Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide, Release 2.5
Chapter 7 - Viewing Status and Statistics
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Viewing Status and Statistics

Table Of Contents

Viewing Status and Statistics

Overview of ADU Status and Statistics Tools

Setting Parameters that Affect ADU Status and Statistics Tools

Viewing the Current Status of Your Client Adapter

Viewing Statistics for Your Client Adapter


Viewing Status and Statistics


This chapter explains how to use ADU to view the client adapter's status and its transmit and receive statistics.

The following topics are covered in this chapter:

Overview of ADU Status and Statistics Tools

Setting Parameters that Affect ADU Status and Statistics Tools

Viewing the Current Status of Your Client Adapter

Viewing Statistics for Your Client Adapter

Overview of ADU Status and Statistics Tools

In addition to enabling you to configure your client adapter for use in various types of networks, ADU provides tools that enable you to assess the performance of the client adapter and other devices on the wireless network. These tools perform the following functions:

Display your client adapter's current status and configured settings

Display statistics pertaining to your client adapter's transmission and reception of data

Table 7-1 enables you to quickly find instructions for using ADU status and statistics tools.

Table 7-1 Status and Statistics Tool Instructions

Tool
Page Number

Status

page 4

Statistics

page 12

Setting Parameters that Affect ADU Status and Statistics Tools

Several parameters affect the operation of ADU status and statistics tools. Follow these steps to set these parameters.


Step 1 Open ADU.

Step 2 Choose Display Settings from the Options drop-down menu. The Display Settings window appears (see Figure 7-1).

Figure 7-1 Display Settings Window

Step 3 Table 7-2 lists and describes the parameters that affect the operation of ADU status and statistics tools. Follow the instructions in the table to change any parameters.

Table 7-2 Parameters Affecting ADU Status and Statistics Tools 

Parameter
Description

Signal Strength Display Units

Specifies the units used to display signal strength on the Advanced Status window and signal-to-noise ratio (SNR) on the Available Infrastructure and Ad Hoc Networks window.

Options: % or dBm

Default: dBm

Units

Description

%

Displays the signal strength and signal-to-noise ratio as a percentage.

dBm

Displays the signal strength in decibels with respect to milliwatts (dBm) and the signal-to-noise ratio in decibels (dB).

Refresh Interval

Specifies how often the ADU status and statistics windows and the ASTU icon are updated.

Range: 1 to 5 seconds between updates (in 1-second increments)

Default: 3 seconds between updates

Data Display

Specifies whether the data that is displayed on the Diagnostics and Advanced Statistics windows continue to increment until the driver is reloaded or only until an update occurs (every 1 to 5 seconds).

Options: Relative or Cumulative

Default: Cumulative

Data Display
Description

Relative

Displays statistical data collected since the last update, as specified by the Refresh Interval (1 to 5 seconds).

Cumulative

Displays statistical data collected since the driver was loaded, upon card insertion or reboot.


Step 4 Click OK to save your changes.


Viewing the Current Status of Your Client Adapter

ADU enables you to view the current status of your client adapter as well as many of the settings that have been configured for the adapter. To view your client adapter's status and settings, open ADU. The Current Status window appears (see Figure 7-2).

Figure 7-2 Current Status Window

Table 7-3 interprets each element of the Current Status window.

Table 7-3 Basic Client Adapter Status 

Status
Description

Profile Name

The network configuration (or profile) your client adapter is currently using.

Note Refer to Chapter 4, for information on creating, modifying, and selecting profiles.

Link Status

The operational mode of your client adapter.

Value: Not Associated, Associated, Authenticating, Authenticated, Authentication Failed, Authentication Failed Retrying
Link Status
Description

Not Associated

The client adapter has not established a connection to an access point (in infrastructure mode) or another client (in ad hoc mode).

Associated

The client adapter has established a connection to an access point (in infrastructure mode) or another client (in ad hoc mode).

Authenticating

The client adapter is associated to an access point, and the EAP authentication process has begun but not yet succeeded.

Authenticated

The client adapter is associated to an access point, and the user is EAP authenticated.

Authentication Failed

The client adapter is associated to an access point, but the user has failed to EAP authenticate.

Authentication Failed Retrying

The client adapter is associated to an access point, the user has failed to EAP authenticate, but another authentication attempt is being made.

Wireless Mode

The frequency and rate at which your current wireless connection is capable of transmitting or receiving packets.

Value: 5 GHz 54 Mbps, 2.4 GHz 11 Mbps, or 2.4 GHz 54 Mbps

Note Refer to the Wireless Mode parameter in Table 5-3 for information on setting the wireless mode for your client adapter.

Network Type

The type of network in which your client adapter is being used.

Value: Infrastructure or Ad Hoc

Note Refer to the Network Type parameter in Table 5-3 for information on setting the network type.

Server Based Authentication

The method by which authentication to a back-end server is being performed to establish secure connectivity.

Value: None, LEAP, EAP-FAST, EAP-TLS, PEAP (EAP-GTC), PEAP (EAP-MSCHAP V2), or Host Based EAP

Note Refer to the "Overview of Security Features" section for details on these server-based authentication types.

IP Address

The IP address of your client adapter.

Current Channel

The channel that your client adapter is currently using for communications. This field displays Scanning while the client adapter searches for a channel.

Value: Dependent on radio band and regulatory domain

Note Refer to the Channel parameter in Table 5-3 for information on setting the channel for your client adapter.

Note Refer to Appendix D, for a list of channel identifiers, channel center frequencies, and regulatory domains for each channel.

Data Encryption

The data encryption type that was negotiated with the access point (in infrastructure mode) or another client (in ad hoc mode) upon association.

Value: None, WEP, CKIP, TKIP, or AES

Note Refer to the "Overview of Security Features" section for details on these data encryption types.

Signal Strength

The signal strength for all received packets. The color of this parameter's progress bar provides a visual interpretation of signal strength.

Value: Excellent (green), Good (green), Fair (yellow), Poor (red), or No Link

Click Advanced if you want to view more detailed status information for your client adapter. The Advanced Status window appears (see Figure 7-3).

Figure 7-3 Advanced Status Window

Table 7-4 interprets each element of the Advanced Status window.

Table 7-4 Advanced Client Adapter Status 

Status
Description

Network Name (SSID)

The name of the network to which your client adapter is currently associated.

Note Refer to the SSID1 parameter in Table 5-2 for information on setting the client adapter's SSID.

Server Based Authentication

The method by which authentication to a back-end server is being performed to establish secure connectivity.

Value: None, LEAP, EAP-FAST, EAP-TLS, PEAP (EAP-GTC), PEAP (EAP-MSCHAP V2), or Host Based EAP

Refer to the "Overview of Security Features" section for details on these server-based authentication types.

Data Encryption

The data encryption type that was negotiated with the access point (in infrastructure mode) or another client (in ad hoc mode) upon association.

Value: None, WEP, CKIP, TKIP, or AES

Note Refer to the "Overview of Security Features" section for details on these data encryption types.

Authentication Type

Specifies whether the client adapter must share the same WEP keys as the access point in order to authenticate or can authenticate to the access point regardless of its WEP settings.

Value: Open or Shared

Note An incorrect WEP key setting prevents connectivity to the network regardless of the 802.11 authentication type selected.

Note Refer to the "Setting Advanced Parameters" section for information on setting the 802.11 authentication mode.

Message Integrity Check

Indicates whether your client adapter is using message integrity check (MIC) to protect packets sent to and received from the access point.

MIC prevents bit-flip attacks on encrypted packets. During a bit-flip attack, an intruder intercepts an encrypted message, alters it slightly, and retransmits it, and the receiver accepts the retransmitted message as legitimate.

Note MIC is supported automatically by the client adapter's driver, but it must be enabled on the access point.

Value: None, MMH, or Michael
Message Integrity Check
Description

None

MIC is disabled.

MMH

MIC is enabled and is being used with CKIP.

Michael

MIC is enabled and is being used with WPA and TKIP.

QoS

The type of quality of service that is currently being used by your client adapter. QoS on wireless LANs (WLAN) provides prioritization of traffic from the access point over the WLAN based on traffic classification.

Value: None or WMM

QoS
Description

None

WMM standard QoS is not enabled.

WMM

Wi-Fi Multimedia, a component of the IEEE 802.11e WLAN standard for QoS, is enabled. For this value to appear, QoS and WMM must be enabled on the access point to which the client adapter is associated.

Note WMM is supported automatically in the client adapter software. However, you must enable the Windows QoS Packet Scheduler to ensure WMM support. Follow the instructions in the "Enabling Wi-Fi Multimedia" section to enable the QoS Packet Scheduler.

Associated AP Name

The name of the access point to which your client adapter is associated. It is shown only if the client adapter is in infrastructure mode, the access point was configured with a name, and Aironet Extensions are enabled (on access points running Cisco IOS Release 12.2(4)JA or later).

Note This field shows up to 15 characters although the name of the access point may be longer.

Associated AP IP Address

The IP address of the access point to which your client adapter is associated. It is shown only if the client adapter is in infrastructure mode, the access point was configured with an IP address, and Aironet Extensions are enabled (on access points running Cisco IOS Release 12.2(4)JA or later).

Note If Aironet Extensions are disabled, the IP address of the associated access point is shown as 0.0.0.0.

Associated AP MAC Address

The MAC address of the access point to which your client adapter is associated. It is shown only if the client adapter is in infrastructure mode.

Note This field displays the MAC address of the access point's Ethernet port (for access points that do not run Cisco IOS software) or the MAC address of the access point's radio (for access points that run Cisco IOS software). The MAC address of the Ethernet port on access points that run Cisco IOS software is printed on a label on the back of the device.

Power Save Mode

The client adapter's current power consumption setting.

Value: CAM (Constantly Awake Mode), Max PSP (Max Power Saving), or Fast PSP (Power Save Mode)

Note Refer to the Power Save Mode parameter in Table 5-3 for information on setting the client adapter's power save mode.

Current Power Level

The power level at which your client adapter is currently transmitting. The maximum level is dependent upon the radio band used and your country's regulatory agency.

Value: 10, 13, 20, 25, or 40 mW (802.11a band);
10, 20, 30, 50, 63, or 100 mW (802.11b/g band)

Note Refer to the Transmit Power Level parameter in Table 5-3 for information on setting the client adapter's power level.

Available Power Levels

The power levels at which your client adapter is capable of transmitting. The maximum level is dependent upon the radio band used and your country's regulatory agency.

Value: 10, 13, 20, 25, or 40 mW (802.11a band);
10, 20, 30, 50, 63, or 100 mW (802.11b/g band)

Note Refer to the Transmit Power Level parameter in Table 5-3 for information on the client adapter's available power levels.

Current Signal Strength

The signal strength for all received packets. The higher the value, the stronger the signal.

Range: 0 to 100% or 0 to -100 dBm

Current Signal Quality

The signal quality for all received packets. The higher the value, the clearer the signal.

Range: 0 to 100%

Note This field appears only if you selected signal strength to be displayed as a percentage. See the Signal Strength Display Units parameter in Table 7-2 for information.

Current Noise Level

The level of background radio frequency energy in the current radio band. The lower the value, the less background noise present.

Range: 0 to -100 dBm

Note This field appears only if you selected signal strength to be displayed in dBm. See the Signal Strength Display Units parameter in Table 7-2 for information.

Up Time

The amount of time (in hours:minutes:seconds) since the client adapter has been receiving power. If the adapter has been running for more than 24 hours, the time is displayed in days, hours:minutes:seconds.

802.11b Preamble

Indicates whether your client adapter is using only long radio headers or short and long radio headers.

Value: Short & Long or Long Only

Note This field contains a value only when the client adapter is operated in 2.4-GHz 11-Mbps or 2.4-GHz 54-Mbps mode.

Note Refer to the 802.11b Preamble parameter in Table 5-3 for information on using radio headers.

Current Receive Rate

The rate at which your client adapter is currently receiving data packets.

Value: 1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36, 48, or 54 Mbps

Current Transmit Rate

The rate at which your client adapter is currently transmitting data packets.

Value: 1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36, 48, or 54 Mbps

Channel

The channel that your client adapter is currently using for communications. This field displays Scanning while the client adapter searches for a channel.

Value: Dependent on radio band and regulatory domain

Note Refer to the Channel parameter in Table 5-3 for information on setting the channel for your client adapter.

Note Refer to Appendix D, for a list of channel identifiers, channel center frequencies, and regulatory domains for each channel.

Frequency

The radio frequency that your client adapter is currently using for communications. This field displays Scanning while the client adapter searches for a frequency.

Value: Dependent on radio band and regulatory domain

Note Refer to the Wireless Mode parameter in Table 5-3 for information on setting the frequency for your client adapter.

Channel Set

The regulatory domain for which your client adapter is currently configured. This value is not user selectable.

Value: America, EMEA, Japan, or Rest of World

Note Refer to Appendix D, for a list of channel identifiers, channel center frequencies, and regulatory domains for each channel.


Click OK to close the Advanced Status window.

Viewing Statistics for Your Client Adapter

ADU enables you to view statistics that indicate how data is being received and transmitted by your client adapter.

To view your client adapter's statistics, open ADU and click the Diagnostics tab. The Cisco Aironet Desktop Utility (Diagnostics) window appears (see Figure 7-4).

Figure 7-4 Cisco Aironet Desktop Utility (Diagnostics) Window

This window displays basic transmit and receive statistics for your client adapter. The statistics are calculated on a relative or cumulative basis as specified by the Data Display parameter and are continually updated at the rate specified by the Refresh Interval parameter. Instructions for changing the Data Display and Refresh Interval settings are provided in Table 7-2.


Note The receive and transmit statistics are host statistics. That is, they show packets and errors received or sent by the Windows device.


Table 7-5 describes each statistic that is displayed for your client adapter.

Table 7-5 Basic Client Adapter Statistics 

Statistic
Description
Transmit Statistics

Multicast Packets

The number of multicast packets that were transmitted.

Broadcast Packets

The number of broadcast packets that were transmitted.

Unicast Packets

The number of unicast packets that were transmitted successfully.

Total Bytes

The number of bytes of data that were transmitted successfully.

Receive Statistics

Multicast Packets

The number of multicast packets that were received.

Broadcast Packets

The number of broadcast packets that were received.

Unicast Packets

The number of unicast packets that were received successfully.

Total Bytes

The number of bytes of data that were received successfully.


Click Advanced Statistics if you want to view additional statistics for your client adapter. The Advanced Statistics window appears (see Figure 7-5).

Figure 7-5 Advanced Statistics Window

Table 7-6 interprets each element of the Advanced Statistics window.

Table 7-6 Advanced Client Adapter Statistics 

Status
Description
Transmit Statistics

Frames Transmitted OK

The number of frames that were transmitted successfully.

Frames Retried

The number of frames that were retried.

Frames Dropped

The number of frames that were dropped because of errors or collisions.

No ACK Frames

The number of transmitted frames that did not have their corresponding Ack frame received successfully.

ACK Frames

The number of transmitted frames that had their corresponding Ack frame received successfully.

RTS Frames

The number of request-to-send (RTS) transmissions that were attempted.

CTS Frames

The number of clear-to-send (CTS) frames that were received in response to a successfully transmitted RTS frame.

No CTS Frames

The number of request-to-send (RTS) transmissions that were unsuccessful. The access point sends CTS frames in response to the client's RTS frames. This field keeps track of each time the client does not receive a CTS back from the access point.

Retried RTS Frames

The number of request-to-send (RTS) frames that were retransmitted.

Retried Data Frames

The number of normal data frames that were retransmitted.

Receive Statistics

Beacons Received

The number of beacon frames that were received successfully.

Frames Received OK

The number of all frames that were received successfully.

Frames Received with Errors

The number of frames that were received with an invalid checksum.

CRC Errors

The number of cyclic redundancy check (CRC) errors detected in the data portion of the frame.

Encryption Errors

The number of frames that were received with encryption errors.

Duplicate Frames

The number of duplicate frames that were received.

AP Mismatches

The number of times the client adapter tried to associate to an access point but was unable to because the access point was not the adapter's specified access point.

Note Refer to the Access Point 1 through Access Point 4 parameters on page 5-13 for information on specifying access points.

Data Rate Mismatches

The number of times the client adapter tried to associate to an access point but was unable to because the adapter's data rate was not supported by the access point.

Note Refer to the Wireless Mode parameter in Table 5-3 for information on supported data rates.

Authentication Time-Out

The number of times the client adapter tried to authenticate to an access point but was unable to because the access point did not respond fast enough (timed out).

Authentication Rejects

The number of times the client adapter tried to authenticate to an access point but was rejected.

Association Time-Out

The number of times the client adapter tried to associate to an access point but was unable to because the access point did not respond fast enough (timed out).

Association Rejects

The number of times the client adapter tried to associate to an access point but was rejected.

Standard MIC OK

The number of frames that were received with the correct message integrity check (MIC) value.

Standard MIC Errors

The number of frames that were discarded due to an incorrect message integrity check (MIC) value.

CKIP MIC OK

The number of frames that were received with the correct message integrity check (MIC) value when CKIP was being used.

Note This field is displayed only if MIC is enabled on the access point.

CKIP MIC Errors

The number of frames that were discarded due to an incorrect message integrity check (MIC) value when CKIP was being used.

Note This field is displayed only if MIC is enabled on the access point.


Click OK to close the Advanced Statistics window.