Cisco Fundamentals of Wireless LANs Ch. 05 – Access Points Yaser Rahmati | یاسر رحمتی Rahmati Academy | آکادمی رحمتی www.yaser-rahmati.ir www.rahmati-academy.ir

1. Ch. 5 – Access Points
Cisco Fundamentals of Wireless LANs version 1.1
Rick Graziani
Cabrillo College

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Overview

3. Access Point Connection

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Introduction

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Radio Upgrade
802.11g chip now
shipping

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Cable and
Power
• Cisco Aironet 1100 and 1200 Series, can be powered over Ethernet
with:
– Switch with inline power (Option 1)
– Inline power patch panel (Option 2)
– Optional inline power injector (Option3)
– Universal power supply (Option 4)

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Cable and Power
• WARNING Never connect both the DC power to the AP
power port and inline power simultaneously

8. AP Installation

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LED indicators
• The LED lights on an access point convey status information.
• When the access point is powering on, all three LEDs normally blink.
• After bootup, the colors of the LEDs represent the following:
– Green LEDs indicate normal activity.
– Amber LEDs indicate errors or warnings.
– Red LEDs mean the unit is not operating correctly or is being
upgraded.
1100 AP 1200 AP

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Reset the AP (Power On)
• When beginning a lab, to make sure the AP has the default settings,
you will reset the AP.
• Follow these steps to reset the access point to factory default
settings using the access point MODE button:
• Step 1 Disconnect power (the power jack for external power or the
Ethernet cable for in-line power) from the access point.
• Step 2 Press and hold the MODE button while power to the access
point is reconnected.
• Step 3 Hold the MODE button until the Status LED turns amber
(approximately 1 to 2 seconds), and release the button. All access
point settings return to factory defaults.
1100 AP 1200 AP

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Reset the AP (Power On)
• The Reset button on the 340 and 350 AP is in a small hole on the back
panel of the base station.
• To activate the Reset button, insert a straightened paper clip into the
small hole and press.
• Remove the paper clip.
• The Status LED blinks amber to show the base station has the
default parameter values.
350 AP

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Connecting to the AP (Configuration)
Wired Wireless: Requires Association

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Connecting to the AP (Configuration)
• Console: 9600-8-N-1-None
OR
• Ethernet or Wireless adapter:
– Unless routed, be sure it is on the IP addresses are same subnet.
) ) ) ))
10.0.0.101/24
10.0.0.1/24
10.0.0.102/24

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Connecting to the AP
(Console)
• There are two different types of CLI:
– IOS CLI
– VxMenu
Console
Serial
Rollover Cable
VxMenu
IOS CLI

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Connecting to the AP
(Telnet)
Requires a network connection either Ethernet or Wireless
• AP Defaults
– IP Address = 10.0.0.1/24
– Username and Password =
Cisco (“C” not “c”)
– This password is the
privilege password, not the
WEP password.
Cisco

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Connecting to the AP (Browser)
Wired Wireless: Requires Association
Preferred Method!

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Connecting to the AP (Wireless)
• Wireless adapter:
– If configuring using the wireless adapter, you must first associate
with the AP.
– Make sure the settings on the ACU match the AP.
– Cisco 1100 and 1200 Aps have the following defaults:
• IP Address = 10.0.0.1 255.255.255.224
• SSID = tsunami
• Password = Cisco (“C” not “c”)
SSID = tsunami
SSID = tsunami

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Connecting to the AP (Wired)
• Wired Ethernet:
– No association necessary
– Make sure the IP Address on the Ethernet interface is on the same
subnet as the AP.
– AP Defaults
• IP Address = 10.0.0.1 255.255.255.224
• Password = Cisco (“C” not “c”)
Preferred Method!
SSID = tsunami
SSID = tsunami
/27

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Connecting to the AP (Wired)
• Wired Ethernet:
– We will use the browser via wired method to initially configure
APs during labs so we do not configure the wrong AP via wireless.
• VxMenu – Won’t use
• IOS CLI – Optional, but you can do those labs if you wish. We
will cover some of the basic commands.
Preferred Method!
SSID = tsunami
SSID = tsunami
/27

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Labs and Station Connectivity
• In the lab we will need to take steps to make sure you are configuring
and connected to the AP that you think you are!
• We will first connect via a wired interface, change the SSID and IP
addressing on the AP, different from what the labs show.
AP1
AP2
Hey, what
happened to my
settings on AP2!
Configuring
AP1 is easy!
10.0.0.1
10.0.0.1

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Wired Wireless
Configuring IP Addresses

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Configuring IP Addresses
Configuring the IP address on Host’s Ethernet interface
Note: /24 will work because the host still believes it is on
the same subnet as the AP (and visa versa)
224

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Access the AP via the Browser
Cisco
10.0.0.1
/27

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Two things to change
• At the beginning of each lab, after you have connected via the wired Ethernet
interface, you will change the IP Address and SSID on the AP, so the other
Lab Station does not accidentally configure yours.
• You will also need to change your Host’s IP address.
Ex: 192.168.1.1/24 Ex: 192.168.1.2/27
SSID: AP-Pod1
Hostname
Not SSID
224

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Cisco AP Factory Default Settings
255.255.255.224 (/27)

26. Basic Configuration
The labs will really help you understand this.

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Configure IP address and SSID with IPSU
• IP Setup Utility (IPSU) can only change the IP address and SSID of the
access point from their default settings .
• After the IP address and SSID have been changed, IPSU cannot change
them again unless the mode button is held down.
• Use a computer on the wired LAN to communicate with the AP through a hub
on the wired LAN.
• The IPSU must be installed on the computer as well as on the same subnet
as the AP.
• IPSU uses IP multicast to communicate with the AP
• We will not use IPSU.
• See 5.2.1 if you are interested.

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Navigating the GUI

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Navigating the GUI
• By Default, Help is via the Internet.

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Home Summary Page (IOS)
BSSID
MAC addresses
returned when pinging
the AP from wired or
wireless client.
Rec. Trans. SA/DA/BSSID

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Express Setup
• Always configure
and test the
basics first, before
configuring
authentication and
other options.

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VxWorks

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Using the CLI
• Almost exactly the
same as using the
Router IOS.

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The AP’s IP address
• Same IP address whether you are connecting via the wired
or wireless interface. (For configuring the AP.)

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Association
or
Click here…

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Association -> MAC Address

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Association (VxWorks)

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ACU - Verifying
Right click

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Show Connection Status

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Link Test

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Link Status

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Network Interfaces
Only part of the screen shown.

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Network Interfaces

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Network Interfaces – Fast Ethernet
Only part of the screen shown.

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Network Interfaces – Radio-802.11B
Only part of the screen shown.

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Network Interfaces – Radio-802.11B
Only part of the screen shown.

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Network Interfaces – Radio-802.11B
Only part of the screen shown.

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Network Interfaces – Radio-802.11B
(Settings)

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Network Interfaces – Radio-802.11B
(Settings)

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Network Interfaces – Radio-802.11B
(Settings)

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Network Interfaces – Radio-802.11B
(Settings)
PLCP
frame!

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Network Interfaces – Radio-802.11B
(Settings)

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Network Interfaces – Radio-802.11B
(Settings)

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Network Interfaces –
Radio-802.11B
(Settings)

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Network Interfaces –
Radio-802.11B
(Settings)

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Network Interfaces – Radio-802.11A
(Settings)
Only part of the screen shown.
802.11a
contains
some slightly
different
options

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58. Services

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Services
• The Services Summary page shows whether all of the
main services are currently enabled or disabled.

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Telnet/SSH

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Hot Standby
• We will not be configuring
Hot Standby

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CDP

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DNS

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Filters
• Allows you to accept/deny specific MAC or IP addresses.

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HTTP
• This feature enables Web-based GUI management by providing support for
HTML Web pages and Common Gateway Interface (CGI) scripts using
common Web browsers.
• The Services>Web Server page is used to enable browsing to the web-based
management system, specify the location of the Help files, and enter
settings for a custom-tailored web system for management.
• With the Allow Web-based Configuration Management enabled, access to the
GUI management system is permitted.
• If HTTP is disabled, the management system is accessible only through Telnet
or the console

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HTTP – Help Files
• Hard Drive - The help files can be copied to the hard drive of the
computer which is used to manage the wireless LAN. Go to
http://www.cisco.com/public/sw-center/sw-wireless.shtml to download
the help files for the particular release. The readme.txt file explains how
to download the help files to the hard drive. This URL starting with file://
may not be accessible if the security settings of the browser are not set
appropriately. Example:
• file://[Drive letter]:[folder or subdirectory]wirelesshelp

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Proxy Mobile IP
• Allows Layer 3 Roaming
• More later.

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QoS – Not Covered
• QoS is disabled by default.
• The most important guideline in QoS deployment is to be familiar with
the traffic on the wireless LAN.
• It is important to know the applications used by wireless client devices,
the delay sensitivity of the applications, and the amount of traffic
associated with the applications.
• QoS does not create additional bandwidth for the wireless LAN.
• Rather it helps control the allocation of bandwidth. If there is adequate
bandwidth on the WLAN, QoS may not be needed.

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SNMP – Not covered

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NTP

71. Wireless Services

72. Ch. 5 – Access Points
Cisco Fundamentals of Wireless LANs version 1.1
Rick Graziani
Cabrillo College