 2-72
cpe shutdown 2-73
cpe speed 2-75
cpe toggle 2-77
cpe type 2-79
define interface-range 2-80
delete 2-82
deny (access-list configuration) 2-83
deny (MAC access-list configuration) 2-86
dot1x 2-88
dot1x auth-fail max-attempts 2-90
dot1x auth-fail vlan 2-91
dot1x control-direction 2-93
dot1x default 2-95
dot1x guest-vlan 2-96
dot1x host-mode 2-98
dot1x initialize 2-99
dot1x max-req 2-100
dot1x multiple-hosts 2-101
dot1x port-control 2-102
dot1x re-authenticate 2-104
dot1x re-authentication 2-105
dot1x reauthentication 2-106
dot1x timeout 2-107
duplex 2-109

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errdisable detect cause 2-111
errdisable recovery 2-113
flowcontrol 2-115
hw-module slot 2-119
interface 2-122
interface port-channel 2-124
interface range 2-125
interleave 2-127
ip access-group 2-129
ip access-list 2-131
ip address 2-133
ip dhcp snooping 2-134
ip dhcp snooping information option 2-135
ip dhcp snooping information option allow-untrusted 2-137
ip dhcp snooping limit rate 2-139
ip dhcp snooping trust 2-140
ip dhcp snooping vlan 2-141
ip igmp filter 2-142
ip igmp max-groups 2-143
ip igmp profile 2-145
ip igmp snooping 2-147
ip igmp snooping mrouter learn pim v2 2-148
ip igmp snooping report-suppression 2-150
ip igmp snooping source-only-learning 2-152
ip igmp snooping vlan 2-154
ip igmp snooping vlan immediate-leave 2-155
ip igmp snooping vlan last-member-query interval 2-156
ip igmp snooping vlan mrouter 2-157
ip igmp snooping vlan static 2-159
ip ssh 2-161
lacp port-priority 2-163
lacp system-priority 2-165
link monitor 2-167
link monitor logging 2-168
link monitor threshold rserr 2-169

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link monitor threshold snr 2-171
local duplex 2-172
local speed 2-173
logging lre 2-174
lre profile 2-175
lre rate selection sequence 2-177
lre sequence 2-179
lre syslog 2-181
lre upbo 2-182
lre upgrade default family 2-184
mac access-group 2-186
mac access-list extended 2-188
mac address-table aging-time 2-190
mac address-table notification 2-192
mac address-table static 2-194
mac address-table static drop 2-196
macro apply 2-198
macro description 2-201
macro global 2-202
macro global description 2-204
macro name 2-205
margin 2-207
match 2-209
media-type 2-211
mls qos cos 2-213
mls qos map 2-215
mls qos trust 2-218
monitor session 2-221
mvr 2-224
mvr immediate 2-227
mvr type 2-228
mvr vlan group 2-230
pagp learn-method 2-232
pagp port-priority 2-234
permit (access-list configuration) 2-235

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permit (MAC access-list configuration) 2-238
persistence 2-240
police 2-241
policy-map 2-243
port-channel load-balance 2-246
profile (interface configuration) 2-248
profile (sequence configuration) 2-250
rate selection 2-252
rate selection profile lock 2-253
rate selection sequence 2-255
rcommand 2-257
remote-span 2-259
rmon collection stats 2-261
service password-recovery 2-263
service-policy 2-265
set 2-266
setup express 2-268
show access-lists 2-270
show auto qos 2-272
show boot 2-275
show class-map 2-277
show cluster 2-279
show cluster candidates 2-282
show cluster members 2-284
show controllers ethernet-controller 2-287
show controllers lre cpe 2-296
show controllers lre actual 2-299
show controllers lre admin 2-302
show controllers lre link monitor 2-304
show controllers lre log 2-307
show controllers lre profile 2-309
show controllers lre sequence 2-312
show controllers lre status 2-314
show controllers lre version 2-319
show controllers utilization 2-320

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show dot1x 2-322
show env 2-326
show errdisable recovery 2-327
show etherchannel 2-329
show file 2-332
show flowcontrol 2-335
show interfaces 2-337
show interfaces counters 2-346
show inventory 2-349
show ip access-lists 2-350
show ip dhcp snooping 2-352
show ip dhcp snooping binding 2-353
show ip igmp profile 2-355
show ip igmp snooping 2-356
show ip igmp snooping querier detail 2-359
show lacp 2-361
show lre upgrade 2-363
show mac access-group 2-367
show mac address-table 2-370
show mac address-table multicast 2-373
show mac address-table notification 2-375
show mls masks 2-376
show mls qos interface 2-378
show mls qos maps 2-380
show monitor 2-382
show mvr 2-384
show mvr interface 2-385
show mvr members 2-387
show pagp 2-389
show parser macro 2-391
show policy-map 2-394
show port-security 2-396
show rps 2-398
show running-config vlan 2-400
show setup express 2-402
show spanning-tree 2-403

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show storm-control 2-408
show system mtu 2-411
show udld 2-412
show version 2-415
show vlan 2-417
show vmps 2-420
show vtp 2-423
show wrr-queue bandwidth 2-428
show wrr-queue cos-map 2-429
shutdown 2-430
shutdown vlan 2-431
snmp-server enable traps 2-432
snmp-server host 2-436
snmp trap mac-notification 2-440
spanning-tree backbonefast 2-441
spanning-tree bpdufilter 2-442
spanning-tree bpduguard 2-444
spanning-tree cost 2-446
spanning-tree etherchannel guard misconfig 2-448
spanning-tree extend system-id 2-450
spanning-tree guard 2-452
spanning-tree link-type 2-454
spanning-tree loopguard default 2-455
spanning-tree mode 2-457
spanning-tree mst configuration 2-459
spanning-tree mst cost 2-461
spanning-tree mst forward-time 2-463
spanning-tree mst hello-time 2-464
spanning-tree mst max-age 2-465
spanning-tree mst max-hops 2-467
spanning-tree mst port-priority 2-468
spanning-tree mst priority 2-470
spanning-tree mst root 2-471
spanning-tree port-priority 2-473
spanning-tree portfast (global configuration) 2-475

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spanning-tree portfast (interface configuration) 2-477
spanning-tree stack-port 2-479
spanning-tree uplinkfast 2-481
spanning-tree vlan 2-483
speed 2-486
storm-control 2-489
switchport access 2-492
switchport block 2-494
switchport host 2-496
switchport mode 2-498
switchport nonegotiate 2-500
switchport port-security 2-502
switchport port-security aging 2-506
switchport priority extend 2-508
switchport protected 2-510
switchport trunk 2-511
switchport voice vlan 2-514
system mtu 2-516
traceroute mac 2-519
traceroute mac ip 2-522
udld 2-524
udld port 2-526
udld reset 2-528
upgrade binary 2-529
upgrade preserve 2-530
vlan (global configuration) 2-531
vlan (VLAN configuration) 2-537
vlan database 2-543
vmps reconfirm (global configuration) 2-546
vmps reconfirm (privileged EXEC) 2-547
vmps retry 2-548
vmps server 2-549
vtp (global configuration) 2-551
vtp (privileged EXEC) 2-555
vtp (VLAN configuration) 2-557

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wrr-queue bandwidth 2-561
wrr-queue cos-map 2-563
APPENDIX ACatalyst 2955 Alarm Commands A-1
alarm facility fcs-hysteresis A-2
alarm facility power-supply A-3
alarm facility temperature A-4
alarm profile (global configuration) A-6
alarm profile (interface configuration) A-8
fcs-threshold A-9
power-supply dual A-10
show alarm description port A-11
show alarm profile A-12
show alarm settings A-14
show env A-16
show facility-alarm relay A-18
show facility-alarm status A-19
show fcs-threshold A-20
test relay A-21
APPENDIX BCatalyst 2950 and 2955 Switch
Boot Loader Commands B-1
boot B-2
cat B-4
copy B-5
delete B-6
dir B-7
flash_init B-9
format B-10
fsck B-11
help B-12
load_helper B-13
memory B-14
mkdir B-16
more B-17
rename B-18

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reset B-19
rmdir B-20
set B-21
type B-24
unset B-25
version B-27
APPENDIX CCatalyst 2950 and 2955 Switch Debug Commands C-1
debug auto qos C-2
debug dot1x C-4
debug etherchannel C-5
debug lre C-6
debug pagp C-7
debug pm C-8
debug spanning-tree C-10
debug spanning-tree backbonefast C-12
debug spanning-tree bpdu C-13
debug spanning-tree bpdu-opt C-14
debug spanning-tree mstp C-15
debug spanning-tree switch C-17
debug spanning-tree uplinkfast C-19
debug switch dhcp C-20
debug sw-vlan C-21
debug sw-vlan ifs C-23
debug sw-vlan notification C-24
debug sw-vlan vtp C-26
debug udld C-28
I NDEX

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Preface
Audience
This guide is for the networking professional using the Cisco IOS command-line interface (CLI) to
manage the Catalyst 2950 and 2955 switches, hereafter referred to as the switches. Before using this
guide, you should have experience working with the Cisco IOS and be familiar with the concepts and
terminology of Ethernet and local area networking.
Purpose
The Catalyst 2950 switch is supported by either the standard software image (SI) or the enhanced
software image (EI). The Catalyst 2955 and the Catalyst 2950 Long-Reach Ethernet (LRE) switches are
supported only by the EI. The EI provides a richer set of features, including access control lists (ACLs),
enhanced quality of service (QoS) features, extended-range VLANs, the IEEE 802.1s Multiple STP,
Remote Switched Port Analyzer (RSPAN), and unicast MAC address filtering.
This guide provides the information you need about the commands that have been created or changed
for use with the Catalyst 2950 family of switches. For information about the standard Cisco IOS Release
12.1 commands, see the Cisco IOS documentation set available from the Cisco.com home page by
selecting Service and Support > Technical Documents. On the Cisco Product Documentation home
page, select Release 12.1 from the Cisco IOS Software drop-down list.
This guide does not provide procedures for configuring your switch. For detailed configuration
procedures, see the software configuration guide for this release.
This guide does not describe system messages you might encounter. For more information, see the
system message guide for this release.
For documentation updates, see the release notes for this release.
Conventions
This guide uses these conventions to convey instructions and information:
Command descriptions use these conventions:
•Commands and keywords are in boldface text.
•Arguments for which you supply values are in italic.
•Square brackets ([ ]) mean optional elements.

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Preface
Related Publications
•Braces ({ }) group required choices, and vertical bars ( | ) separate the alternative elements.
•Braces and vertical bars within square brackets ([{ | }]) mean a required choice within an optional
element.
Interactive examples use these conventions:
•Terminal sessions and system displays are in screen font.
•Information you enter is in boldface screen font.
•Nonprinting characters, such as passwords or tabs, are in angle brackets (< >).
Notes, cautions, and tips use these conventions and symbols:
Note Means reader take note. Notes contain helpful suggestions or references to materials not contained in
this manual.
Caution Means reader be careful. In this situation, you might do something that could result in equipment
damage or loss of data.
Related Publications
These documents provide complete information about the switch and are available from this URL:
http://www.cisco.com/en/US/products/ps6738/tsd_products_support_series_home.html
http://www.cisco.com/en/US/products/hw/switches/ps628/tsd_products_support_series_home.html
You can order printed copies of documents with a DOC-xxxxxx= number from the Cisco.com sites and
from the telephone numbers listed in the “Obtaining Documentation” section on page xvii.
•Release Notes for the Catalyst 2955, Catalyst 2950, and Catalyst 2940 Switches (not orderable but
available on Cisco.com)
•Catalyst 2955, 2950 and 2940 Switch System Message Guide (not orderable but available on
Cisco.com)
Note Switch requirements and procedures for initial configurations and software upgrades tend to
change and therefore appear only in the release notes. Before installing, configuring, or
upgrading the switch, see the release notes on Cisco.com for the latest information.
For information about the switch, see these documents:
•Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide (not orderable but available
on Cisco.com)
•Catalyst 2950 and Catalyst 2955 Switch Command Reference (not orderable but available on
Cisco.com)
•Device manager online help (available on the switch)
•Catalyst 2950 Switch Hardware Installation Guide (not orderable but available on Cisco.com)
•Catalyst 2950 Switch Getting Started Guide (order number DOC-7816521=)

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Obtaining Documentation
•Regulatory Compliance and Safety Information for the Catalyst 2950 Switch (order number
DOC-7816625=)
•Catalyst 2955 Hardware Installation Guide (not orderable but available on Cisco.com)
For information about related products, see these documents:
•Catalyst GigaStack Gigabit Interface Converter Hardware Installation Guide
(order number DOC-786460=)
•CWDM Passive Optical System Installation Note (not orderable but is available on Cisco.com)
•1000BASE-T Gigabit Interface Converter Installation Notes (not orderable but available on
Cisco.com)
•Cisco LRE CPE Hardware Installation Guide (order number DOC-7811469=)
•Installation and Warranty Notes for the Cisco LRE 48 POTS Splitter (order number
DOC-7812250=)
•Getting Started with Cisco Network Assistant (not orderable but available on Cisco.com)
•Release Notes for Cisco Network Assistant (not orderable but available on Cisco.com)
•Cisco Small Form-Factor Pluggable Modules Installation Notes (order number DOC-7815160=)
•Cisco CWDM GBIC and CWDM SFP Installation Note (not orderable but available on Cisco.com)
•For information about the Network Admission Control (NAC) features, see the Network Admission
Control Software Configuration Guide (not orderable but available on Cisco.com)
Obtaining Documentation
Cisco documentation and additional literature are available on Cisco.com. Cisco also provides several
ways to obtain technical assistance and other technical resources. These sections explain how to obtain
technical information from Cisco Systems.
Cisco.com
You can access the most current Cisco documentation at this URL:
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You can access the Cisco website at this URL:
http://www.cisco.com
You can access international Cisco websites at this URL:
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Product Documentation DVD
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HTML documentation that is found on the Cisco website without being connected to the Internet.
Certain products also have .PDF versions of the documentation available.

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Documentation Feedback
The Product Documentation DVD is available as a single unit or as a subscription. Registered Cisco.com
users (Cisco direct customers) can order a Product Documentation DVD (product number
DOC-DOCDVD= or DOC-DOCDVD=SUB) from Cisco Marketplace at this URL:
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Ordering Documentation
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Cisco Product Security Overview
Cisco provides a free online Security Vulnerability Policy portal at this URL:
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From this site, you will find information about how to:
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•Register to receive security information from Cisco.
A current list of security advisories, security notices, and security responses for Cisco products is
available at this URL:
http://www.cisco.com/go/psirt

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Obtaining Technical Assistance
To see security advisories, security notices, and security responses as they are updated in real time, you
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Reporting Security Problems in Cisco Products
Cisco is committed to delivering secure products. We test our products internally before we release them,
and we strive to correct all vulnerabilities quickly. If you think that you have identified a vulnerability
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•For Emergencies only—[email protected]
An emergency is either a condition in which a system is under active attack or a condition for which
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•For Nonemergencies— [email protected]
In an emergency, you can also reach PSIRT by telephone:
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•1 408 525-6532
Tip We encourage you to use Pretty Good Privacy (PGP) or a compatible product (for example, GnuPG) to
encrypt any sensitive information that you send to Cisco. PSIRT can work with information that has been
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Never use a revoked or an expired encryption key. The correct public key to use in your correspondence
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The link on this page has the current PGP key ID in use.
If you do not have or use PGP, contact PSIRT at the aforementioned e-mail addresses or phone numbers
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Obtaining Technical Assistance
Cisco Technical Support provides 24-hour-a-day award-winning technical assistance. The Cisco
Technical Support & Documentation website on Cisco.com features extensive online support resources.
In addition, if you have a valid Cisco service contract, Cisco Technical Assistance Center (TAC)
engineers provide telephone support. If you do not have a valid Cisco service contract, contact your
reseller.

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Obtaining Technical Assistance
Cisco Technical Support & Documentation Website
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Note Use the Cisco Product Identification (CPI) tool to locate your product serial number before submitting
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Documentation website by clicking the Tools & Resources link under Documentation & Tools. Choose
Cisco Product Identification Tool from the Alphabetical Index drop-down list, or click the Cisco
Product Identification Tool link under Alerts & RMAs. The CPI tool offers three search options: by
product ID or model name; by tree view; or for certain products, by copying and pasting show command
output. Search results show an illustration of your product with the serial number label location
highlighted. Locate the serial number label on your product and record the information before placing a
service call.
Submitting a Service Request
Using the online TAC Service Request Tool is the fastest way to open S3 and S4 service requests. (S3
and S4 service requests are those in which your network is minimally impaired or for which you require
product information.) After you describe your situation, the TAC Service Request Tool provides
recommended solutions. If your issue is not resolved using the recommended resources, your service
request is assigned to a Cisco engineer. The TAC Service Request Tool is located at this URL:
http://www.cisco.com/techsupport/servicerequest
For S1 or S2 service requests, or if you do not have Internet access, contact the Cisco TAC by telephone.
(S1 or S2 service requests are those in which your production network is down or severely degraded.)
Cisco engineers are assigned immediately to S1 and S2 service requests to help keep your business
operations running smoothly.
To open a service request by telephone, use one of the following numbers:
Asia-Pacific: [phone] (Australia: 1 800 805 227)
EMEA: [phone]
USA: 1 800 553-2447
For a complete list of Cisco TAC contacts, go to this URL:
http://www.cisco.com/techsupport/contacts
Definitions of Service Request Severity
To ensure that all service requests are reported in a standard format, Cisco has established severity
definitions.