Cisco Catalyst 2960-X Installation manual

Catalyst 2960-X Switch Layer 2 Command Reference, Cisco IOS
Release 15.0(2)EX
First Published: July 10, 2013
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Text Part Number: OL-29043 -01

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CONTENTS
CHAPTER 1 Preface 1
Document Conventions 1
Related Documentation 3
Obtaining Documentation and Submitting a Service Request 3
CHAPTER 2 Using the Command-Line Interface 5
Information About Using the Command-Line Interface 5
Command Modes 5
Using the Help System 7
Understanding Abbreviated Commands 8
No and default Forms of Commands 8
CLI Error Messages 8
Configuration Logging 9
How to Use the CLI to Configure Features 9
Configuring the Command History 9
Changing the Command History Buffer Size 10
Recalling Commands 10
Disabling the Command History Feature 11
Enabling and Disabling Editing Features 11
Editing Commands through Keystrokes 13
Editing Command Lines That Wrap 14
Searching and Filtering Output of show and more Commands 15
Accessing the CLI through a Console Connection or through Telnet 16
CHAPTER 3 Layer 2 Commands 17
channel-group 20
channel-protocol 23
clear lacp 25
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clear pagp 26
clear spanning-tree counters 27
clear spanning-tree detected-protocols 28
debug etherchannel 29
debug lacp 31
debug pagp 32
debug platform etherchannel 34
debug platform pm 35
debug spanning-tree 38
debug platform udld 40
interface port-channel 41
lacp port-priority 43
lacp system-priority 45
link state group 47
link state track 48
pagp learn-method 49
pagp port-priority 51
pagp timer 53
port-channel load-balance 54
show etherchannel 55
show lacp 58
show link state group 63
show pagp 64
show platform backup interface 66
show platform etherchannel 67
show platform pm 68
show platform spanning-tree 70
show spanning-tree 71
show udld 74
spanning-tree backbonefast 77
spanning-tree bpdufilter 78
spanning-tree bpduguard 80
spanning-tree cost 81
spanning-tree etherchannel guard misconfig 83
spanning-tree extend system-id 84
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spanning-tree guard 86
spanning-tree link-type 88
spanning-tree loopguard default 89
spanning-tree mode 90
spanning-tree mst configuration 92
spanning-tree mst cost 94
spanning-tree mst forward-time 95
spanning-tree mst hello-time 96
spanning-tree mst max-age 97
spanning-tree mst max-hops 98
spanning-tree mst port-priority 99
spanning-tree mst pre-standard 100
spanning-tree mst priority 101
spanning-tree mst root 102
spanning-tree pathcost method 104
spanning-tree port-priority 105
spanning-tree portfast (global configuration) 106
spanning-tree portfast (interface configuration) 108
spanning-tree transmit hold-count 110
spanning-tree uplinkfast 111
spanning-tree vlan 113
switchport access vlan 115
switchport mode 116
switchport nonegotiate 119
udld 121
udld port 123
udld reset 125
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Preface
This preface contains the following topics:
•Document Conventions, page 1
•Related Documentation, page 3
•Obtaining Documentation and Submitting a Service Request, page 3
Document Conventions
This document uses the following conventions:
DescriptionConvention
Both the ^symbol and Ctrl represent the Control (Ctrl) key on a keyboard.
For example, the key combination ^D or Ctrl-D means that you hold
down the Control key while you press the D key. (Keys are indicated in
capital letters but are not case sensitive.)
^ or Ctrl
Commands and keywords and user-entered text appear in bold font.bold font
Document titles, new or emphasized terms, and arguments for which you
supply values are in italic font.
Italic font
Terminal sessions and information the system displays appear in courier
font.
Courier font
Bold Courier font indicates text that the user must enter.Bold Courier font
Elements in square brackets are optional.[x]
An ellipsis (three consecutive nonbolded periods without spaces) after
a syntax element indicates that the element can be repeated.
...
A vertical line, called a pipe, indicates a choice within a set of keywords
or arguments.
|
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DescriptionConvention
Optional alternative keywords are grouped in brackets and separated by
vertical bars.
[x | y]
Required alternative keywords are grouped in braces and separated by
vertical bars.
{x | y}
Nested set of square brackets or braces indicate optional or required
choices within optional or required elements. Braces and a vertical bar
within square brackets indicate a required choice within an optional
element.
[x {y | z}]
A nonquoted set of characters. Do not use quotation marks around the
string or the string will include the quotation marks.
string
Nonprinting characters such as passwords are in angle brackets.< >
Default responses to system prompts are in square brackets.[ ]
An exclamation point (!) or a pound sign (#) at the beginning of a line
of code indicates a comment line.
!, #
Reader Alert Conventions
This document uses the following conventions for reader alerts:
Means reader take note. Notes contain helpful suggestions or references to material not covered in the
manual.
Note
Means the following information will help you solve a problem.
Tip
Means reader be careful. In this situation, you might do something that could result in equipment damage
or loss of data.
Caution
Means the described action saves time. You can save time by performing the action described in the
paragraph.
Timesaver
Means reader be warned. In this situation, you might perform an action that could result in bodily
injury.
Warning
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Document Conventions

Related Documentation
Before installing or upgrading the switch, refer to the switch release notes.Note
•Catalyst 2960-X Switch documentation, located at:
http://www.cisco.com/go/cat2960x_docs
•Cisco SFP and SFP+ modules documentation, including compatibility matrixes, located at:
http://www.cisco.com/en/US/products/hw/modules/ps5455/tsd_products_support_series_home.html
•Cisco Validated Designs documents, located at:
http://www.cisco.com/go/designzone
Obtaining Documentation and Submitting a Service Request
For information on obtaining documentation, submitting a service request, and gathering additional information,
see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco
technical documentation, at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
Subscribe to the What's New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed
and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free
service and Cisco currently supports RSS version 2.0.
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Related Documentation

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Preface
Obtaining Documentation and Submitting a Service Request