CleanAir
Cisco CleanAir is a spectrum intelligence solution designed to proactively manage the challenges of a shared wireless spectrum. It allows you to see all of the users of the shared spectrum (both native devices and foreign interferers). It also enables you or your network to act upon this information. For example, you could manually remove the interfering device, or the system could automatically change the channel away from the interference. CleanAir provides spectrum management and RF visibility.
A Cisco CleanAir system consists of CleanAir-enabled access points, Cisco Wireless LAN Controllers, and Cisco Prime Infrastructure. These access points collect information about all devices that operate in the industrial, scientific, and medical (ISM) bands, identify and evaluate the information as a potential interference source, and forward it to the Cisco WLC. The Cisco WLC controls the access points, collects spectrum data, and forwards information to Cisco Prime Infrastructure or a Cisco mobility services engine (MSE) upon request.
For every device operating in the unlicensed band, Cisco CleanAir tells you what it is, where it is, how it is impacting your wireless network, and what actions you or your network should take. It simplifies RF so that you do not have to be an RF expert.
Wireless LAN systems operate in unlicensed 2.4- and 5-GHz ISM bands. Many devices, such as microwave ovens, cordless phones, and Bluetooth devices also operate in these bands and can negatively affect Wi-Fi operations.
Some of the most advanced WLAN services, such as voice over wireless and IEEE 802.11n radio communications, could be significantly impaired by the interference caused by other legal users of the ISM bands. The integration of Cisco CleanAir functionality into the Cisco Unified Wireless Network addresses this problem of radio frequency (RF) interference.
CleanAir is supported on mesh AP backhaul at a 5-GHz radio of mesh. You can enable CleanAir on backhaul radios and can provide report interference details and air quality.
This section contains the following subsections:
Role of the Cisco Wireless LAN Controller in a Cisco CleanAir System
The Cisco WLC performs the following tasks in a Cisco CleanAir system:
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Configures Cisco CleanAir capabilities on the access point.
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Provides interfaces (GUI, CLI, and SNMP) for configuring Cisco CleanAir features and retrieving data
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Displays spectrum data.
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Collects and processes air quality reports from the access point and stores them in the air quality database. The Air Quality Report (AQR) contains information about the total interference from all identified sources represented by the Air Quality Index (AQI) and summary for the most severe interference categories. The CleanAir system can also include unclassified interference information under per interference type reports, which enables you to take action in cases where the interference due to unclassified interfering devices is more.
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Collects and processes interference device reports (IDRs) from the access point and stores them in the interference device database.
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Forwards spectrum data to Prime Infrastructure and the MSE.
Interference Types that Cisco CleanAir Can Detect
Cisco CleanAir can detect interference, report on the location and severity of the interference, and recommend different mitigation strategies. Two such mitigation strategies are persistent device avoidance and spectrum event-driven RRM.
Wi-Fi chip-based RF management systems share these characteristics:
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Any RF energy that cannot be identified as a Wi-Fi signal is reported as noise.
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Noise measurements that are used to assign a channel plan tend to be averaged over a period of time to avoid instability or rapid changes that can be disruptive to certain client devices.
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Averaging measurements reduces the resolution of the measurement. As such, a signal that disrupts clients might not look like it needs to be mitigated after averaging.
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All RF management systems available today are reactive in nature.
Cisco CleanAir is different and can positively identify not only the source of the noise but also its location and potential impact to a WLAN. Having this information allows you to consider the noise within the context of the network and make intelligent and, where possible, proactive decisions. For CleanAir, two types of interference events are common:
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Persistent interference
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Spontaneous interference
Persistent interference events are created by devices that are stationary in nature and have intermittent but largely repeatable patterns of interference. For example, consider the case of a microwave oven located in a break room. Such a device might be active for only 1 or 2 minutes at a time. When operating, however, it can be disruptive to the performance of the wireless network and associated clients. Using Cisco CleanAir, you can positively identify the device as a microwave oven rather than indiscriminate noise. You can also determine exactly which part of the band is affected by the device, and because you can locate it, you can understand which access points are most severely affected. You can then use this information to direct RRM in selecting a channel plan that avoids this source of interference for the access points within its range. Because this interference is not active for a large portion of the day, existing RF management applications might attempt to again change the channels of the affected access points. Persistent device avoidance is unique, however, in that it remains in effect as long as the source of interference is periodically detected to refresh the persistent status. The Cisco CleanAir system knows that the microwave oven exists and includes it in all future planning. If you move either the microwave oven or the surrounding access points, the algorithm updates RRM automatically.
Note |
Spectrum event-driven RRM can be triggered only by Cisco CleanAir-enabled access points in local mode. |
Spontaneous interference is interference that appears suddenly on a network, perhaps jamming a channel or a range of channels completely. The Cisco CleanAir spectrum event-driven RRM feature allows you to set a threshold for air quality (AQ) that, if exceeded, triggers an immediate channel change for the affected access point. Most RF management systems can avoid interference, but this information takes time to propagate through the system. Cisco CleanAir relies on AQ measurements to continuously evaluate the spectrum and can trigger a move within 30 seconds. For example, if an access point detects interference from a video camera, it can recover by changing channels within 30 seconds of the camera becoming active. Cisco CleanAir also identifies and locates the source of interference so that more permanent mitigation of the device can be performed at a later time.
In the case of Bluetooth devices, Cisco CleanAir-enabled access points can detect and report interferences only if the devices are actively transmitting. Bluetooth devices have extensive power save modes. For example, interference can be detected when data or voice is being streamed between the connected devices.
Persistent Devices
Some interference devices such as outdoor bridges and Microwave Ovens only transmit when needed. These devices can cause significant interference to the local WLAN due to short duration and periodic operation remain largely undetected by normal RF management metrics. With CleanAir the RRM DCA algorithm can detect, measure, register and remember the impact and adjust the DCA algorithm. This minimizes the use of channels affected by the persistent devices in the channel plan local to the interference source. Cisco CleanAir detects and stores the persistent device information in the Cisco WLC and this information is used to mitigate interfering channels.
Persistent Devices Detection
CleanAir-capable Monitor Mode access point collects information about persistent devices on all configured channels and stores the information in the Cisco WLC. Local/Bridge mode AP detects interference devices on the serving channels only.
Persistent Devices Propagation
Persistent device information that is detected by local or monitor mode access points is propagated to the neighboring access points connected to the same Cisco WLC to provide better chance of handling and avoiding persistent devices. Persistent device detected by the CleanAir-enabled access point is propagated to neighboring non-CleanAir access points, thus enhancing channel selection quality.
Detecting Interferers by an Access Point
When a CleanAir-enabled access point detects interference devices, detections of the same device from multiple sensors are merged together to create clusters. Each cluster is given a unique ID. Some devices conserve power by limiting the transmit time until actually needed which results in the spectrum sensor to temporarily stop detecting the device. This device is then correctly marked as down. A down device is correctly removed from the spectrum database. In cases when all the interferer detections for a specific devices are reported, the cluster ID is kept alive for an extended period of time to prevent possible device detection bouncing. If the same device is detected again, it is merged with the original cluster ID and the device detection history is preserved.
For example, some bluetooth headsets operate on battery power. These devices employ methods to reduce power consumption, such as turning off the transmitter when not actually needed. Such devices can appear to come and go from the classification. To manage these devices, CleanAir keeps the cluster IDs longer and they are remerged into a single record upon detection. This process smoothens the user records and accurately represents the device history.
Prerequisites for CleanAir
You can configure Cisco CleanAir only on CleanAir-enabled access points.
Only Cisco CleanAir-enabled access points using the following access point modes can perform Cisco CleanAir spectrum monitoring:
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Local—In this mode, each Cisco CleanAir-enabled access point radio provides air quality and interference detection reports for the current operating channel only. An AP can only measure air quality and interference when the AP is not busy transmitting wi-fi frames. This implies that CleanAir detections will be drastically lower if the AP is having a high channel utiliaztion.
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FlexConnect—When a FlexConnect access point is connected to the controller , its Cisco CleanAir functionality is identical to local mode.
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Monitor—When Cisco CleanAir is enabled in monitor mode, the access point provides air quality and interference detection reports for all monitored channels.
The following options are available:
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All—All channels
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DCA—Channel selection governed by the DCA list
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Country—All channels are legal within a regulatory domain
Note
Suppose you have two APs, one in the FlexConnect mode and the other in the monitor mode. Also suppose that you have created a profile enabling EAP attack against 802.1x auth. The Airmagnet (AM) tool, which can generate different types of attacks, fails to generate any attack even if you have provided valid AP MAC and STA MAC addresses. But if the AP MAC and STA MAC addresses in the AM tool are swapped, that is, the AP MAC address is specified in the STA MAC field and the STA MAC address is specified in the AP MAC field, then the tool is able to generate attacks, which the AP in the Monitor mode is also able to detect.
Note
The access point does not participate in AQ HeatMap in Prime Infrastructure.
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SE-Connect—This mode enables a user to connect a Spectrum Expert application running on an external Microsoft Windows XP or Vista PC to a Cisco CleanAir-enabled access point in order to display and analyze detailed spectrum data. The Spectrum Expert application connects directly to the access point, bypassing the controller. An access point in SE-Connect mode does not provide any Wi-Fi, RF, or spectrum data to the controller. All CleanAir system functionality is suspended while the AP is in this mode, and no clients are served. This mode is intended for remote troubleshooting only. Up to three active Spectrum Expert connections are possible.
Restrictions for CleanAir
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Access points in monitor mode do not transmit Wi-Fi traffic or 802.11 packets. They are excluded from radio resource management (RRM) planning and are not included in the neighbor access point list. IDR clustering depends on the controller’s ability to detect neighboring in-network access points. Correlating interference device detections from multiple access points is limited between monitor-mode access points.
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Spectrum Expert (SE) Connect functionality is supported for local, FlexConnect, bridge, and monitor modes. The access point provides spectrum information to Spectrum Expert only for the current channel(s). For local, FlexConnect, and bridge modes, the spectrum data is available for the current active channel(s) and for the monitor mode, the common monitored channel list is available. The access point continues to send AQ (Air Quality) and IDR (Interference Device Reports) reports to the controller and perform normal activities according to the current mode. Sniffer and rogue detections access point modes are incompatible with all types of CleanAir spectrum monitoring.
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Monitor Mode access point in slot 2 operates at 2.4 GHz only. For 4800 AP slot 1 5ghz is dedicated and cannot be individually moved to monitor mode. However, slot 0 is XOR and can be moved to monitor as well as 2.4/5ghz. Slot 2 is dedicated monitor and will operate in 5ghz and in AP monitor mode, slot 2 will be disabled because a monitor radio is alreay available in both 2.4/5ghz. 3700 AP has dedicated 2.4ghz (slot0) and 5ghz (slot1).
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We recommend a ratio of 1 monitor-mode access point for every 5 local-mode access points; this can vary based on the network design and expert guidance for best coverage.
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Spectrum Expert (Windows XP laptop client) and AP should be pingable, otherwise; it will not work.
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CleanAir is not supported wherein the channel width is 160 MHz.
Configuring Cisco CleanAir on the Controller
Configuring Cisco CleanAir on Cisco WLC (GUI)
Procedure
Step 1 |
Choose Wireless > 802.11a/n/ac or 802.11b/g/n > CleanAir to open the 802.11a (or 802.11b) > CleanAir page. |
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Step 2 |
Check the CleanAir check box to enable Cisco CleanAir functionality on the 802.11a/n or 802.11b/g/n network, or uncheck it to prevent the Cisco WLC from detecting spectrum interference. By default, this feature is in enabled state. |
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Step 3 |
Check the Report Interferers check box to enable the Cisco CleanAir system to report any detected sources of interference, or uncheck it to prevent the Cisco WLC from reporting interferers. By default, this feature is in enabled state.
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Step 4 |
Check the Persistent Device Propagation check box to enable propagation of information about persistent devices that can be detected by CleanAir. Persistent device propagation enables you to propagate information about persistent devices to the neighboring APs connected to the same Cisco WLC. Persistent interferers are present at the location and interfere with the WLAN operations even if they are not detectable at all times. |
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Step 5 |
Ensure that any sources of interference that need to be detected and reported by the Cisco CleanAir system appear in the Interferences to Detect box and any that do not need to be detected appear in the Interferences to Ignore box. By default, all interference sources are detected, except BLE Beacon. The possible sources of interference that you can choose are as follows:
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Step 6 |
Configure Cisco CleanAir alarms as follows: |
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Step 7 |
Click Apply. |
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Step 8 |
Trigger spectrum event-driven radio resource management (RRM) to run when a Cisco CleanAir-enabled AP detects a significant level of interference as follows: |
Configuring Cisco CleanAir on Cisco WLC (CLI)
Procedure
Step 1 |
Configure Cisco CleanAir functionality on the 802.11 network by entering this command: config {802.11a | 802.11b} cleanair {enable | disable} all If you disable this feature, the Cisco WLC does not receive any spectrum data. By default, this feature is in enabled state. |
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Step 2 |
Enable CleanAir on all associated access points in a network: config {802.11a | 802.11b} cleanair enable network You can enable CleanAir on a 5-GHz radio of mesh access points. |
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Step 3 |
Configure interference detection and specify sources of interference that need to be detected by the Cisco CleanAir system by entering this command: config {802.11a | 802.11b} cleanair device {enable | disable} type where you choose the type as one of the following:
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Step 4 |
Configure the triggering of air quality alarms by entering this command: config {802.11a | 802.11b} cleanair alarm air-quality {enable | disable} The default value is enabled. |
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Step 5 |
Specify the threshold at which you want the air quality alarm to be triggered by entering this command: config {802.11a | 802.11b} cleanair alarm air-quality threshold threshold where threshold is a value between 1 and 100 (inclusive). When the air quality falls below the threshold level, the alarm is triggered. A value of 1 represents the worst air quality, and 100 represents the best. The default value is 35. |
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Step 6 |
Enable the triggering of interferer alarms by entering this command: The default value is enable. |
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Step 7 |
Specify sources of interference that trigger alarms by entering this command:
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Step 8 |
Configure the triggering of air quality alarms for unclassified devices by entering this command: config {802.11a | 802.11b} cleanair alarm unclassified {enable | disable} |
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Step 9 |
Specify the threshold at which you want the air quality alarm to be triggered for unclassified devices by entering this command: config {802.11a | 802.11b} cleanair alarm unclassified threshold threshold where threshold is a value from 1 and 99 (inclusive). When the air quality falls below the threshold level, the alarm is triggered. A value of 1 represents the worst air quality, and 100 represents the best. The default value is 35. |
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Step 10 |
Trigger spectrum event-driven radio resource management (RRM) to run when a Cisco CleanAir-enabled access point detects a significant level of interference by entering these commands: config advanced {802.11a | 802.11b} channel cleanair-event {enable | disable} —Enables or disables spectrum event-driven RRM. The default value is disabled. config advanced {802.11a | 802.11b} channel cleanair-event sensitivity {low | medium | high | custom} —Specifies the threshold at which you want RRM to be triggered. When the interference level for the access point rises above the threshold level, RRM initiates a local dynamic channel assignment (DCA) run and changes the channel of the affected access point radio if possible to improve network performance. Low represents a decreased sensitivity to changes in the environment while high represents an increased sensitivity. You can also set the sensitivity to a custom level of your choice. The default value is medium. config advanced {802.11a | 802.11b} channel cleanair-event sensitivity threshold thresholdvalue —If you set the threshold sensitivity as custom, you must set a custom threshold value. The default is 35. |
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Step 11 |
Configure and monitor Interference Awareness by entering the following commands:
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Step 12 |
Enable persistent devices propagation by entering this command: config advanced {802.11a | 802.11b} channel pda-prop {enable | disable} |
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Step 13 |
Save your changes by entering this command: save config |
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Step 14 |
See the Cisco CleanAir configuration for the 802.11a/n or 802.11b/g/n network by entering this command: show {802.11a | 802.11b} cleanair config Information similar to the following appears:
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Step 15 |
See the spectrum event-driven RRM configuration for the 802.11a/n/ac or 802.11b/g/n network by entering this command: show advanced {802.11a | 802.11b} channel Information similar to the following appears:
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Configuring Cisco CleanAir on an Access Point
Configuring Cisco CleanAir on an Access Point (GUI)
Procedure
Step 1 |
Choose Wireless > Access Points > Radios > 802.11a/n/ac or 802.11b/g/n to open the 802.11a/n/ac (or 802.11b/g/n) Radios page. |
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Step 2 |
Hover your cursor over the blue drop-down arrow for the desired access point and click Configure. The 802.11a/n/ac (or 802.11b/g/n) Cisco APs > Configure page appears. The CleanAir Capable field shows whether this access point can support CleanAir functionality. If it can, go to the next step to enable or disable CleanAir for this access point. If the access point cannot support CleanAir functionality, you cannot enable CleanAir for this access point.
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Step 3 |
Enable Cisco CleanAir functionality for this access point by choosing Enable from the CleanAir Status drop-down list. To disable CleanAir functionality for this access point, choose Disable. The default value is Enable. This setting overrides the global CleanAir configuration for this access point. The Number of Spectrum Expert Connections text box shows the number of Spectrum Expert applications that are currently connected to the access point radio. Up to three active connections are possible. |
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Step 4 |
Click Apply. |
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Step 5 |
Click Save Configuration. |
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Step 6 |
Click Back to return to the 802.11a/n/ac (or 802.11b/g/n) Radios page. |
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Step 7 |
View the Cisco CleanAir status for each access point radio by looking at the CleanAir Status text box on the 802.11a/n/ac (or 802.11b/g/n) Radios page. The Cisco CleanAir status is one of the following:
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Configuring Cisco CleanAir on an Access Point (CLI)
Procedure
Step 1 |
Configure Cisco CleanAir functionality for a specific access point by entering this command: config {802.11a | 802.11b} cleanair {enable | disable}Cisco_AP |
Step 2 |
Save your changes by entering this command: save config |
Step 3 |
See the Cisco CleanAir configuration for a specific access point on the 802.11a/n/ac/ac or 802.11b/g/n/ac network by entering this command: show ap config {802.11a | 802.11b} Cisco_AP Information similar to the following appears:
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Configuring Spectrum Intelligence
Information About Spectrum Intelligence
This feature scans for non-Wi-Fi radio interference on 2.4 and 5 GHz bands. The feature supports client serving mode and monitor mode.
Restrictions on Spectrum Intelligence
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Only the following Cisco APs support Spectrum Intelligence:
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Cisco Aironet 1800 APs
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Cisco Aironet 1810 APs
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Cisco Aironet 1815 APs
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Cisco Aironet 1832 APs
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Cisco Aironet 1852 APs
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Cisco Aironet 1542 APs
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No mitigation of interferer.
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Limited to detect three types of devices.
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Microwave
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Continuous wave—video recorder, baby monitor
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SI-FHSS—BlueTooth, Frequency hopping DECT phones
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Cannot differentiate between devices of the same type.
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Does not report to the CleanAir Infrastructure - it is only reported in the WLC.
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When the AP is in Local Mode, it reports the first interference detected.
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When in Monitor Mode, it reports all three types of interference if present.
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Does not provide location as only RSSI is measured at the reporting APs.
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Does not alert through Cisco Prime Infrastructure.
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Does not send information to CMX or MSE (as CleanAir does).
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It cannot provide location of interfering device.
Configuring Spectrum Intelligence – Global (GUI)
Procedure
Step 1 |
Choose to open the CleanAir page. |
Step 2 |
Check Spectrum Intelligence to enable the Spectrum Intelligence feature. This enables Spectrum Intelligence feature on all the APs which support Spectrum Intelligence. |
Step 3 |
Click Apply. |
Step 4 |
To view the APs supporting Spectrum Intelligence, choose 802.11a/b Radio page. to open theThe names of the APs that are spectrum intelligence capable have $ as a suffix. |
Configuring Spectrum Intelligence per AP (GUI)
Procedure
Step 1 |
Choose to open the 802.11a/b radio page. |
Step 2 |
The names of the APs that are spectrum intelligence capable have $ as a suffix. Hover your cursor over the blue drop-down arrow in front of the AP name with the $ sign. Click Configure. The Cisco APs > Configure page is displayed. |
Step 3 |
Under the Spectrum Intelligence section, from the Spectrum Intelligence Admin Status drop-down list, choose Enable or Disable option. |
Step 4 |
Click Apply. |
Configuring Spectrum Intelligence (CLI)
Procedure
Monitoring Interference Devices
Prerequisites for Monitoring the Interference Devices
You can configure Cisco CleanAir only on CleanAir-enabled access points.
Monitoring the Interference Device (GUI)
Procedure
Step 1 |
Choose to open the CleanAir > Interference Devices page.This page shows the following information:
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Step 2 |
Click Change Filter to display the information about interference devices based on a particular criteria. |
Step 3 |
Click Clear Filter to remove the filter and display the entire access point list. You can create a filter to display the list of interference devices that are based on the following filtering parameters:
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Step 4 |
Click Find. The current filter parameters are displayed in the Current Filter field. |
Monitoring the Interference Device (CLI)
Detecting Interferers by an Access Point
Procedure
See information for all of the interferers detected by a specific access point on the 802.11a/n/ac or 802.11b/g/n radio band by entering this command: show {802.11a | 802.11b} cleanair device ap Cisco_AP When a CleanAir-enabled access point detects interference devices, detections of the same device from multiple sensors are merged together to create clusters. Each cluster is given a unique ID. Some devices conserve power by limiting the transmit time until actually needed which results in the spectrum sensor to temporarily stop detecting the device. This device is then correctly marked as down. A down device is correctly removed from the spectrum database. In cases when all the interferer detections for a specific devices are reported, the cluster ID is kept alive for an extended period of time to prevent possible device detection bouncing. If the same device is detected again, it is merged with the original cluster ID and the device detection history is preserved. For example, some Bluetooth headsets operate on battery power. These devices employ methods to reduce power consumption, such as turning off the transmitter when not actually needed. Such devices can appear to come and go from the classification. To manage these devices, CleanAir keeps the cluster IDs longer and they are remerged into a single record upon detection. This process smoothens the user records and accurately represents the device history. |
Detecting Interferers by Device Type
Procedure
See information for all of the interferers of a specific device type on the 802.11a/n/ac or 802.11b/g/n radio band by entering this command: show {802.11a | 802.11b} cleanair device type type where you choose type as one of the following:
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Detecting Persistent Sources of Interference
Procedure
See a list of persistent sources of interference for a specific access point on the 802.11a/n/ac or 802.11b/g/n radio band by entering this command: show ap auto-rf {802.11a | 802.11b} Cisco_AP |
Monitoring Persistent Devices (GUI)
Procedure
Choose Wireless > Access Points > Radios > 802.11a/n/ac or 802.11b/g/n to open the 802.11a/n/ac (or 802.11b/g/n) Radios page. Hover your cursor over the blue drop-down arrow for the desired access point and click Detail. The 802.11a/n/ac (or 802.11b/g/n) AP Interfaces > Detail page is displayed. This page displays the details of the access points along with the list of persistent devices detected by this access point. Details of the persistent devices is displayed under the Persistent Devices section. The following information for each persistent device is available:
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Monitoring Persistent Devices (CLI)
Procedure
To view the list of persistent devices using the CLI, use the following command: show ap auto-rf {802.11a | 802.11b} ap_name Information similar to the following appears:
The following information for each persistent device is available:
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Monitoring the Air Quality of Radio Bands
This section describes how to monitor the air quality of the 802.11a/n/ac and 802.11b/g/n radio bands using both the Cisco WLC GUI and CLI.
Monitoring the Air Quality of Radio Bands (GUI)
Procedure
Choose Monitor > Cisco CleanAir > 802.11a/n/ac or 802.11b/g/n >Air Quality Report to open the CleanAir > Air Quality Report page. This page shows the air quality of both the 802.11a/n/ac and 802.11b/g/n radio bands. Specifically, it shows the following information:
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Monitoring the Air Quality of Radio Bands (CLI)
Viewing a Summary of the Air Quality
Procedure
See a summary of the air quality for the 802.11a/n/ac or 802.11b/g/n radio band by entering this command: show {802.11a | 802.11b} cleanair air-quality summary |
Viewing Air Quality for all Access Points on a Radio Band
Procedure
See information for the 802.11a/n/ac or 802.11b/g/n access point with the air quality by entering this command: show {802.11a | 802.11b} cleanair air-quality |
Viewing Air Quality for an Access Point on a Radio Band (CLI)
Procedure
See air quality information for a specific access point on the 802.11a/n/ac or 802.11b/g/n radio band by entering this command: show {802.11a | 802.11b} cleanair air-quality Cisco_AP |
Monitoring the Worst Air Quality of Radio Bands (GUI)
Procedure
Step 1 |
Choose Monitor > Cisco CleanAir >Worst Air-Quality to open the CleanAir > Worst Air Quality Report page. This page shows the air quality of both the 802.11a/n/ac and 802.11b/g/n radio bands. Specifically, it shows the following information:
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Step 2 |
See a list of persistent sources of interference for a specific access point radio as follows:
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Monitoring the Worst Air Quality of Radio Bands (CLI)
This section describes the commands that you can use to monitor the air quality of the 802.11 radio band.
Viewing a Summary of the Air Quality (CLI)
See a summary of the air quality for the 802.11a/n/ac or 802.11b/g/n radio band by entering this command:
show {802.11a | 802.11b} cleanair air-quality summary
Viewing the Worst Air Quality Information for all Access Points on a Radio Band (CLI)
See information for the 802.11a/n/ac or 802.11b/g/n access point with the worst air quality by entering this command:
show {802.11a | 802.11b} cleanair air-quality worst
Viewing the Air Quality for an Access Point on a Radio Band (CLI)
See the air quality information for a specific access point on the 802.11 radio band by entering this command:
show {802.11a | 802.11b} cleanair air-quality Cisco_AP
Viewing the Air Quality for an Access Point by Device Type (CLI)
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See information for all of the interferers detected by a specific access point on the 802.11a/n/ac or 802.11b/g/n radio band by entering this command:
show {802.11a | 802.11b} cleanair device ap Cisco_AP
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See information for all of the interferers of a specific device type on the 802.11a/n or 802.11b/g/n radio band by entering this command:
show {802.11a | 802.11b} cleanair device type type
where you choose type as one of the following:
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802.11a
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802.11-inv—A device using spectrally inverted Wi-Fi signals
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802.11-nonstd—A device using nonstandard Wi-Fi channels
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canopy—A canopy bridge device
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cont-tx—A continuous transmitter
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dect-like—A digital enhanced cordless communication (DECT)-compatible phone
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jammer—A jamming device
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superag—An 802.11 SuperAG device
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tdd-tx—A time division duplex (TDD) transmitter
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video—A video device
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wimax-fixed—A WiMAX fixed device
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wimax-mobile—A WiMAX mobile device
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802.11b
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bt-link—A bluetooth link device
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bt-discovery—A bluetooth discovery device
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ble-beacon—A BLE beacon device
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mw-oven—A microwave oven device
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802.11-fh—An 802.11 frequency-hopping device
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802.15.4—An 802.15.4 device
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tdd-tx—A time division duplex (TDD) transmitter
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jammer—A jamming device
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cont-tx—A continuous transmitter
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dect-like—A digital enhanced cordless communication (DECT)-compatible phone
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video—A video device
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802.11-inv—A device using spectrally inverted Wi-Fi signals
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802.11-nonstd—A device using nonstandard Wi-Fi channels
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superag—An 802.11 SuperAG device
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canopy—A canopy bridge device
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wimax-mobile—A WiMAX mobile device
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wimax-fixed—A WiMAX fixed device
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msft-xbox—A Microsoft Xbox device
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Detecting Persistent Sources of Interference (CLI)
See a list of persistent sources of interference for a specific access point on the 802.11a/n/ac or 802.11b/g/n radio band by entering this command:
show ap auto-rf {802.11a | 802.11b} Cisco_AP