02-WLAN Configuration Guides

HomeSupportConfigure & DeployConfiguration GuidesH3C Unified Wired and Wireless Access Controller User Manual (R5417P03)-6W10302-WLAN Configuration Guides
17-WLAN RRM configuration
Title Size Download
17-WLAN RRM configuration 269.71 KB

Configuring WLAN RRM

About WLAN RRM

WLAN Radio Resource Management (RRM) provides an intelligent and scalable radio management solution to allow a WLAN to adapt to environment changes and maintain the optimal radio resource condition.

Operating mechanism

RRM enables the AC to monitor and analyze its associated radios, and optimize radio resources with features such as dynamic frequency selection (DFS), transmit power control (TPC), and spectrum analysis.

Dynamic frequency selection

Two adjacent radios on the same channel might cause signal collision, and other radio sources such as radar signals and microwave ovens might interfere with the operation of radios. With DFS, the AC selects an optimal channel for each radio in real time to avoid co-channel interference and interference from other radio sources.

The following factors will trigger DFS:

·          Error code rate—Physical layer error code rate and CRC error rate. CRC error rate shows the proportion of packets with CRC errors among all 802.11 packets.

·          Interference rateProportion of interference packets among all data packets. Interference packets are packets destined for other radios.

·          Channel usage—Proportion of used channel resources through packets transmitting and receiving.

·          Retransmission count—Data retransmissions caused by failure to receive ACK messages.

·          Radar signal—Radar signals detected on the current channel. In this case, the AC selects a new channel and immediately notifies the radio to change its working channel.

The AC uses the following procedure to perform DFS for a radio:

1.        Detects the current channel and selects an optimal channel when the CRC error threshold, the interference threshold, channel usage threshold, or the system-defined retransmission threshold is reached on the current channel.

2.        Compares the quality between the current channel and the optimal channel. The radio does not use the optimal channel until the quality gap between the two channels exceeds the tolerance level.

Figure 1 shows a DFS example. When the quality of the channels for BSS 1, BSS 3, and BSS 5 reaches a DFS threshold, the AC selects an optimal channel for each of them. This ensures wireless service quality.

Figure 1 Dynamic frequency selection

Transmit power control

TPC enables the AC to dynamically control access point transmit power based on real-time WLAN conditions. It can achieve desired RF coverage while avoiding channel interference between radios.

The AC maintains a neighbor report for each radio on its associated APs to record information about other radios detected by this radio. The AC can manage only radios associated with it.

The AC uses the following procedure to perform TPC for a radio:

1.        Determines whether the number of manageable radios (all-channel radios or overlapping-channel radios) that can detect this radio has reached the adjacency factor.

If the number has not reached the adjacency factor, the radio uses the maximum transmit power.

If the number has reached the adjacency factor, the AC goes to step 2:

2.        Ranks the radio's RSSIs detected by these manageable radios in descending order.

3.        Compares the RSSI specified by the adjacency factor with the power adjustment threshold and takes one of the following actions:

¡  Decreases the radio's transmit power when the RSSI rises above the threshold.

¡  Increases the radio's transmit power when the RSSI drops below the threshold.

Radios that can participate in TPC calculation for a radio include the following types:

·          All-channel radios—Include all manageable radios that detect the radio. TPC based on all-channel radios can better control the signal coverage.

·          Overlapping-channel radios—Include manageable radios that detect the radio on a channel overlapping with the radio's transmit channel. TPC based on overlapping-channel radios can expand signal coverage without increasing interference.

As shown in Figure 2, each AP has only one radio enabled. Before AP 4 joins, the number of manageable radios detected by each radio does not reach the adjacency factor 3. The radios use the maximum transmit power. After AP 4 joins, the number of manageable radios detected by each radio reaches the adjacency factor 3. The AC uses TPC to adjust the transmit powers for all radios.

Figure 2 Transmit power control

Restrictions and guidelines: WLAN RRM configuration

You can configure APs by using the following methods:

·          Configure APs one by one in AP view.

·          Assign APs to an AP group and configure the AP group in AP group view.

·          Configure all APs in global configuration view.

For an AP, the settings made in these views for the same parameter take effect in descending order of AP view, AP group view, and global configuration view.

WLAN RRM tasks at a glance

To configure RRM, perform the following tasks:

·          Configuring DFS

·          Configuring TPC

·          Configuring a radio baseline

·          Enabling radio scanning

·          Setting the RRM calibration mode for AC hierarchy

·          Enabling SNMP notifications for WLAN RRM

·          Setting the trap thresholds for adjacent-channel and co-channel interference

Configuring DFS

About DFS

The AC supports the following DFS methods:

·          Periodic auto-DFS—The AC automatically performs DFS for a radio at the channel calibration interval.

·          Scheduled auto-DFS—The AC performs DFS at the specified time in a time range. Use this method when interference is severe to avoid affecting ongoing wireless services.

·          On-demand DFS—The AC waits for a channel calibration interval and then performs DFS for all radios. You must perform this task every time you want the AC to perform DFS for radios.

Tasks at a glance

To configure DFS, perform the following tasks:

1.        Choose the following tasks as needed:

¡  Configuring periodic auto-DFS

¡  Configuring scheduled auto-DFS

¡  Configuring on-demand DFS

You cannot configure periodic auto-DFS and scheduled auto-DFS at the same time.

2.        (Optional.) Setting the DFS sensitivity mode

3.        (Optional.) Configuring DFS trigger parameters

You can configure DFS trigger parameters only when the DFS sensitivity mode is custom.

4.        (Optional.) Configuring an RRM holddown group

Configuration prerequisites

For DFS to work, configure the AC to automatically select a channel for a radio and not lock the channel by using the channel auto unlock command. For more information about the channel { channel-number | auto { lock | unlock } } command, see WLAN Command Reference.

Configuring periodic auto-DFS

Restrictions and guidelines

For wireless service stability, you can configure DFS suppression to suppress periodic auto-DFS when the online client quantity reaches the specified threshold.

Procedure

1.        Enter system view.

system-view

2.        (Optional.) Set the channel calibration interval.

wlan rrm calibration-channel interval minutes

By default, the channel calibration interval is 8 minutes.

3.        Enter AP view or an AP group's AP model view.

¡  Enter AP view.

wlan ap ap-name

¡  Execute the following commands in sequence to enter an AP group's AP model view:

wlan ap-group group-name

ap-model ap-model

4.        Enter radio view.

radio radio-id

5.        Enter RRM view.

rrm

6.        Enable auto-DFS.

calibrate-channel self-decisive enable

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, auto-DFS is disabled.

7.        Set the auto-DFS mode to periodic.

calibrate-channel mode periodic

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, the auto-DFS mode is periodic.

8.        (Optional.) Configure DFS suppression.

calibrate-channel suppression { disable | enable [ client-number number ] }

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, DFS suppression is disabled.

Configuring scheduled auto-DFS

About configuring scheduled auto-DFS

Scheduled auto-DFS enables the AC to collect statistics to generate channel reports and neighbor reports within the specified time range and perform DFS based on the reports.

Creating a time range

1.        Enter system view.

system-view

2.        Create a time range.

time-range time-range-name { start-time to end-time days [ from time1 date1 ] [ to time2 date2 ] | from time1 date1 [ to time2 date2 ] | to time2 date2 }

3.        Enter AP view or an AP group's AP model view.

¡  Enter AP view.

wlan ap ap-name

¡  Execute the following commands in sequence to enter an AP group's AP model view:

wlan ap-group group-name

ap-model ap-model

4.        Enter radio view.

radio radio-id

5.        Enter RRM view.

rrm

6.        Specify a time range for channel monitoring.

calibrate-channel monitoring time-range time-range-name

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, no time range is specified for channel monitoring.

Configuring a job and schedule

1.        Enter system view.

system-view

2.        Create a job and enter its view.

scheduler job job-name

3.        Execute the following commands in sequence to assign commands to the job:

command 1 system-view

command 2 wlan ap ap-name [ model model-name ]

command 3 radio radio-id

command 4 rrm

command 5 calibrate-channel pronto

By default, no command is assigned to a job.

4.        Return to system view.

quit

5.        Create a schedule and enter its view.

scheduler schedule schedule-name

6.        Assign a job to the schedule.

job job-name

By default, no job is assigned to a schedule.

7.        Assign a user role to the schedule.

user-role role-name

By default, the user role of the schedule creator is assigned to the schedule.

8.        Choose one of the following tasks:

¡  Specify an execution date and time for the schedule.

time at time date

¡  Specify one or more execution days and the execution time for the schedule.

time once at time [ month-date month-day | week-day week-day&<1-7> ]

¡  Specify the delay time for executing the schedule.

time once delay time

By default, no execution time is specified for a schedule.

Enabling auto-DFS

1.        Enter system view.

system-view

2.        Enter AP view or an AP group's AP model view.

¡  Enter AP view.

wlan ap ap-name

¡  Execute the following commands in sequence to enter an AP group's AP model view:

wlan ap-group group-name

ap-model ap-model

3.        Enter radio view.

radio radio-id

4.        Enter RRM view.

rrm

5.        Enable auto-DFS.

calibrate-channel self-decisive enable

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, auto-DFS is disabled.

6.        Set the auto-DFS mode to scheduled.

calibrate-channel mode scheduled

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, the auto-DFS mode is periodic.

Configuring on-demand DFS

Restrictions and guidelines

This feature consumes system resources. Use it with caution.

On-demand DFS does not necessarily trigger a channel change. The AC determines whether to perform a DFS based on the condition of the current working channel.

Procedure

1.        Enter system view.

system-view

2.        Enable on-demand DFS for radios of all APs.

wlan calibrate-channel pronto ap all

3.        (Optional.) Set the channel calibration interval.

wlan rrm calibration-channel interval minutes

By default, the channel calibration interval is 8 minutes.

Setting the DFS sensitivity mode

About DFS sensitivity modes

DFS supports the following sensitivity modes: low, medium, high, and custom. DFS configured with a higher sensitivity can be triggered more easily.

Restrictions and guidelines

DFS trigger parameters will be restored to the default if you change the sensitivity mode. The default settings vary by sensitivity mode. Record the configured DFS trigger parameters if necessary before you change the sensitivity mode from custom to low, medium, or high.

You can configure DFS trigger parameters only when the sensitivity mode is custom.

Procedure

1.        Enter system view.

system-view

2.        Enter AP view or an AP group's AP model view.

¡  Enter AP view.

wlan ap ap-name

¡  Execute the following commands in sequence to enter an AP group's AP model view:

wlan ap-group group-name

ap-model ap-model

3.        Enter radio view.

radio radio-id

4.        Enter RRM view.

rrm

5.        Set the DFS sensitivity mode.

calibrate-channel self-decisive sensitivity { custom | high | low | medium }

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, the DFS sensitivity mode is custom.

Configuring DFS trigger parameters

Restrictions and guidelines

As a best practice for accurate channel adjustment, configure the same DFS trigger parameters for all radios enabled with DFS.

You can configure DFS trigger parameters only when the DFS sensitivity mode is custom.

Procedure

1.        Enter system view.

system-view

2.        Enter AP view or an AP group's AP model view.

¡  Enter AP view.

wlan ap ap-name

¡  Execute the following commands in sequence to enter an AP group's AP model view:

wlan ap-group group-name

ap-model ap-model

3.        Enter radio view.

radio radio-id

4.        Enter RRM view.

rrm

5.        Set the CRC error threshold.

crc-error-threshold percent

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, the CRC error threshold is 20.

6.        Set the interference threshold.

interference-threshold percent

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, the interference threshold is 50.

7.        Set the channel usage threshold.

channel-usage-threshold percent percent

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, the channel usage threshold is 60.

8.        Set the tolerance level.

tolerance-level percent

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, the tolerance level is 20.

Configuring an RRM holddown group

About RRM holddown groups

To prevent frequent channel adjustments from affecting wireless services, you can add the specified radios to an RRM holddown group. Each time the channel of a radio in the RRM holddown group changes, the system starts a channel holddown timer for the radio. The channel for the radio does not change until the channel holddown timer expires.

If you execute on-demand DFS, the system performs DFS when the calibration interval expires regardless of whether the channel holddown time expires.

Procedure

1.        Enter system view.

system-view

2.        Create an RRM holddown group and enter its view.

wlan rrm-calibration-group group-id

3.        (Optional.) Set a description for the RRM holddown group.

description text

By default, no description is set for the RRM holddown group.

4.        Add a radio to the RRM holddown group.

ap ap-name radio radio-id

5.        (Optional.) Set the channel holddown time.

channel holddown-time minutes

By default, the channel holddown time is 720 minutes.

Configuring TPC

About TPC

The AC supports the following TPC methods:

·          Periodic auto-TPC—The AC automatically performs TPC for a radio at the power calibration interval.

·          On-demand TPC—The AC waits for a power calibration interval and then performs TPC for all radios. You must perform this task every time you want the AC to perform TPC for radios.

Tasks at a glance

To configure TPC, perform the following tasks:

1.        Choose the following tasks as needed:

¡  Configuring periodic auto-TPC

¡  Configuring on-demand TPC

2.        (Optional.) Setting the TPC mode

3.        (Optional.) Configuring TPC trigger parameters

4.        (Optional.) Setting the minimum transmit power

5.        (Optional.) Configuring an RRM holddown group

Configuration prerequisites

Make sure the power lock feature is disabled before configuring TPC. For more information about power lock, see "Configuring radio management."

Configuring periodic auto-TPC

1.        Enter system view.

system-view

2.        (Optional.) Set the power calibration interval.

wlan rrm calibration-power interval minutes

By default, the power calibration interval is 8 minutes.

3.        Enter AP view or an AP group's AP model view.

¡  Enter AP view.

wlan ap ap-name

¡  Execute the following commands in sequence to enter an AP group's AP model view:

wlan ap-group group-name

ap-model ap-model

4.        Enter radio view.

radio radio-id

5.        Enter RRM view.

rrm

6.        Enable periodic auto-TPC.

calibrate-power self-decisive enable

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, periodic auto-TPC is disabled.

Configuring on-demand TPC

Restrictions and guidelines

This feature consumes system resources. Use it with caution.

The AC waits for a power calibration interval after you enable on-demand TPC and then performs TPC for all radios.

Procedure

1.        Enter system view.

system-view

2.        Enable on-demand TPC for radios of all APs.

wlan calibrate-power pronto ap all

3.        (Optional.) Set the power calibration interval.

wlan rrm calibration-power interval minutes

By default, the power calibration interval is 8 minutes.

Setting the TPC mode

About TPC modes

The AC supports the density, coverage, and custom TPC modes. To avoid interference among APs, use the density mode. To increase signal coverage performance, use the coverage mode. If these two modes cannot meet your network requirements, use the custom mode to customize power adjustment settings.

Restrictions and guidelines

In either density or coverage mode, power adjustment settings are defined by the system and cannot be changed.

Procedure

1.        Enter system view.

system-view

2.        Enter AP view or an AP group's AP model view.

¡  Enter AP view.

wlan ap ap-name

¡  Execute the following commands in sequence to enter an AP group's AP model view:

wlan ap-group group-name

ap-model ap-model

3.        Enter radio view.

radio radio-id

4.        Enter RRM view.

rrm

5.        Set the TPC mode.

calibrate-power mode { coverage | custom | density }

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, the TPC mode is custom.

Configuring TPC trigger parameters

Restrictions and guidelines

The adjacency factor and power adjustment threshold determine TPC for a radio. The adjacency factor defines the quantity of manageable detected radios that trigger TPC and the ranking of the RSSI used for comparison with the power adjustment threshold. Set an appropriate adjacency factor as needed.

As a best practice for accurate power adjustment, configure the same TPC trigger parameters for all radios enabled with TPC.

Procedure

1.        Enter system view.

system-view

2.        Enter AP view or an AP group's AP model view.

¡  Enter AP view.

wlan ap ap-name

¡  Execute the following commands in sequence to enter an AP group's AP model view:

wlan ap-group group-name

ap-model ap-model

3.        Enter radio view.

radio radio-id

4.        Enter RRM view.

rrm

5.        Set the adjacency factor.

adjacency-factor neighbor

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, the adjacency factor is 3.

6.        Set the power adjustment threshold.

calibrate-power threshold value

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, the power adjustment threshold is 65 dBm.

7.        Specify the type of radios to participate in TPC calculation.

adjacency-factor radio-selection { all-channel | overlapping-channel }

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, all-channel radios participate in TPC calculation.

Setting the minimum transmit power

About the minimum transmit power

This feature ensures that a radio can still be detected after TPC is performed.

Procedure

1.        Enter system view.

system-view

2.        Enter AP view or an AP group's AP model view.

¡  Enter AP view.

wlan ap ap-name

¡  Execute the following commands in sequence to enter an AP group's AP model view:

wlan ap-group group-name

ap-model ap-model

3.        Enter radio view.

radio radio-id

4.        Enter RRM view.

rrm

5.        Set the minimum transmit power.

calibrate-power min tx-power

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, the minimum transmit power is 1 dBm.

Configuring an RRM holddown group

About RRM holddown groups

To prevent frequent power adjustments from affecting wireless services, you can add the specified radios to an RRM holddown group. Each time the power of a radio in the RRM holddown group changes, the system starts a power holddown timer for the radio. The power for the radio does not change until the power holddown timer expires.

If you execute on-demand DFS, the system performs DFS when the calibration interval expires regardless of whether the power holddown time expires.

Procedure

1.        Enter system view.

system-view

2.        Create an RRM holddown group and enter its view.

wlan rrm-calibration-group group-id

3.        (Optional.) Set a description for the RRM holddown group.

description text

By default, no description is set for the RRM holddown group.

4.        Add a radio to the RRM holddown group.

ap ap-name radio radio-id

5.        (Optional.) Set the power holddown time.

power holddown-time minutes

By default, the power holddown time is 60 minutes.

Configuring a radio baseline

About radio baselines

A radio baseline saves the working channel, transmit rate, and other radio attributes for radios. You can create a radio baseline by saving the current radio settings and apply the baseline to use these settings as needed.

A radio baseline is saved in a .csv file in the file system on the AC.

A radio baseline cannot be applied to a radio when one of the following conditions is met:

·          The radio is down.

·          No service template is bound to the radio or the bound service template is disabled.

·          The channel in the baseline is illegal.

·          The radio uses a manually specified channel.

·          The working channel or the transmit power of the radio is locked.

·          The channel or power holddown timer for the radio has not expired.

·          The channel in the baseline does not match the specified channel gap.

·          The transmit power in the baseline is lower than the specified minimum transmit power for the radio.

·          The transmit power in the baseline is higher than the specified maximum transmit power for the radio.

·          The radio mode, location identifier, or bandwidth in the baseline does not match the radio mode, location identifier, or bandwidth of the radio.

Procedure

1.        Enter system view.

system-view

2.        Create a radio baseline by saving the current radio settings.

wlan rrm baseline save name baseline-name { ap ap-name [ radio radio-id ] | ap-group group-name [ ap-model ap-model ] [ radio radio-id ] | global }

3.        Apply the baseline.

wlan rrm baseline apply name baseline-name

4.        (Optional.) Delete a radio baseline.

wlan rrm baseline remove name baseline-name

Enabling radio scanning

About radio scanning

This feature enables APs to scan the WLAN environment and report collected statistics to the AC at the specified interval. The AC uses the statistics to generate channel reports and neighbor reports.

To view the channel reports and neighbor reports, use the display wlan rrm-status ap command.

Restrictions and guidelines

This feature will be automatically enabled if you have configured periodic auto-DFS, scheduled auto-DFS, or periodic auto-TPC.

Procedure

1.        Enter system view.

system-view

2.        Enter AP view or an AP group's AP model view.

¡  Enter AP view.

wlan ap ap-name

¡  Execute the following commands in sequence to enter an AP group's AP model view:

wlan ap-group group-name

ap-model ap-model

3.        Enter radio view.

radio radio-id

4.        Enter RRM view.

rrm

5.        Enable radio scanning.

scan-only enable

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, radio scanning is disabled.

Setting the RRM calibration mode for AC hierarchy

About RRM calibration modes for AC hierarchy

Changing the RRM calibration mode can reduce the workload of the central AC or local ACs when DFS or TPC is configured on the central AC or local ACs.

The AC supports the following RRM calibration modes for AC hierarchy:

·          Central mode—The central AC performs RRM for APs configured on the central AC, and local ACs perform RRM for APs configured on local ACs. APs configured on the central AC can associate with the central or local ACs. This mode increases the central AC's workload.

·          Local mode—The central AC performs RRM only for APs associated with the central AC, and local ACs perform RRM for APs associated with local ACs. This mode increases local ACs' workload.

Restrictions and guidelines

This feature is available only on the central AC in an AC hierarchical network. For more information about central ACs, see "Configuring AC hierarchy."

Procedure

1.        Enter system view.

system-view

2.        Set the RRM calibration mode for AC hierarchy.

wlan rrm hierarchy-calibration mode { central | local }

By default, the RRM calibration mode for AC hierarchy is local.

Enabling SNMP notifications for WLAN RRM

About SNMP notifications for WLAN RRM

To report critical WLAN RRM events to an NMS, enable SNMP notifications for WLAN RRM. For WLAN RRM event notifications to be sent correctly, you must also configure SNMP as described in Network Management and Monitoring Configuration Guide.

Procedure

1.        Enter system view.

system-view

2.        Enable SNMP notifications for WLAN RRM.

snmp-agent trap enable wlan rrm

By default, SNMP notifications are disabled for WLAN RRM.

Setting the trap thresholds for adjacent-channel and co-channel interference

About the trap thresholds for adjacent-channel and co-channel interference

This feature enables the device to generate an SNMP notification when the adjacent-channel or co-channel interference exceeds the specified trap threshold.

Procedure

1.        Enter system view.

system-view

2.        Enter AP view or an AP group's AP model view.

¡  Enter AP view.

wlan ap ap-name

¡  Execute the following commands in sequence to enter an AP group's AP model view:

wlan ap-group group-name

ap-model ap-model

3.        Enter radio view.

radio radio-id

4.        Enter RRM view.

rrm

5.        Set the trap threshold for adjacent-channel interference.

adjacent-channel interference trap threshold threshold

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, the trap threshold for adjacent-channel interference is 60 dBm.

6.        Set the trap threshold for co-channel interference.

co-channel interference trap threshold threshold

By default:

¡  In RRM view, the configuration in an AP group's RRM view is used.

¡  In an AP group's RRM view, the trap threshold for co-channel interference is 60 dBm.

Display and maintenance commands for WLAN RRM

Execute display commands in any view.

 

Task

Command

Display radio baseline information.

display wlan rrm baseline { all | name baseline-name } [ verbose ]

Display the history records of radio baseline application.

display wlan rrm baseline apply-history [ verbose ]

Display RRM holddown group information.

display wlan rrm-calibration-group { all | group-id }

Display the channel and power adjustment history.

display wlan rrm-history ap { all | name ap-name }

Display WLAN RRM information.

display wlan rrm-status ap { all | name ap-name }

WLAN RRM configuration examples

Example: Configuring periodic auto-DFS

Network configuration

As shown in Figure 3, configure periodic auto-DFS to adjust channels for radios of the APs when a channel adjustment trigger condition is met. Add radio 1 of AP 1 to an RRM holddown group to avoid frequent channel adjustments.

Figure 3 Network diagram

Procedure

# Establish a CAPWAP tunnel between the AC and each AP. For more information, see "Managing APs." (Details not shown.)

# Enable auto-DFS for AP ap1 and set the auto-DFS mode to periodic.

<AC> system-view

[AC] wlan ap ap1 model WA4320H

[AC-wlan-ap-ap1] radio 1

[AC-wlan-ap-ap1-radio-1] rrm

[AC-wlan-ap-ap1-radio-1-rrm] calibrate-channel self-decisive enable

[AC-wlan-ap-ap1-radio-1-rrm] calibrate-channel mode periodic

# Configure DFS trigger parameters.

[AC-wlan-ap-ap1-radio-1-rrm] crc-error-threshold 20

[AC-wlan-ap-ap1-radio-1-rrm] interference-threshold 50

[AC-wlan-ap-ap1-radio-1-rrm] channel-usage-threshold percent 70

[AC-wlan-ap-ap1-radio-1-rrm] tolerance-level 20

[AC-wlan-ap-ap1-radio-1-rrm] quit

[AC-wlan-ap-ap1-radio-1] quit

[AC-wlan-ap-ap1] quit

# Create RRM holddown group 10.

[AC] wlan rrm-calibration-group 10

# Add radio 1 of AP ap1 to RRM holddown group 10.

[AC-wlan-rc-group-10] ap name ap1 radio 1

# Set the channel holddown time to 600 minutes.

[AC-wlan-rc-group-10] channel holddown-time 600

# Configure auto-DFS for AP 2 and AP 3 in the same way auto-DFS is configured for AP 1. (Details not shown.)

Verifying the configuration

# Execute the display wlan rrm-status ap all command. Verify that the working channels for radios of the APs change when a channel adjustment trigger condition is met and the calibration interval is reached. (Details not shown.)

Use the display wlan rrm-history ap all command to view the channel adjustment reason. (Details not shown.)

# Verify that the channel for radio 1 on AP 1 remains unchanged within 600 minutes after the first DFS. (Details not shown.)

Example: Configuring scheduled auto-DFS

Network configuration

As shown in Figure 4, configure scheduled auto-DFS to adjust channels for radios of the APs when a channel adjustment trigger condition is met.

Figure 4 Network diagram

Procedure

# Establish a CAPWAP tunnel between the AC and each AP. For more information, see "Managing APs." (Details not shown.)

# Create a time range.

<AC> system-view

[AC] time-range time1 from 15:20 2015/04/17 to 18:20 2015/04/17

# Create a job and assign commands to the job.

[AC] scheduler job calibratechannel

[AC-job-calibratechannel] command 1 system-view

[AC-job-calibratechannel] command 2 wlan ap ap1

[AC-job-calibratechannel] command 3 radio 1

[AC-job-calibratechannel] command 4 rrm

[AC-job-calibratechannel] command 5 calibrate-channel pronto

[AC-job-calibratechannel] quit

# Create a schedule and assign the job to the schedule.

[AC] scheduler schedule schedule1

[AC-schedule-schedule1] job calibratechannel

# Specify an execution date and time for the schedule.

[AC-schedule-schedule1] time at 20:20 2015/04/17

[AC-schedule-schedule1] quit

# Enable auto-DFS on AP ap1 and set the auto-DFS mode to scheduled.

[AC] wlan ap ap1

[AC-wlan-ap-ap1] radio 1

[AC-wlan-ap-ap1-radio-1] rrm

[AC-wlan-ap-ap1-radio-1-rrm] calibrate-channel self-decisive enable

[AC-wlan-ap-ap1-radio-1-rrm] calibrate-channel mode scheduled

# Configure AP ap1 to perform channel monitoring during time range time1.

[AC-wlan-ap-ap1-radio-1-rrm] calibrate-channel monitoring time-range time1

# Configure auto-DFS attributes.

[AC-wlan-ap-ap1-radio-1-rrm] crc-error-threshold 10

[AC-wlan-ap-ap1-radio-1-rrm] interference-threshold 40

[AC-wlan-ap-ap1-radio-1-rrm] channel-usage-threshold percent 70

[AC-wlan-ap-ap1-radio-1-rrm] tolerance-level 15

[AC-wlan-ap-ap1-radio-1-rrm] quit

# Configure auto-DFS for AP 2 and AP 3 in the same way auto-DFS is configured for AP 1. (Details not shown.)

Verifying the configuration

# Execute the display wlan rrm-status ap all command. Verify that the working channels for radios of the APs change when a channel adjustment trigger condition is met and the calibration interval is reached. (Details not shown.)

Use the display wlan rrm-history ap all command to view the channel adjustment reason. (Details not shown.)

Example: Configuring periodic auto-TPC

Network configuration

As shown in Figure 5, configure periodic auto-TPC and set the adjacency factor to 3 to enable the AC to perform periodic auto-TPC when AP 4 joins. Add radio 1 of AP 1 to an RRM holddown group to avoid frequent power adjustments.

Figure 5 Network diagram

Procedure

# Establish a CAPWAP tunnel between the AC and each AP. For more information, see "Managing APs." (Details not shown.)

# Enable periodic auto-TPC for AP ap1.

<AC> system-view

[AC] wlan ap ap1 model WA4320H

[AC-wlan-ap-ap1] radio 1

[AC-wlan-ap-ap1-radio-1] rrm

[AC-wlan-ap-ap1-radio-1-rrm] calibrate-power self-decisive enable

# Configure TPC trigger parameters.

[AC-wlan-ap-ap1-radio-1-rrm] adjacency-factor 3

[AC-wlan-ap-ap1-radio-1-rrm] calibrate-power threshold 80

[AC-wlan-ap-ap1-radio-1-rrm] calibrate-power min 1

[AC-wlan-ap-ap1-radio-1-rrm] quit

[AC-wlan-ap-ap1-radio-1] quit

[AC-wlan-ap-ap1] quit

# Create RRM holddown group 10.

[AC] wlan rrm-calibration-group 10

# Add radio 1 of AP ap1 to RRM holddown group 10.

[AC-wlan-rc-group-10] ap name ap1 radio 1

# Set the power holddown time to 100 minutes.

[AC-wlan-rc-group-10] power holddown-time 100

# Configure periodic auto-TPC for AP 2, AP 3, and AP 4 in the same way periodic auto-TPC is configured for AP 1. (Details not shown.)

Verifying the configuration

# Use the display wlan rrm-status ap all command to verify the following information:

·          AP 1 increases its transmit power when AP 4 detects that the power of AP 1 is lower than the power adjustment threshold.

·          AP 1 decreases its transmit power when AP 4 detects that the power of AP 1 is higher than the power adjustment threshold.

·          The adjusted power of AP 1 is not lower than the minimum transmit power (1 dBm in this example).

# Verify that the power of radio 1 on AP 1 remains unchanged within 100 minutes after the first TPC. (Details not shown.)

 

  • Cloud & AI
  • InterConnect
  • Intelligent Computing
  • Security
  • SMB Products
  • Intelligent Terminal Products
  • Product Support Services
  • Technical Service Solutions
All Services
  • Resource Center
  • Policy
  • Online Help
All Support
  • Become a Partner
  • Partner Resources
  • Partner Business Management
All Partners
  • Profile
  • News & Events
  • Online Exhibition Center
  • Contact Us
All About Us
新华三官网