Transcript Fundamentals of Wireless LANs 1.2

Fundamentals of Wireless LANs 1.2
Module 5: Access Points
Overview
Access Point Connection
Introduction
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)
Cable and Power
• WARNING Never connect both the DC
power to the AP power port and inline
power simultaneously
AP Installation
LED indicators
1100 AP
1200 AP
• 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.
Reset the AP (Power On)
1100 AP
1200 AP
• 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.
Reset the AP (Power On)
350 AP
• 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.
Connecting to the AP (Configuration)
Wired
Wireless: Requires Association
Connecting to the AP (Configuration)
10.0.0.102/24
)
)
10.0.0.1/24
) ))
10.0.0.101/24
• Console: 9600-8-N-1-None
OR
• Ethernet or Wireless adapter:
– Unless routed, be sure it is on the IP addresses are same subnet.
Connecting to the AP
(Console)
Serial
Console
Rollover Cable
IOS CLI
VxMenu
• There are two different types of CLI:
– IOS CLI
– VxMenu  No longer supported. YES!!!
Connecting to the AP
(Telnet)
Cisco
• 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.
Requires a network connection either Ethernet or Wireless
Connecting to the AP (Browser)
Preferred Method!
Wired
Wireless: Requires Association
Connecting to the AP (Wireless)
SSID = tsunami
SSID = tsunami
• 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  Not after 12.x
• SSID = tsunami IOS 12.x and later do not have a default SSID
• Password = Cisco (“C” not “c”)
Connecting to the AP (Wireless) cont.
• After IOS version 12.3(7)JA, Cisco access
points no longer have a default SSID or default
IP address on the BVI.
• You will have to log in via the console using
Cisco/Cisco and create an SSID and IP address
if you want to telnet/ssh or connect to the AP via
the web interface.
• Cisco introduced global-mode SSID
configuration in Cisco IOS Release 12.3(2)JA to
simplify configuration of SSID parameters under
multiple interfaces.
Connecting to the AP (Wired)
SSID = tsunami
10.0.0.1/27
SSID = tsunami
10.0.0.102/27
Preferred Method!
• Wired Ethernet:
– No association necessary
– Make sure the IP Address on the Ethernet interface is
on the same subnet as the AP.
See previous slide
– AP Defaults
• IP Address = 10.0.0.1 255.255.255.224
• Password = Cisco (“C” not “c”)
Labs and Station Connectivity
Configuring
AP1 is easy!
Hey, what
happened to my
settings on AP2!
AP1
10.0.0.1
AP2
10.0.0.1
• 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.
Configuring IP Addresses
Wired
Wireless
Configuring IP Addresses
224
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)
Access the AP via the Browser
/27
10.0.0.1
Cisco
Two things to change
SSID: AP-Pod1
Ex: 192.168.1.1/24
Ex: 192.168.1.2/27
Hostname
Not SSID
224
• 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.
Cisco AP Factory Default Settings
255.255.255.224 (/27)
This does not apply to access points running IOS version 12.3(7)JA or newer
Basic Configuration
The labs will really help you
understand this.
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 the wired LAN.
The IPSU must be installed on the computer 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.
Navigating the GUI
Home Summary Page (IOS)
MAC addresses
returned when pinging
the AP from wired or
wireless client.
Rec.
Trans.
SA/DA/BSSID
Express Setup
• Always configure
and test the basics
first, before
configuring
authentication and
other options.
Using the CLI
• Almost exactly
the same as
using the Router
IOS.
The AP’s IP address
• Same IP address whether you are
connecting via the wired or wireless
interface. (For configuring the AP.)
Association
or
Click here…
Association -> MAC Address
ACU - Verifying
Right click
Link Test
Link Status
Network Interfaces
Only part of the screen shown.
Network Interfaces
Network Interfaces – Fast Ethernet
Only part of the screen shown.
Network Interfaces – Radio-802.11B
Only part of the screen shown.
Network Interfaces – Radio-802.11B
Only part of the screen shown.
Network Interfaces – Radio802.11B
Only part of the screen shown.
Network Interfaces – Radio802.11B (Settings)
Network Interfaces – Radio802.11B (Settings)
Network Interfaces – Radio802.11B (Settings)
Network Interfaces – Radio-802.11B
(Settings)
PLCP
frame!
Network Interfaces – Radio-802.11B
(Settings)
Network Interfaces – 802.11b
Network
Interfaces –
Radio-802.11B
802.11B
Network Interfaces – Radio-802.11A
(Settings)
802.11a
contains
some slightly
different
options
Only part of the screen
Services
Services
• The Services Summary page shows
whether all of the main services are
currently enabled or disabled.
Telnet/SSH
Hot Standby
• We will not be
configuring Hot
Standby
CDP
DNS
Filters
• Allows you to accept/deny specific MAC or
IP addresses.
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 webbased 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
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]\wireless\help
Proxy Mobile IP
• Allows Layer 3 Roaming
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.
SNMP – Not covered
NTP