Cisco Catalyst 3650 Installation manual

Layer 2/3 Command Reference, Cisco IOS XE Release 3.6E (Catalyst
3650 Switch)
First Published: June 27, 2014
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Tel: [phone]
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Fax: [phone]
Text Part Number: OL-32639-01

©2014 Cisco Systems, Inc. All rights reserved.

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
Understanding Abbreviated Commands 7
No and Default Forms of Commands 7
CLI Error Messages 8
Configuration Logging 8
Using the Help System 8
How to Use the CLI to Configure Features 10
Configuring the Command History 10
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 on a Switch Stack 16
Accessing the CLI Through a Console Connection or Through Telnet 16
CHAPTER 3 Layer 2/3 Commands 17
channel-group 19
channel-protocol 22
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clear lacp 24
clear pagp 25
clear spanning-tree counters 26
clear spanning-tree detected-protocols 27
debug etherchannel 29
debug lacp 31
debug pagp 32
debug platform pm 34
debug platform udld 36
debug spanning-tree 37
interface port-channel 39
lacp max-bundle 41
lacp port-priority 42
lacp system-priority 44
pagp learn-method 46
pagp port-priority 48
port-channel load-balance 50
port-channel load-balance extended 52
port-channel min-links 54
show etherchannel 56
show lacp 59
show pagp 64
show platform etherchannel 66
show platform pm 67
show udld 68
switchport 72
switchport access vlan 74
switchport mode 75
switchport nonegotiate 78
udld 80
udld port 82
udld reset 84
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Contents

Preface
•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.
|
Optional alternative keywords are grouped in brackets and separated by vertical
bars.
[x | y]
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DescriptionConvention
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 may use 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
IMPORTANT SAFETY INSTRUCTIONS
This warning symbol means danger. You are in a situation that could cause bodily injury. Before you
work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with
standard practices for preventing accidents. Use the statement number provided at the end of each warning
to locate its translation in the translated safety warnings that accompanied this device. Statement 1071
SAVE THESE INSTRUCTIONS
Warning
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Preface
Document Conventions

Related Documentation
Before installing or upgrading the switch, refer to the switch release notes.Note
•Cisco Catalyst 3650 Switch documentation, located at:
http://www.cisco.com/go/cat3650_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
•Error Message Decoder, located at:
https://www.cisco.com/cgi-bin/Support/Errordecoder/index.cgi
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/c/en/us/td/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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Preface
Related Documentation

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Preface
Obtaining Documentation and Submitting a Service Request

Using the Command-Line Interface
•Information About Using the Command-Line Interface, page 5
•How to Use the CLI to Configure Features, page 10
Information About Using the Command-Line Interface
Command Modes
The Cisco IOS user interface is divided into many different modes. The commands available to you depend
on which mode you are currently in. Enter a question mark (?) at the system prompt to obtain a list of commands
available for each command mode.
You can start a CLI session through a console connection, through Telnet, a SSH, or by using the browser.
When you start a session, you begin in user mode, often called user EXEC mode. Only a limited subset of
the commands are available in user EXEC mode. For example, most of the user EXEC commands are one-time
commands, such as show commands, which show the current configuration status, and clear commands,
which clear counters or interfaces. The user EXEC commands are not saved when the switch reboots.
To have access to all commands, you must enter privileged EXEC mode. Normally, you must enter a password
to enter privileged EXEC mode. From this mode, you can enter any privileged EXEC command or enter
global configuration mode.
Using the configuration modes (global, interface, and line), you can make changes to the running configuration.
If you save the configuration, these commands are stored and used when the switch reboots. To access the
various configuration modes, you must start at global configuration mode. From global configuration mode,
you can enter interface configuration mode and line configuration mode.
This table describes the main command modes, how to access each one, the prompt you see in that mode, and
how to exit the mode.
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Table 1: Command Mode Summary
About This ModeExit MethodPromptAccess MethodMode
Use this mode to
•Change
terminal
settings.
•Perform basic
tests.
•Display system
information.
Enter logout or
quit.
Switch>
Begin a session
using Telnet, SSH,
or console.
User EXEC
Use this mode to
verify commands
that you have
entered. Use a
password to protect
access to this mode.
Enter disable
to exit.
Switch#
While in user
EXEC mode, enter
the enable
command.
Privileged EXEC
Use this mode to
configure parameters
that apply to the
entire switch.
To exit to
privileged
EXEC mode,
enter exit or
end, or press
Ctrl-Z.
Switch(config)#
While in privileged
EXEC mode, enter
the configure
command.
Global
configuration
Use this mode to
configure VLAN
parameters. When
VTP mode is
transparent, you can
create
extended-range
VLANs (VLAN IDs
greater than 1005)
and save
configurations in the
switch startup
configuration file.
To exit to
global
configuration
mode, enter the
exit command.
To return to
privileged
EXEC mode,
press Ctrl-Z or
enter end.
Switch(config-vlan)#
While in global
configuration
mode, enter the
vlan vlan-id
command.
VLAN
configuration
Use this mode to
configure parameters
for the Ethernet
ports.
Switch(config-if)#
While in global
configuration
mode, enter the
interface command
(with a specific
interface).
Interface
configuration
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Using the Command-Line Interface
Command Modes

About This ModeExit MethodPromptAccess MethodMode
To exit to
global
configuration
mode, enter
exit.
To return to
privileged
EXEC mode,
press Ctrl-Z or
enter end.
Use this mode to
configure parameters
for the terminal line.
To exit to
global
configuration
mode, enter
exit.
To return to
privileged
EXEC mode,
press Ctrl-Z or
enter end.
Switch(config-line)#
While in global
configuration
mode, specify a line
with the line vty or
line console
command.
Line configuration
Understanding Abbreviated Commands
You need to enter only enough characters for the switch to recognize the command as unique.
This example shows how to enter the show configuration privileged EXEC command in an abbreviated form:
Switch# show conf
No and Default Forms of Commands
Almost every configuration command also has a no form. In general, use the no form to disable a feature or
function or reverse the action of a command. For example, the no shutdown interface configuration command
reverses the shutdown of an interface. Use the command without the keyword no to reenable a disabled feature
or to enable a feature that is disabled by default.
Configuration commands can also have a default form. The default form of a command returns the command
setting to its default. Most commands are disabled by default, so the default form is the same as the no form.
However, some commands are enabled by default and have variables set to certain default values. In these
cases, the default command enables the command and sets variables to their default values.
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Using the Command-Line Interface
Understanding Abbreviated Commands

CLI Error Messages
This table lists some error messages that you might encounter while using the CLI to configure your switch.
Table 2: Common CLI Error Messages
How to Get HelpMeaningError Message
Reenter the command followed by
a question mark (?) without any
space between the command and
the question mark.
The possible keywords that you can
enter with the command appear.
You did not enter enough
characters for your switch to
recognize the command.
% Ambiguous command: "show
con"
Reenter the command followed by
a question mark (?) with a space
between the command and the
question mark.
The possible keywords that you can
enter with the command appear.
You did not enter all of the
keywords or values required by this
command.
% Incomplete command.
Enter a question mark (?) to display
all of the commands that are
available in this command mode.
The possible keywords that you can
enter with the command appear.
You entered the command
incorrectly. The caret (^) marks the
point of the error.
% Invalid input detected at
‘^’marker.
Configuration Logging
You can log and view changes to the switch configuration. You can use the Configuration Change Logging
and Notification feature to track changes on a per-session and per-user basis. The logger tracks each
configuration command that is applied, the user who entered the command, the time that the command was
entered, and the parser return code for the command. This feature includes a mechanism for asynchronous
notification to registered applications whenever the configuration changes. You can choose to have the
notifications sent to the syslog.
Only CLI or HTTP changes are logged.Note
Using the Help System
You can enter a question mark (?) at the system prompt to display a list of commands available for each
command mode. You can also obtain a list of associated keywords and arguments for any command.
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Using the Command-Line Interface
CLI Error Messages

SUMMARY STEPS
1. help
2. abbreviated-command-entry ?
3. abbreviated-command-entry <Tab>
4. ?
5. command ?
6. command keyword ?
DETAILED STEPS
PurposeCommand or Action
Obtains a brief description of the help system in any
command mode.
help
Example:
Switch# help
Step 1
Obtains a list of commands that begin with a particular
character string.
abbreviated-command-entry ?
Example:
Switch# di?
dir disable disconnect
Step 2
Completes a partial command name.
abbreviated-command-entry <Tab>
Example:
Switch# sh conf<tab>
Switch# show configuration
Step 3
Lists all commands available for a particular command
mode.
?
Example:
Switch> ?
Step 4
Lists the associated keywords for a command.
command ?
Example:
Switch> show ?
Step 5
Lists the associated arguments for a keyword.
command keyword ?
Example:
Switch(config)# cdp holdtime ?
<10-255> Length of time (in sec) that receiver
Step 6
must keep this packet
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Using the Command-Line Interface
Using the Help System

How to Use the CLI to Configure Features
Configuring the Command History
The software provides a history or record of commands that you have entered. The command history feature
is particularly useful for recalling long or complex commands or entries, including access lists. You can
customize this feature to suit your needs.
Changing the Command History Buffer Size
By default, the switch records ten command lines in its history buffer. You can alter this number for a current
terminal session or for all sessions on a particular line. This procedure is optional.
SUMMARY STEPS
1. terminal history [size number-of-lines]
DETAILED STEPS
PurposeCommand or Action
Changes the number of command lines that the switch records during
the current terminal session in privileged EXEC mode. You can
configure the size from 0 to 256.
terminal history [size number-of-lines]
Example:
Switch# terminal history size 200
Step 1
Recalling Commands
To recall commands from the history buffer, perform one of the actions listed in this table. These actions are
optional.
The arrow keys function only on ANSI-compatible terminals such as VT100s.Note
SUMMARY STEPS
1. Ctrl-P or use the up arrow key
2. Ctrl-N or use the down arrow key
3. show history
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How to Use the CLI to Configure Features

DETAILED STEPS
PurposeCommand or Action
Recalls commands in the history buffer, beginning with the most recent command.
Repeat the key sequence to recall successively older commands.
Ctrl-P or use the up arrow key
Step 1
Returns to more recent commands in the history buffer after recalling commands
with Ctrl-P or the up arrow key. Repeat the key sequence to recall successively
more recent commands.
Ctrl-N or use the down arrow key
Step 2
Lists the last several commands that you just entered in privileged EXEC mode.
The number of commands that appear is controlled by the setting of the terminal
show history
Example:
Switch# show history
Step 3
history global configuration command and the history line configuration
command.
Disabling the Command History Feature
The command history feature is automatically enabled. You can disable it for the current terminal session or
for the command line. This procedure is optional.
SUMMARY STEPS
1. terminal no history
DETAILED STEPS
PurposeCommand or Action
Disables the feature during the current terminal session in
privileged EXEC mode.
terminal no history
Example:
Switch# terminal no history
Step 1
Enabling and Disabling Editing Features
Although enhanced editing mode is automatically enabled, you can disable it and reenable it.
SUMMARY STEPS
1. terminal editing
2. terminal no editing
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Using the Command-Line Interface
Enabling and Disabling Editing Features

DETAILED STEPS
PurposeCommand or Action
Reenables the enhanced editing mode for the current terminal
session in privileged EXEC mode.
terminal editing
Example:
Switch# terminal editing
Step 1
Disables the enhanced editing mode for the current terminal
session in privileged EXEC mode.
terminal no editing
Example:
Switch# terminal no editing
Step 2
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Enabling and Disabling Editing Features

Editing Commands Through Keystrokes
The keystrokes help you to edit the command lines. These keystrokes are optional.
The arrow keys function only on ANSI-compatible terminals such as VT100s.Note
Table 3: Editing Commands
DescriptionEditing Commands
Moves the cursor back one character.Ctrl-B or use the left arrow key
Moves the cursor forward one character.Ctrl-F or use the right arrow key
Moves the cursor to the beginning of the command
line.
Ctrl-A
Moves the cursor to the end of the command line.Ctrl-E
Moves the cursor back one word.Esc B
Moves the cursor forward one word.Esc F
Transposes the character to the left of the cursor with
the character located at the cursor.
Ctrl-T
Erases the character to the left of the cursor.Delete or Backspace key
Deletes the character at the cursor.Ctrl-D
Deletes all characters from the cursor to the end of
the command line.
Ctrl-K
Deletes all characters from the cursor to the beginning
of the command line.
Ctrl-U or Ctrl-X
Deletes the word to the left of the cursor.Ctrl-W
Deletes from the cursor to the end of the word.Esc D
Capitalizes at the cursor.Esc C
Changes the word at the cursor to lowercase.Esc L
Capitalizes letters from the cursor to the end of the
word.
Esc U
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Using the Command-Line Interface
Enabling and Disabling Editing Features

Designates a particular keystroke as an executable
command, perhaps as a shortcut.
Ctrl-V or Esc Q
Scrolls down a line or screen on displays that are
longer than the terminal screen can display.
The More prompt is used for any output that
has more lines than can be displayed on the
terminal screen, including show command
output. You can use the Return and Space
bar keystrokes whenever you see the More
prompt.
Note
Return key
Scrolls down one screen.Space bar
Redisplays the current command line if the switch
suddenly sends a message to your screen.
Ctrl-L or Ctrl-R
Editing Command Lines That Wrap
You can use a wraparound feature for commands that extend beyond a single line on the screen. When the
cursor reaches the right margin, the command line shifts ten spaces to the left. You cannot see the first ten
characters of the line, but you can scroll back and check the syntax at the beginning of the command. The
keystroke actions are optional.
To scroll back to the beginning of the command entry, press Ctrl-B or the left arrow key repeatedly. You can
also press Ctrl-A to immediately move to the beginning of the line.
The arrow keys function only on ANSI-compatible terminals such as VT100s.Note
The following example shows how to wrap a command line that extends beyond a single line on the screen.
SUMMARY STEPS
1. access-list
2. Ctrl-A
3. Return key
DETAILED STEPS
PurposeCommand or Action
Displays the global configuration command entry that extends beyond
one line.
access-list
Example:
Switch(config)# access-list 101 permit tcp
Step 1
When the cursor first reaches the end of the line, the line is shifted ten
spaces to the left and redisplayed. The dollar sign ($) shows that the
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Enabling and Disabling Editing Features

PurposeCommand or Action
line has been scrolled to the left. Each time the cursor reaches the end
of the line, the line is again shifted ten spaces to the left.
10.15.22.25 255.255.255.0 10.15.22.35
Switch(config)# $ 101 permit tcp
10.15.22.25 255.255.255.0 10.15.22.35
255.25
Switch(config)# $t tcp 10.15.22.25
255.255.255.0 131.108.1.20 255.255.255.0
eq
Switch(config)# $15.22.25 255.255.255.0
10.15.22.35 255.255.255.0 eq 45
Checks the complete syntax.Ctrl-A
Step 2
Example:
Switch(config)# access-list 101 permit tcp
10.15.22.25 255.255.255.0 10.15.2$
The dollar sign ($) appears at the end of the line to show that the line
has been scrolled to the right.
Execute the commands.Return key
Step 3
The software assumes that you have a terminal screen that is 80 columns
wide. If you have a different width, use the terminal width privileged
EXEC command to set the width of your terminal.
Use line wrapping with the command history feature to recall and
modify previous complex command entries.
Searching and Filtering Output of show and more Commands
You can search and filter the output for show and more commands. This is useful when you need to sort
through large amounts of output or if you want to exclude output that you do not need to see. Using these
commands is optional.
SUMMARY STEPS
1. {show |more}command | {begin |include |exclude}regular-expression
DETAILED STEPS
PurposeCommand or Action
Searches and filters the output.
{show |more}command | {begin |include |exclude}
regular-expression
Step 1
Expressions are case sensitive. For example, if you enter
| exclude output, the lines that contain output are not
displayed, but the lines that contain output appear.
Example:
Switch# show interfaces | include protocol
Vlan1 is up, line protocol is up
Vlan10 is up, line protocol is down
GigabitEthernet1/0/1 is up, line protocol is down
GigabitEthernet1/0/2 is up, line protocol is up
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Using the Command-Line Interface
Searching and Filtering Output of show and more Commands

Accessing the CLI on a Switch Stack
You can access the CLI through a console connection, through Telnet, a SSH, or by using the browser.
You manage the switch stack and the stack member interfaces through the active switch. You cannot manage
stack members on an individual switch basis. You can connect to the active switch through the console port
or the Ethernet management port of one or more stack members. Be careful with using multiple CLI sessions
on the active switch. Commands that you enter in one session are not displayed in the other sessions. Therefore,
it is possible to lose track of the session from which you entered commands.
We recommend using one CLI session when managing the switch stack.Note
If you want to configure a specific stack member port, you must include the stack member number in the CLI
command interface notation.
To debug the standby switch, use the session standby ios privileged EXEC command from the active switch
to access the IOS console of the standby switch. To debug a specific stack member, use the session switch
stack-member-number privileged EXEC command from the active switch to access the diagnostic shell of
the stack member. For more information about these commands, see the switch command reference.
Accessing the CLI Through a Console Connection or Through Telnet
Before you can access the CLI, you must connect a terminal or a PC to the switch console or connect a PC to
the Ethernet management port and then power on the switch, as described in the hardware installation guide
that shipped with your switch.
If your switch is already configured, you can access the CLI through a local console connection or through a
remote Telnet session, but your switch must first be configured for this type of access.
You can use one of these methods to establish a connection with the switch:
•Connect the switch console port to a management station or dial-up modem, or connect the Ethernet
management port to a PC. For information about connecting to the console or Ethernet management
port, see the switch hardware installation guide.
•Use any Telnet TCP/IP or encrypted Secure Shell (SSH) package from a remote management station.
The switch must have network connectivity with the Telnet or SSH client, and the switch must have an
enable secret password configured.
•The switch supports up to 16 simultaneous Telnet sessions. Changes made by one Telnet user are
reflected in all other Telnet sessions.
•The switch supports up to five simultaneous secure SSH sessions.
After you connect through the console port, through the Ethernet management port, through a Telnet
session or through an SSH session, the user EXEC prompt appears on the management station.
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