Data Rate Trimming

The following scenarios show how to configure WLAN-capable devices to remove slow rates, improve air time, and increase overall performance.

802.11g Data Rate Trimming

Description

In this example, a WLAN interface will be created on top of the 2.4 GHz radio module. Then, several sets of 802.11g data rates will be disabled so that slow rates do not penalize performance. Note that the management rate will be automatically set to the slowest data rate allowed.

Scenario

Step 1: Set the following configuration in DUT0 :

set controllers wlan radios wifi1 band 2.4GHz
set controllers wlan radios wifi1 channel 1
set controllers wlan radios wifi1 mode 802.11n
set interfaces bridge br0
set interfaces wlan wlan4 bridge-group bridge br0
set interfaces wlan wlan4 phy wifi1
set interfaces wlan wlan4 type access-point security akm none
set interfaces wlan wlan4 type access-point ssid network_2.4GHz
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Note

By default, when no 802.11g rate is disabled, the following rates are announced: 1(B), 2(B), 5.5(B), 11(B), 6, 9, 12, 18, 24, 36, 48, 54. Note that the basic rates are labeled (B) and must be supported by clients in order to connect to the access point. The management data rate will be automatically set to 1 Mbps.

Step 2: Run the command configure on DUT0 and expect no output.

Step 3: Run the command delete interfaces wlan wlan4 type access-point disable-rates on DUT0 and expect the following output:

Step 4: Run the command commit on DUT0 and expect no output.

Step 5: Set the following configuration in DUT0 :

set controllers wlan radios wifi1 band 2.4GHz
set controllers wlan radios wifi1 channel 1
set controllers wlan radios wifi1 mode 802.11n
set interfaces bridge br0
set interfaces wlan wlan4 bridge-group bridge br0
set interfaces wlan wlan4 phy wifi1
set interfaces wlan wlan4 type access-point disable-rates 802.11g 1,2,5.5,11
set interfaces wlan wlan4 type access-point security akm none
set interfaces wlan wlan4 type access-point ssid network_2.4GHz
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Note

To disable the 802.11b rates, just disable the 1, 2, 5.5 and 11 data rates. Note that no 802.11b station will be able to connect to the device. Performance can be further increased by removing even more rates. Note that this operation has a direct impact on coverage, since slower rates are less affected by noise. Also, the slowest data rate allowed will always be labeled basic rate (since at least one of the supported rates must be marked as such).

Step 6: Set the following configuration in DUT0 :

set controllers wlan radios wifi1 band 2.4GHz
set controllers wlan radios wifi1 channel 1
set controllers wlan radios wifi1 mode 802.11n
set interfaces bridge br0
set interfaces wlan wlan4 bridge-group bridge br0
set interfaces wlan wlan4 phy wifi1
set interfaces wlan wlan4 type access-point disable-rates 802.11g 1,2,5.5,11,6,9
set interfaces wlan wlan4 type access-point security akm none
set interfaces wlan wlan4 type access-point ssid network_2.4GHz
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Note

The previous example set the minimum speed to 12 Mbps.

Step 7: Set the following configuration in DUT0 :

set controllers wlan radios wifi1 band 2.4GHz
set controllers wlan radios wifi1 channel 1
set controllers wlan radios wifi1 mode 802.11n
set interfaces bridge br0
set interfaces wlan wlan4 bridge-group bridge br0
set interfaces wlan wlan4 phy wifi1
set interfaces wlan wlan4 type access-point disable-rates 802.11g 1,2,5.5,11,6,9,12,18
set interfaces wlan wlan4 type access-point security akm none
set interfaces wlan wlan4 type access-point ssid network_2.4GHz
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Note

The previous example set the minimum speed to 24 Mbps.

Step 8: Expect a failure in the following command: Set the following configuration in DUT0 :

set controllers wlan radios wifi1 band 2.4GHz
set controllers wlan radios wifi1 channel 1
set controllers wlan radios wifi1 mode 802.11n
set interfaces bridge br0
set interfaces wlan wlan4 bridge-group bridge br0
set interfaces wlan wlan4 phy wifi1
set interfaces wlan wlan4 type access-point disable-rates 802.11g 1,2,5.5,11,6,9,12,18,24,36,48,54
set interfaces wlan wlan4 type access-point security akm none
set interfaces wlan wlan4 type access-point ssid network_2.4GHz
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Note

Disabling all rates is not allowed. A minimum of one is required for operation.

802.11a Data Rate Trimming

Description

In this example, a WLAN interface will be created on top of the 5 GHz radio module. Then, several sets of 802.11a data rates will be disabled so that slow data rates do not penalize performance. Note that the management rate will be automatically set to the slowest data rate allowed.

Scenario

Step 1: Set the following configuration in DUT0 :

set controllers wlan installation indoor
set controllers wlan radios wifi0 band 5GHz
set controllers wlan radios wifi0 channel 36
set controllers wlan radios wifi0 mode 802.11ac
set controllers wlan radios wifi0 mode 802.11ax
set controllers wlan radios wifi0 mode 802.11n
set interfaces bridge br0
set interfaces wlan wlan1 bridge-group bridge br0
set interfaces wlan wlan1 phy wifi0
set interfaces wlan wlan1 type access-point security akm none
set interfaces wlan wlan1 type access-point ssid network_5GHz
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Note

By default, when no 802.11a rate is disabled, the following rates are announced: 6(B), 9, 12(B), 18, 24(B), 36, 48, 54. The management data rate will be automatically set to 6 Mbps.

Step 2: Run the command configure on DUT0 and expect no output.

Step 3: Run the command delete interfaces wlan wlan1 type access-point disable-rates on DUT0 and expect the following output:

Step 4: Run the command commit on DUT0 and expect no output.

Note

Performance can be further increased by removing even more rates. Like the 802.11g rates, this operation has a direct impact on coverage (since slower rates are less affected by noise).

Step 5: Set the following configuration in DUT0 :

set controllers wlan installation indoor
set controllers wlan radios wifi0 band 5GHz
set controllers wlan radios wifi0 channel 36
set controllers wlan radios wifi0 mode 802.11ac
set controllers wlan radios wifi0 mode 802.11ax
set controllers wlan radios wifi0 mode 802.11n
set interfaces bridge br0
set interfaces wlan wlan1 bridge-group bridge br0
set interfaces wlan wlan1 phy wifi0
set interfaces wlan wlan1 type access-point disable-rates 802.11a 6,9
set interfaces wlan wlan1 type access-point security akm none
set interfaces wlan wlan1 type access-point ssid network_5GHz
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Note

The previous example set the minimum speed to 12 Mbps.

Step 6: Set the following configuration in DUT0 :

set controllers wlan installation indoor
set controllers wlan radios wifi0 band 5GHz
set controllers wlan radios wifi0 channel 36
set controllers wlan radios wifi0 mode 802.11ac
set controllers wlan radios wifi0 mode 802.11ax
set controllers wlan radios wifi0 mode 802.11n
set interfaces bridge br0
set interfaces wlan wlan1 bridge-group bridge br0
set interfaces wlan wlan1 phy wifi0
set interfaces wlan wlan1 type access-point disable-rates 802.11a 6,9,12,18
set interfaces wlan wlan1 type access-point security akm none
set interfaces wlan wlan1 type access-point ssid network_5GHz
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Note

The previous example set the minimum speed to 24 Mbps.

Step 7: Expect a failure in the following command: Set the following configuration in DUT0 :

set controllers wlan installation indoor
set controllers wlan radios wifi0 band 5GHz
set controllers wlan radios wifi0 channel 36
set controllers wlan radios wifi0 mode 802.11ac
set controllers wlan radios wifi0 mode 802.11ax
set controllers wlan radios wifi0 mode 802.11n
set interfaces bridge br0
set interfaces wlan wlan1 bridge-group bridge br0
set interfaces wlan wlan1 phy wifi0
set interfaces wlan wlan1 type access-point disable-rates 802.11a 6,9,12,18,24,36,48,54
set interfaces wlan wlan1 type access-point security akm none
set interfaces wlan wlan1 type access-point ssid network_5GHz
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Note

Disabling all rates is not allowed. A minimum of one is required for operation.