Radio Settings

About Radio Settings

The Radio Settings tab allows you to configure settings related to the Wi-Fi access point radios at a location.

Note: By default, Radio Settings applied to a location are automatically inherited by its child locations. For example, suppose there is an HQ location with two child locations: Branch 1 and Branch 2. Then a radio setting applied to HQ automatically applies to Branch 1 and Branch 2. You can, however, customize the radio settings of a child location so that they are different from those of its parent.

An Arista AP has two radios (except for tri-radio models such as the C-110 and C-130, where a third radio acts as a sensor). One of the two radios operates in the 2.4GHz band and the other one in the 5GHz band. You can configure radio settings for each of these bands using the 2.4GHz and the 5GHz tabs. The newer Wi-Fi 6E APs have four radios, where three radios are dedicated access raios and the fourth radio is a multifunction radio. For more information on AP models and radios, see the AP matrix under AP Platforms in

You also have two new tabs to configure the 6 GHz band and Dual 5 GHz band. In the 6 GHz tab, the channels are arranged based on the UNII bands (UNII-5, UNII-6, etc.) because the number of allowed 6 GHz UNII bands varies depending on the regulatory domain. Rest of the options are the same as the 5 GHz or 2.4 GHz bands. Dual 5 GHz is hidden by default, but you can access it from the three-dots menu. 6 GHz and Dual 5 GHz configurations are applicable only for Wi-Fi 6E APs (such as C-360).

By default, an Arista AP selects its operating channel automatically when in AP mode. It picks a channel with minimum Wi-Fi interference. The AP first selects a channel when it boots. Then, it periodically looks for a better channel and changes its operating channel if necessary; you can specify this period in the Selection Interval field. So, once every Selection Interval, the AP checks if the Wi-Fi interference on the current channel has increased. If the interference has increased, then the AP looks for a channel with minimum Wi-Fi interference and starts operating on that channel.

In case of the 2.4GHz (i.e. 802.11 b/g/n) radio , you can select some or all of the available candidate channels. Similarly, for the 5GHz (i.e. 802.11 a/n/ac) and 6 GHz radios, you can select some or all of the available DFS channels and/or non-DFS channels as candidate channels. DFS stands for dynamic frequency selection. It is a mechanism using which interference by RADAR signals in 5GHz and 6 GHz are prevented. The available candidate channels depend on the country selected.
Note:If channel 14 is available as a candidate channel, and it is the only channel selected, we recommended you use the manual option and then select this channel. Channel 14 does not work with auto mode when it is the only candidate channel selected.

An Arista AP can steer a client to a different band or to another Arista AP. The Client Steering Common Parameters link at the bottom of the screen allows you to configure parameters common to both radios and to the different types of client steering. With these common settings, the different types of client steering work together towards the common goal of improving client Quality of Experience (QoE). For example, Smart Steering and Band Steering use the Common RSSI threshold as their reference. See What is Unified Client Steering for details.

Dual 5 GHz

In a dual 5 GHz band configuration, radio 2 operates in the lower 5 GHz band and radio 3 operates in the upper 5 GHz band. The 5 GHz band has 25 non-overlapping 20 MHz channels, which allows operation in the Dual 5 GHz mode without the lower and upper 5 GHz bands interfering with each other.

When Dual 5 GHz is enabled, those configurations will be given preference over 6 GHz configurations. That is, if you configure all the three radios — 2.4, 5, and 6 GHz, and then configure Dual 5 GHz as well, then the AP will ignore the configurations defined in 5 GHz and 6 GHz tabs, for C-360 APs.

Advanced Radio Settings

Under Advanced Radio Settings, you can configure transmit power, client steering and load balancing parameters, and admission control policies.

Transmit Power Selection

The Transmit Power value corresponds to the Effective Isotropic Radiated Power (EIRP). This is the value radiated by the antenna, i.e., the actual power transmitted "over-the-air". In case of external antennas, the transmit power at the AP port is adjusted according to the antenna gain to ensure that the power radiated over-the-air does not exceed regulatory restrictions.

You can set the Transmit Power Selection to Manual or Auto. In the Auto mode, an Arista AP automatically adjusts its transmit power to minimize interference with neighboring Arista APs.
Note: In addition to the minimum and maximum values specified on the UI, the actual transmit power used is constrained by the following factors:
  • The maximum value allowed in the regulatory domain,
  • The maximum power supported by the radio, and
  • The antenna gain.

Smart Steering

Smart Steering solves the "sticky client" problem. A sticky client is one that stays connected to an AP with poor signal strength, even when there is another AP that can offer better signal strength. In such situations, an Arista AP smartly steers a client to the better AP. Smart Steering thresholds ensure that an Arista AP does not steer clients too frequently, since that can worsen QoE.

Smart Client Load Balancing

In high-density user environments (Auditoriums, Lecture Halls, Conference Centers, Company meetings etc.) where APs are densely deployed to provide bandwidth to all clients, a client sees multiple APs with very good signal strength. Most clients will connect to the AP/band with the best signal strength resulting in a few heavily loaded APs. This could result in poor performance. Smart Client Load Balancing corrects this situation by steering clients to less loaded APs with good signal strength.

Band Steering

Band Steering is when an Arista AP steers a client from the 2.4GHz radio to the 5GHz radio because the 5GHz band has more non-overlapping channels and offers better speeds.
Note: Band steering is unidirectional, i.e., clients are always steered from 2.4GHz to 5GHz. As a result, you can configure Band Steering parameters only on the 2.4GHz tab, and not on the 5GHz tab.

WMM Admission Control Policy

Wi-Fi Multi Media (WMM) prioritizes the network traffic based on four access categories - voice, video, best effort and background. You can make Admission Control mandatory. If you do so, you must configure the admission control parameters for voice and video calls — the Maximum Allowed Calls count and the Maximum Share of Medium Time. You also need to set aside a fraction of these resources for roaming clients, under Roaming Reservation. This ensures that clients that roam on this SSID are guaranteed some resources when they are on a voice or a video call.

How Unified Client Steering Works

The following table shows the different types of client steering. They are classified based on when the client is steered (pre-association or post-association) and the criteria used to steer the client (Received Signal Strength Indicator (RSSI), load or band).
Table 1. Types of Client Steering
Stage Method Short Description
Pre-Association Min Association RSSI Rejects association request if client’s RSSI is less than the configured threshold
Band Steering Rejects association requests on 2.4 GHz for dual band clients. Band steering is unidirectional. The AP always steers a client from 2.4GHz to 5GHz because the 5GHz band has more non-overlapping channels and offers higher speeds.
Smart Client Load Balancing Rejects association request if the client load on an AP is high and less loaded neighbor APs are available
Post-Association Smart Steering Disconnects client if RSSI drops below a certain threshold
Band Steering When a 5GHz AP radio comes up after being down for a while (for example, due to Radar detection, auto channel selection epoch, or channel change due to high RF interference detection), AP steers dual band clients that were connected to 2.4 GHz when 5 GHz was down
Note:Unified Client Steering works only on 11ac Arista devices. It is not supported for 11n Arista devices.

General Considerations

Unified Client Steering binds different types of steering together in a well-defined, coherent framework. Two general considerations motivate Unified Client Steering:
  • APs must have a unified view of the network
  • Clients should not be steered too frequently

Inter Access Points Sync

An AP must have a unified, client-aware view of the network. That is, it must know how the network looks to its neighboring APs and to clients – both its own clients and those of the neighbors. The AP can then make informed steering decisions to ensure optimum client QoE.

To facilitate this, Arista APs periodically exchange information about their respective clients with each other. An Arista AP sends client RSSI value updates to its RF neighbors on the wired network.. Only its RF neighbors update the client RSSI values. So, each Arista AP maintains a database of the RSSI values of its clients and of the clients connected to its neighboring Arista APs. The AP incorporates this information into its steering algorithms. It steers a client only if the client’s RSSI is above the minimum threshold for at least one RF neighbor, i.e., only if the client has at least one other AP that it can successfully connect to.
Note: Sharing of client RSSI values among APs works only for tri-radio platforms such as C-130. All other features described in the document work for both dual-radio and tri-radio APs.

Example: Minimum Association RSSI

To appreciate the value of a unified view of the network, consider the client in figure Minimum Association RSSI Example. It is located between two APs, AP1 and AP2. Suppose the client’s RSSI values, as seen by both APs, are lower than the minimum needed to associate with them. Then, without Unified Client Steering, the client cannot connect because neither AP1 nor AP2 accepts the client’s association request. With Unified Client Steering, however, AP1 is CV-CUE of the client’s RSSI as seen by AP2 and vice versa. Because AP1 knows that there is no neighboring AP that can see the client with an RSSI greater than the minimum association threshold, it does not reject the client’s association request. This allows the client to connect, improving user experience.

Frequency of Client Steering

APs must not steer clients too frequently. Clients that are moving or happen to be in the coverage overlap region of two APs could “ping-pong” between the two APs because of constant back and forth steering. This is wasteful signaling and could cause poor user experience.

To avoid this, Arista APs should not attempt to steer a client too often. You can configure a Steering Attempts Threshold parameter that determines the maximum number of attempts to steer a client allowed in a 10-minute window (see Configuration section for details). The default value is 2. So, if an Arista AP has attempted to steer a client twice in 10 minutes, the client enters a configurable Blackout Interval (default 15 minutes). The AP does not attempt to steer such a client until the Blackout Interval has elapsed. An Arista AP shares the steering attempt epochs of its clients with its RF neighbors in its periodic wired-side broadcasts.

Example: Smart Steering

Figure Smart Steering Example shows a client located in the coverage overlap region between two APs, AP1 and AP2. The client’s RSSI could change quite frequently because of channel fading or because it might be moving. Without Unified Client Steering, when the client’s RSSI at AP1 drops below the configured threshold, AP1 steers it to AP2; when the RSSI at AP2 drops, the client is steered in the opposite direction. The client could thus constantly “ping-pong” between two APs. With Unified Client Steering, after being steered at most twice in 10 minutes, the client enters a 15-minute Blackout Interval (assuming all default values). This solves the client’s frequent “ping-pong” problem.

Configure Client Steering Common Parameters in Radio Settings

In Client Steering Common Parameters, the different types of client steering work together towards the common goal of improving client Quality of Experience (QoE).

To know more about parameters required in configuring Client Steering Common Parameters refer Client Steering Parameters.
To configure the Client Steering Common Parameters:
  1. Navigate to CONFIGURE > Device > Access Points > WiFi Radios.
  2. Click the Client Steering Common Parameters link at the bottom of the screen.
  3. Enter value for Steering RSSI Threshold.
  4. Set max number of steering attempts for a client in Steering Attempts Threshold field.
  5. Set steering suspension period for a client in Steering Blackout Period field.
  6. Click Save.

What is Unified Client Steering

An Arista AP can steer a client to a different band or to another Arista AP. Clients can be steered before or after association. The decision to steer a client is based on considerations such as signal strength, load (i.e. number of clients connected to the radio) and the preferred band of operation. While client steering is important for best user Quality of Experience (QoE), frequent and ad-hoc steering of the client can in fact worsen the QoE. Arista APs use an approach called Unified Client Steering. In this approach, APs exchange information with each other, resulting in a “big picture” view of the client experience. Different types of client steering then work together towards the common goal of improving client QoE. For example, Smart Steering and Band Steering use the Common RSSI threshold as their reference.

Client Steering Parameters

Field Description
Client Steering Common Parameters
Client Steering Common Parameters Client Steering Common Parameters can be configured only on11ac devices.
Steering RSSI Threshold The steering RSSI threshold can be between -60 to - 85 dBm. Default value is -70 dBm.
Steering Attempts Threshold This is the max number of steering attempts for a client within a 10 minutes window after which the client's steering is suspended for a period specified by Steering Blackout Period. The default value for steering attempts is 2. The minimum value is 1 and maximum value is 5.
Steering Blackout Period This is the steering suspension period for a client. No steering methods would be employed for a client if it sojourns within this time period. The default value for steering blackout period is 15 minutes. The minimum value is 10 minutes and maximum is 60 minutes.

Configure Basic Radio Settings

You can configure Radio Settings for both 2.4GHz and 5GHz. The configuration is location specific.

To know more about the Radio Settings parameters refer Basic Radio Settings Parameters.
To configure basic radio settings:
  1. Navigate to CONFIGURE > Device > Access Points
  2. Select the RF Regulatory Domain.
  3. Select the frequency band under Wi-Fi Radios tab.
  4. Configure the Operating Channel section.
  5. Choose Auto or Manual Channel Selection. Choose from:
    • If Channel Selection is Auto, then provide appropriate values for the fields below.
      • Channel Width
      • Selection Interval in hours
      • Selection Mode - Select Scheduled to run ACS at a specific time of the day and minimize service disruption. Select Periodic to run ACS at defined time intervals.
      • Dynamic Channel Selection to enable automatic switching of the current channel to an available channel with lower interference.
      • Select Candidate Channels depending on the chosen Wi-Fi Regulatory Domain.
    • If Channel Selection is Manual then provide the appropriate Channel Number.
  6. Click Save.

Basic Radio Settings Parameters

Field Description
Operating Region Contains list of region or country, default it United States. User is allowed to change it if he has an entitlement or license.
Frequency Band The radio frequency band. You can configure the radio frequency for 2.4 GHz, 5 GHz, 6 GHz, and Dual 5 GHz. Default value is 2.4 GHz.
Operating Channel The operating channel for the radio. By default, the AP automatically selects the operating channel as automatically (Auto). User can manually set the channel if desired. Select Manual, to set the operating channel. Based on the location selected, a list of channel numbers are presented for manual channel selection. If the manually selected channel is not present in the country of operation selected for the device in the applied AP template, the AP automatically reverts to Auto mode and selects a channel.
Channel Width The channel width for the radio. Possible values are 20 MHz or 20 MHz /40 MHz. In case of a/n/ac devices, the 20/40/80+80 MHz and 20/40/80/160 MHz options are available. The options are enabled for 2.4 GHz, 5 GHz, and 6 GHz modes.
Selection Interval This field is visible only when the Operating Channel is set to Auto. This field specifies the time interval, in hours, at which the channel selection happens. You can enter any value from 1 to 48. The channel may change automatically after this time interval if some other channel is found to have lower interference than the current channel.
Dynamic Channel Selection This field is visible only when the Operating Channel is set to Auto . Select the Dynamic Channel Selection check box to enable automatic switching of the current channel to an available channel with lower interference, when the interference on the current channel increases. The mechanism is independent of the Selection Interval, and channel is changed only when the interference on current channel is very high.
Candidate Channels This field is relevant in case of auto-channel selection. It enhances the behavior of auto-channel selection. The AP dynamically checks if the current channel interference has increased and selects a channel with lower interference and diverts the traffic to this channel. For countries where channel 13 or above are permitted on the b/g band, only the channels 1,5,9,13 are selected, by default. You can modify the candidate channel list.
Auto Channel Selection(ACS) Mode ACS has two selection modes, Scheduled and Periodic. In Scheduled ACS, you can define the duration in hours and minutes. The AP radio checks for interference and contention every day during the scheduled time. You can also specify a secondary time to run the ACS. The duration between the two scheduled ACS must be at least 60 minutes. Else, you will receive an error message and you will not be able to schedule the ACS. The Scheduled ACS is a per-radio setting. So, you need to define the ACS schedule for each band. In Periodic ACS, you can specify the time duration in hours, to run ACS at pre-defined time intervals.

Configure 802.11ax Settings


Until 802.11ac, Wi-Fi standards focussed on increasing peak data rates. With 802.11ax, although the data rates increase, the focus is on improving Wi-Fi capacity—a must for high-density environments. Given the large number and variety of Wi-Fi devices in dense environments, capacity is no longer just about the number of simultaneous users supported; it is about optimally allocating resources to meet the Quality of Service (QoS) requirements for the largest number of users. 802.11ax features such as OFDMA, MU-MIMO, and Spatial Reuse are best understood in this light.
Note: All Arista 802.11ax APs do not support all the enhancements. For details on which AP supports which 802.11ax features, please check the AP datasheet on the page or the AP Feature Matrix on the Wi-Fi Help Portal.


Multiple Input Multiple Output (MIMO) refers to the use of multiple antennas on Wi-Fi APs and clients to increase data rates (via spatial multiplexing) and reduce interference (via spatial diversity). Multiple antennas result in multiple, simultaneous “streams” of data between an AP and a client on the same channel. Multi-user MIMO (MU-MIMO) uses the multiple-antenna streams not to improve the transmission to a single user but to simultaneously serve multiple users, i.e., to improve capacity rather than user data rates. The figure below shows an example of MU-MIMO where four streams on the AP can simultaneously serve two clients, each with support for two streams.

Downlink MU-MIMO

Depending on the channel conditions of a client, an AP can use Single User MIMO (SU-MIMO) to improve the client’s data rates or reduce its error rates. Both, however, are per-link improvements. Since dense environments are about capacity and not just individual user data rates, downlink MU-MIMO can help in dense environments by allocating resources (i.e. streams) more efficiently among a large number of users. 802.11ax supports 8x8 MIMO on the downlink, i.e., an AP can simultaneously send data to eight users.

Uplink MU-MIMO

Uplink MU-MIMO is especially useful for uplink-heavy applications such as social media, content sharing, and video calls. As with the downlink, uplink MU-MIMO increases capacity compared to the SU-MIMO case. This results in a better user experience when uploading content. 802.11ax supports 8x8 MIMO on the uplink, i.e., eight users can simultaneously send their data to an AP. Early 802.11ax Wi-Fi clients might not support uplink MU-MIMO and for the ones that do, the implementation is not yet mature across client manufacturers. If your 802.11ax network has throughput problems, you might want to disable uplink MU-MIMO.


Orthogonal Frequency Division Multiple Access (OFDMA) divides the Wi-Fi channel into subcarriers, also called “tones”, each 78.125 KHz wide. Tones are combined to form Resource Units (RUs) of different widths. As shown in the representation below, an RU can consist of 26, 52, 106, or 242 tones—corresponding to channel widths of approximately 2 MHz, 4 MHz, 8 MHz, and 20 MHz. In each scheduling interval, OFDMA allocates one or more RUs of different widths to multiple users, resulting in an efficient and flexible use of the channel.

802.11ax uses OFDMA to support multiple users simultaneously, but the underlying multiple access mechanism continues to be CSMA-CA with backoff. Users are scheduled simultaneously, but only when CSMA-CA determines that the medium is available for transmission.

Downlink OFDMA

On the downlink, an 802.11ax Arista AP intelligently schedules clients and allocates resources. Until 802.11ac, an entire 20/40/80 MHz channel would be allocated to a single user during one time slot. This is not optimal because the client application may use only a fraction of the channel. Downlink OFDMA uses the channel much more efficiently by distributing it among clients, allocating only as much of the channel to each client as needed and changing the allocation when needed. The resource allocation and scheduling are based on factors such as the application QoS required and the channel conditions. An 802.11ax AP has the flexibility to allocate any combination of RUs. The figure below shows an example of an AP allocating RUs in three scheduling intervals.

In the first scheduling interval, the AP allocates two 52-tone RUs to Client 1 and Client 2, and one 26-tone RU to Client 3. In the second interval, it allocates the whole 20 MHz channel—a single, 242-tone RU—to Client 1. And in the third interval, it allocates two 106-tone RUs to Client 2 and Client 3.

Uplink OFDMA

The Wi-Fi uplink is a distributed form of communication because the transmitters (i.e., clients) cannot coordinate their schedules (unlike the downlink, where the AP is both the transmitter and the scheduler). Until 802.11ac, Wi-Fi uplink was uncoordinated: clients contended for the medium and, based on randomly distributed timing, sent packets to the AP. This works reasonably well for single or sparse AP deployments, but for dense deployments, this can cause high uplink contention in presence of a large number of clients. With 802.11ax, the Wi-Fi uplink is coordinated. The AP manages the uplink resource allocation via mechanisms that essentially coordinate the transmission schedule among clients while using CSMA-CA to ensure that the medium is available for transmission. This leads to reduced uplink contention, thereby improving capacity and user experience. Early 802.11ax Wi-Fi clients might not support uplink OFDMA and for the ones that do, the implementation is not yet mature across client manufacturers. This may adversely affect the 802.11ax AP throughput. If your 802.11ax network has throughput problems, you might want to disable uplink OFDMA.

Spatial Reuse

With spatial reuse, two or more Wi-Fi devices (AP or client) that support 802.11ax protocols can send transmissions simultaneously without any significant data loss. Spatial Reuse helps in improving the spectral efficiency and optimal allocation of resources to meet the Quality of Service (QoS).

How Spatial Reuse Improves Efficiency?

To understand spatial reuse, consider the two co-channel BSSs as shown in figure below.

BSS1 and BSS2 operate on the same channel and can hear each other with an RSSI higher than the Clear Channel Access Signal Detection (CCA-SD) level, the threshold that Wi-Fi devices use to decide if the channel is clear to transmit or if they need to wait for the . A co-channel BSS that can be heard at an RSSI greater than the threshold is called an overlapping BSS (OBSS). Thus, BSS2 is an OBSS for BSS1, and vice versa.

Before Wi-Fi 6, if a Wi-Fi device detected an ongoing transmission with RSSI higher than CCA-SD on a specific channel, all other devices on the same channel had to back off and they would wait for the ongoing transmission to get over. With Wi-Fi 6, a device can leverage spatial reuse to transmit in parallel with an ongoing OBSS transmission, provided the spatial reuse transmission is at an acceptably low transmit power.

BSS Color

A Wi-Fi device that wants to transmit using spatial reuse needs to distinguish the transmissions of its own BSS from those of the OBSS. To enable this, Wi-Fi 6 introduces BSS color, an integer between 1 and 63 to identify a BSS. An AP radio automatically assigns a BSS color to each transmission. When two radios transmit on the same channel, BSS color helps an AP to differentiate between an inter-BSS transmission and intra-BSS transmission.

Typically, every 802.11ax HE (High Efficiency) frame contains a BSS color value that a Wi-Fi device can use to identify the frame as its own BSS or an OBSS. The BSS color is signaled in the 802.11ax PHY preamble, allowing for early detection of an OBSS transmission. Since a Wi-Fi 6 device instantly decodes the HE preamble, the device can identify an OBSS transmission well in advance to transmit in parallel.

As long as BSSs in vicinity of each other use distinct BSS colors, a device can distinguish the transmissions of its own BSS from those of an OBSS.

Enabling Spatial Reuse

To enable spatial reuse,
  1. Click the WiFi Radio tab.
  2. Select a frequency band and scroll down to 802.11ax Enhancements.
  3. Click the Spatial Reuse (SR) checkbox.
  4. Specify your OBSS Packet Detection Threshold. If the RSSI of an ongoing BSS transmission is below the specified level but within the range of -81 to -62 dBm, the OBSS device can transmit in parallel.
  5. Save the settings.

Configure Transmit Power Selection in Radio Settings

You can fix the transmit power of an AP manually or you can configure an AP to automatically adjust its own transmit power.

To know more in detail about the configuring parameters refer Transmit Power Selection Parameters.
To configure Transmit Power Control in radio settings:
  1. Navigate to CONFIGURE > Device > Access Points.
  2. Click WiFi Radios tab,
  3. Move to Transmit Power Selection Settings.
  4. Select Auto option.
  5. Enter the appropriate values for the following fields.
    • Loudness RSSI
    • Neighbor Count
    • Minimum Transmit Power
    • Maximum Transmit Power
  6. Select Manual option.
  7. For access points that use an external antenna, select Use External Antennas and enter the External Antenna Gain in dB.
  8. Click Save.

Transmit Power Selection Parameters

Field Description
Advanced Radio Settings
Transmit Power Selection (Auto and Manual radio buttons) This field enables you to control the transmission power of the AP. It is a mandatory field.
  • Manual - Select the Manual option to manually specify the transmission power of the AP in dbm.
  • Automatic - Select the Automatic option to have the AP automatically adjust its transmit power so as to minimize interference with neighboring Arista APs The neighbor APs must be connected to the same Wireless Manager instance ID (should have same CUSTOMER ID) and must have at least one profile ID.
Loudness RSSI An AP is considered loud if it can be heard by a neighbor AP with an RSSI greater than this value . Allowed range is-95 dBm to 0 dBm. The default is -75 dBm.
Neighbor Count Maximum number of allowed loud neighbor APs. Allowed range is 1 - 10. The Default value is default 3.
Minimum Transmit Power Minimum transmission power. Allowed range is 4 - 30 dBm. The Default value is 4 dBm.
Maximum Transmit Power Maximum transmission power. Allowable range is 4 - 30 dBm. The Default value is 30 dBm.

Configure Smart Steering in Radio Settings

Smart Steering feature helps you to resolve the issue of sticky client.

To configure Smart Steering in Radio Settings:
  1. Navigate to CONFIGURE > Device > Access Points > WiFi Radios.
  2. In the Smart Steering section enter the time interval, in seconds for Roam Initiation Interval.

    Info:Roam Initiation Interval is the time interval, for which the client's signal strength should be lower than the Roam Initiation RSSI Threshold for the AP to initiate the roam. The time can range from 5 to 900. Default value is 10.

  3. Enter the RSSI threshold to disconnect a client in Roam Initiation Packet Threshold field.

    Info:When the signal strength of the client is less than this threshold, the AP disconnects the client and initiates a roam. The packet threshold can be between 5 to 500. Default value is 5.

  4. Click Save.

Configure Smart Client Load Balancing in Radio Settings

Smart Client Load Balancing is configured per SSID but it acts per radio. The radio is shared by all SSIDs associated with the band (2.4 or 5GHz). Balancing clients across APs provides each client a larger slice of radio time. The balancing mechanism may deny immediate access to the AP when a client roams. Clients that use real-time applications such as video and voice may be impacted. It is not recommended that Smart Client Load Balancing be enable on SSIDs that support real-time applications.

To configure Smart Client Load Balancing in radio settings:
  1. Navigate to CONFIGURE > Device > Access Points > WiFi Radios.
  2. In the Smart Client Load Balancing section enter the minimum number of clients that can connect to an AP in Minimum Client Load field.

    Info:This field lets you specify the minimum number of clients that can connect to an AP before client load balancing is triggered. The default value for this field is 30 and the threshold is 45. The minimum client load on each radio is taken into consideration while the load on a single AP is checked.

  3. Enter The minimum difference between the number of clients connected on neighboring APs in Minimum Client Load Difference field.

    Info:This minimum difference is considered to balance client load. Default value is 5 and range varies from 2 to 10.

  4. Click Save.

Configure Band Steering in Radio Settings

Band steering is a load balancing feature that lets the Wi-Fi client switch to the other available band to balance the load of the Arista access point in case more clients are operating on a single band.

To configure Band Steering in Radio Settings:

  1. Navigate to CONFIGURE > Device > Access Points > WiFi Radios.
  2. Scroll down to Band Steering section.
  3. Enter the value for Band Steering Client Load Difference.

    Info:It is the load balancing parameter that is useful for tuning the load distribution between 2.4 GHz and 5 GHz bands. If the difference between the number of clients associated in 5 GHz and 2.4 GHz exceeds the threshold, band steering to 5 GHz is not performed until the difference comes below the threshold. Default value for this field is 25 and the threshold is 50.

  4. Click Save.

Configure WMM Admission Control Policy in Radio Settings

Wi-Fi Multi Media (WMM) prioritizes the network traffic. Configuration is done for the admission control parameters for voice and video calls. All the fields involved in configuration will be configured depending upon the choice made between video or voice calls.

To configure WMM admission control policy in radio settings:
  1. Navigate to CONFIGURE > Device > Access Points > WiFi Radios.
  2. Scroll Down to WMM Admission Control Policy.
  3. Select Admission control policy as Voice Calls or Video Calls.
  4. Select Admission Control Mandatory to make admission control mandatory.
  5. Select No Ack Policy to enable no acknowledgement policy.

    Info:When you enable no acknowledgement policy, the acknowledgement for the unicast QoS data packets is not required from the receiver. No retransmission take place for the QoS data packets when the no ack policy is enabled.

  6. Provide the maximum number of allowed voice or video calls depending upon choice in Maximum Allowed Calls field.

    Info:Limit for number of voice calls is 127.

  7. Enter the maximum percentage share of the medium time for voice calls in Maximum Share Of Medium Time field.

    Info:The value for maximum percentage share ranges from 0 to 100. Default value is 0.

  8. Enter the number of voice calls reserved for roaming clients in Call Reserved field.

    Info:The range for this field is from 0 to the number of maximum allowed calls specified in Maximum Allowed Calls field.

  9. Enter the percentage share of the medium time reserved for roaming clients in Share Of Medium Time Reserved field.

    Info:The range for percentage share is from 0 to the percentage share specified in Maximum Share Of Medium Time field.

  10. Click Save.