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Understanding CLI Messages, Using Command History, Changing the Command History Buffer Size

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Understanding CLI Messages Chapter 5 Using the Command-Line Interface 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. Understanding CLI Messages Table 5-3 lists some error messages that you might encounter while using the CLI to configure your access point. Table 5-3 Common CLI Error Messages Error Message Meaning How to Get Help % Ambiguous command: "show con" You did not enter enough characters Re-enter the command followed by a question mark (?) for your access point to recognize the with a space between the command and the question command. mark. The possible keywords that you can enter with the command are displayed. % Incomplete command. You did not enter all the keywords or Re-enter the command followed by a question mark (?) values required by this command. with a space between the command and the question mark. The possible keywords that you can enter with the command are displayed. % Invalid input detected You entered the command at '^' marker. incorrectly. The caret (^) marks the point of the error. Enter a question mark (?) to display all the commands that are available in this command mode. The possible keywords that you can enter with the command are displayed. Using Command History The Cisco IOS provides a history or record of commands that you have entered. This feature is particularly useful for recalling long or complex commands or entries, including access lists. You can customize the command history feature to suit your needs as described in these sections: • Changing the Command History Buffer Size, page 5-4 • Recalling Commands, page 5-5 • Disabling the Command History Feature, page 5-5 Changing the Command History Buffer Size By default, the access point records ten command lines in its history buffer. Beginning in privileged EXEC mode, enter this command to change the number of command lines that the access point records during the current terminal session: ap# terminal history [size number-of-lines] Cisco Aironet 1200 Series Access Point Hardware Installation Guide 5-4 OL-4310-05

Section	Page
Cisco Aironet 1200 Series Access Point Hardware Installation Guide	1
Contents	3
Preface	9
Audience	9
Purpose	9
Organization	9
Conventions	10
Related Publications	12
Obtaining Documentation	12
Cisco.com	13
Product Documentation DVD	13
Ordering Documentation	13
Documentation Feedback	14
Cisco Product Security Overview	14
Reporting Security Problems in Cisco Products	14
Obtaining Technical Assistance	15
Cisco Technical Support & Documentation Website	15
Locating the Product Serial Number	16
Submitting a Service Request	16
Definitions of Service Request Severity	17
Obtaining Additional Publications and Information	17
Overview	19
Hardware Features	20
Dual-Radio Operation	20
LEDs	21
Ethernet Port	21
Console Port	22
Power Sources	22
UL 2043 Certification	22
Anti-Theft Features	23
Network Configuration Examples	23
Central Unit in an All-Wireless Network	23
Root Access Point on a Wired LAN	24
Repeater Unit that Extends Wireless Range	25
Point-to-Point Bridge Configuration	25
Workgroup Bridge Configuration	26
Installing the Access Point	27
Safety Information	28
FCC Safety Compliance Statement	28
General Safety Guidelines	28
Warnings	28
Unpacking the Access Point	29
Package Contents	29
Basic Installation Guidelines	29
Installation Above Suspended Ceilings	30
Before Beginning the Installation	30
Installation Summary	32
Connecting the 2.4-GHz Antennas	32
Connecting the 5-GHz External Antennas	33
Connecting the Ethernet and Power Cables	34
Connecting to an Ethernet Network with an Inline Power Source	35
Connecting to an Ethernet Network with Local Power	35
Powering Up the Access Point	36
Configuring the Access Point for the First Time	37
Before You Start	38
Resetting the Access Point to Default Settings	38
Using the Mode Button	38
Using a Web-browser	38
Default IP Address Behavior	39
Obtaining and Assigning an IP Address	39
Connecting to the Access Point Locally	40
Assigning Basic Settings	40
Default Settings on the Express Setup Page	44
Enabling the Radio Interfaces	45
Configuring Basic Security Settings	45
Understanding Express Security Settings	47
Using VLANs	47
Express Security Types	47
Express Security Limitations	48
Using the Express Security Page	49
Assigning an IP Address Using the CLI	50
Using a Telnet Session to Access the CLI	50
Using the Web-Browser Interface	51
Using the Web-Browser Interface for the First Time	52
Using the Management Pages in the Web-Browser Interface	52
Using Action Buttons	54
Character Restrictions in Entry Fields	55
Using Online Help	55
Using the Command-Line Interface	57
Cisco IOS Command Modes	58
Getting Help	59
Abbreviating Commands	59
Using no and default Forms of Commands	59
Understanding CLI Messages	60
Using Command History	60
Changing the Command History Buffer Size	60
Recalling Commands	61
Disabling the Command History Feature	61
Using Editing Features	61
Enabling and Disabling Editing Features	62
Editing Commands Through Keystrokes	62
Editing Command Lines that Wrap	63
Searching and Filtering Output of show and more Commands	64
Accessing the CLI	64
Opening the CLI with Telnet	64
Opening the CLI with Secure Shell	65
Mounting Instructions	67
Overview	68
Mounting on a Horizontal or Vertical Surface	69
Mounting Below a Suspended Ceiling	70
Mounting Above a Suspended Ceiling	71
Attaching the Access Point to the Mounting Bracket	73
Securing the Access Point to the Mounting Bracket	73
2.4-GHz Radio Upgrade	75
Upgrade Overview	76
Unpacking the Radio	76
Opening the Access Cover	77
Removing a Blank Spacer Card	78
Removing a 2.4-GHz Radio	79
Installing a 2.4-GHz Radio	81
Attaching the Compliance Labels	83
Placing the Labels	84
Finding the Software Version	84
5-GHz Radio Module Upgrade	85
Upgrade Overview	86
Unpacking the Radio Module	86
Removing the 5-GHz Radio Access Cover	86
Removing a 5-GHz Radio Module	87
Installing a 5-GHz Radio Module	89
Attaching the Compliance Label	91
Finding the Software Version	92
Troubleshooting	93
Checking the Top Panel LEDs	94
Checking Basic Settings	96
Default IP Address Behavior	96
Default SSID and Radio Behavior	96
Enabling the Radio Interfaces	96
SSID	97
WEP Keys	97
Security Settings	97
Running the Carrier Busy Test	97
Running the Ping or Link Test	98
Resetting to the Default Configuration	99
Using the MODE Button	99
Using the Web Browser Interface	100
Reloading the Access Point Image	100
Using the MODE button	101
Web Browser Interface	101
Browser HTTP Interface	102
Browser TFTP Interface	102
Obtaining the Access Point Image File	103
Obtaining the TFTP Server Software	104
Translated Safety Warnings	105
Statement 245B—Explosive Device Proximity Warning	106
Statement 332—Antenna Installation Warning	107
Statement 1001—Work During Lightning Activity Warning	108
Statement 1004—Installation Instructions Warning	109
Statement 1005—Circuit Breaker (20A) Warning	110
Declarations of Conformity and Regulatory Information	113
Manufacturers Federal Communication Commission Declaration of Conformity Statement	114
Department of Communications—Canada	115
Canadian Compliance Statement	115
European Community, Switzerland, Norway, Iceland, and Liechtenstein	116
Declaration of Conformity with Regard to the R&TTE Directive 1999/5/EC	116
Declaration of Conformity for RF Exposure	118
Guidelines for Operating Cisco Aironet Access Points in Japan	118
Japanese Translation	118
English Translation	119
Administrative Rules for Cisco Aironet Access Points in Taiwan	119
Access Points with IEEE 802.11a Radios	119
Chinese Translation	119
English Translation	119
All Access Points	120
Chinese Translation	120
English Translation	120
Operation of Cisco Aironet Access Points in Brazil	121
Access Point Model	121
Regulatory Information	121
Portuguese Translation	121
English Translation	121
Declaration of Conformity Statements	122
Declaration of Conformity Statements for European Union Countries	122
Access Point Specifications	131
Channels and Antenna Settings	137
Channels	138
IEEE 802.11b (2.4-GHz Band)	138
IEEE 802.11g (2.4-GHz Band)	139
IEEE 802.11a (5-GHz Band)	140
Maximum Power Levels and Antenna Gains	142
IEEE 802.11b (2.4-GHz Band)	142
IEEE 802.11g (2.4-GHz Band)	143
IEEE 802.11a (5-GHz Band)	144
Console Cable Pinouts	149
Overview	150
Console Port Signals and Pinouts	150
Glossary	151

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5-4

Cisco Aironet 1200 Series Access Point Hardware Installation Guide

OL-4310-05

Chapter 5

Using the Command-Line Interface

Understanding CLI Messages

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

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.

Understanding CLI Messages

Table 5-3

lists some error messages that you might encounter while using the CLI to configure your

access point.

Using Command History

The Cisco IOS provides a history or record of commands that you have entered. This feature is

particularly useful for recalling long or complex commands or entries, including access lists. You can

customize the command history feature to suit your needs as described in these sections:

•

Changing the Command History Buffer Size, page 5-4

•

Recalling Commands, page 5-5

•

Disabling the Command History Feature, page 5-5

Changing the Command History Buffer Size

By default, the access point records ten command lines in its history buffer. Beginning in privileged

EXEC mode, enter this command to change the number of command lines that the access point records

during the current terminal session:

ap#

terminal history

[

size

number-of-lines

]

Table 5-3

Common CLI Error Messages

Error Message

Meaning

How to Get Help

% Ambiguous command:

"show con"

You did not enter enough characters

for your access point to recognize the

command.

Re-enter 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 are displayed.

% Incomplete command.

You did not enter all the keywords or

values required by this command.

Re-enter 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 are displayed.

% Invalid input detected

at ‘^’ marker.

You entered the command

incorrectly. The caret (^) marks the

point of the error.

Enter a question mark (

) to display all the commands

that are available in this command mode.

The possible keywords that you can enter with the

command are displayed.