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Smart RF 2


Userlevel 2
Hello Community,

1. I want to know the criteria and the time is taking to Smart RF 2 (WING 5.9.2) to shutdown the radio when it's needed.

2. Smart RF in generally doing calculation based on the sniffing the neibours, but not based on the wireless client's info was shared by the wireless clients.
Can we add the data to SMART RF calculation algorithm with enabling "radio-resource-measurement" in WLAN config ? Or it's performing some other function?

Thanks,

Aviv

11 replies

Hello Aviv,

Question 1 answer:
Select Shutdown feature run interval is set in "frequency" parameter under "select shutdown" in Smart RF policy.

There are two thresholds : "cci-high-threshold" and "cci-low-threshold" where CCI stands for Co-Channel Interference.

Every time Select Shutdown is run, the CCI interference is calculated. If it is found to be higher than the high threshold, one or more 2.4GHz radio will be mapped to SSD_Hidden. SSD_Hidden is a special wlan that users will not be able to associate to. The radio runs in the background to continue monitoring the environment. For this reason, the radio state will not show as "Off", but rather, "Hidden".

The next time Select Shutdown is run, if the RF environment situation change and the average CCI falls below the lower threshold, the algorithm considers "Awaken"ing previously hidden radios. It does so by selecting the ones that will cause the least CCI to its neighbors. It continues to do so until CCI is estimated to cross the lower threshold but not the higher threshold.

References:

https://documentation.extremenetworks.com/WiNG/5.9.2/WCSRG/WiNG/GUI_Reference/topics/t_configuring_smart_rf_policy_select_shutdown.shtml
and here: page 1643:

https://documentation.extremenetworks.com/WiNG/5.9.2/CRG/9035491_WiNG_5_9_2_WC_CRG.pdf

Question 2 answer:
Smart RF is not currently utilizing radio resource measurement reports from clients.
Userlevel 2
Hello Abdulla,

Thank you for your reply!

What is the goal of using radio resource measurement ?

Thanks,

Aviv
Userlevel 2
Hello All,

Shutting down radios don't work for me also after 20 minutes/

2 pieces of AP7532 WING 5.9.2

There is the outputs + smart rf run config:



VC#show smart-rf select-shutdown
--------------------------------------------------------------------------------
RADIO RADIO-MAC STATE
--------------------------------------------------------------------------------
VC:R1 B8-50-01-XX-XX-XX On
ap7532-XXXXXX:R1 B8-50-01-XX-XX-XX On
--------------------------------------------------------------------------------
VC#show running-config smart-rf-policy 777 include-factory
smart-rf-policy 777
enable
no group-by area
no group-by floor
sensitivity custom
assignable-power 5GHz max 17
assignable-power 5GHz min 4
assignable-power 2.4GHz max 4
assignable-power 2.4GHz min 4
channel-list 5GHz 21,25,36,40,44,48,52,56,60,64,100,104,108,112,116,120,124,128,132,136,140,149,153,157,161,165,173,184,188,192,196,208,212,216
channel-list 2.4GHz 1
channel-width 5GHz 40MHz
channel-width 2.4GHz 20MHz
avoidance-time dfs 90
avoidance-time adaptivity 90
smart-ocs-monitoring
smart-ocs-monitoring off-channel-duration 5GHz 50
smart-ocs-monitoring off-channel-duration 2.4GHz 50
smart-ocs-monitoring frequency 5GHz 6
smart-ocs-monitoring frequency 2.4GHz 6
smart-ocs-monitoring sample-count 5GHz 5
smart-ocs-monitoring sample-count 2.4GHz 10
smart-ocs-monitoring extended-scan-frequency 5GHz 5
smart-ocs-monitoring extended-scan-frequency 2.4GHz 5
smart-ocs-monitoring power-save-aware 5GHz dynamic
smart-ocs-monitoring power-save-aware 2.4GHz dynamic
smart-ocs-monitoring voice-aware 5GHz dynamic
smart-ocs-monitoring voice-aware 2.4GHz dynamic
no smart-ocs-monitoring client-aware 5GHz
no smart-ocs-monitoring client-aware 2.4GHz
no smart-ocs-monitoring tx-load-aware 5GHz
no smart-ocs-monitoring tx-load-aware 2.4GHz
no smart-ocs-monitoring awareness-override threshold
interference-recovery
interference-recovery noise
interference-recovery noise-factor 1.5
interference-recovery neighbor-offset 5
interference-recovery interference
interference-recovery client-threshold 50
interference-recovery channel-switch-delta 5GHz 20
interference-recovery channel-switch-delta 2.4GHz 20
neighbor-recovery
select-shutdown
neighbor-recovery power-threshold 5GHz -70
neighbor-recovery power-threshold 2.4GHz -70
select-shutdown cci-high-threshold -80
select-shutdown cci-low-threshold -100
select-shutdown frequency-limiter 1
select-shutdown frequency 6
coverage-hole-recovery
coverage-hole-recovery interval 5GHz 30
coverage-hole-recovery interval 2.4GHz 30
coverage-hole-recovery coverage-interval 5GHz 10
coverage-hole-recovery coverage-interval 2.4GHz 10
coverage-hole-recovery snr-threshold 5GHz 20
coverage-hole-recovery snr-threshold 2.4GHz 20
coverage-hole-recovery client-threshold 5GHz 1
coverage-hole-recovery client-threshold 2.4GHz 1
interference-recovery channel-hold-time 1800
neighbor-recovery power-hold-time 0
no neighbor-recovery dynamic-sampling
neighbor-recovery dynamic-sampling threshold 5
neighbor-recovery dynamic-sampling retries 3
VC#show smart-rf interfering-neighbors
----------------------------------------------------------------------------------------------------
RADIO RADIO-MAC CHNL NEIGHBORS MAC POWER ATTN CHNL
----------------------------------------------------------------------------------------------------
ap7532-XXXXXX:R2 B8-50-01-XX-XX-XX --None--

ap7532-XXXXXX:R1 B8-50-01-XX-XX-XX 1 VC:R1 B8-50-01-XX-XX-XX 4 30 1

VC:R2 B8-50-01-XX-XX-XX --None--

VC:R1 B8-50-01-XX-XX-XX 1 ap7532-XXXXXX:R1 B8-50-01-XX-XX-XX 4 33 1

----------------------------------------------------------------------------------------------------



I need help

Thanks,

Aviv

Hello Aviv,

Select Shutdown feature is aimed at large deployment to reduce CCI on 2.4GHz. For a smaller deployment, less than 4, Select Shutdown will not consider any of the radios for hiding. The reason for this is, Interference Recovery will handle assigning channels 1, 6 and 11 among the three or less 2.4GHz radios.

In your case, Select Shutdown finds there are only 2 radios in the deployment, so it does not consider any radio for hiding.

Abdulla
Userlevel 2
Hello Abdulla Hammad,

OK, but I configured only one channel "1" for using by smart-rf policy !
You mean this criteria that Interference Recovery will handle assigning channels 1, 6 and 11 among the three I can't change/reconfig in smart-rf policy ???

In addition, you can see there is a very huge CCI (attenuation between them) about -30 !!!!!

By me, it's very strange.
I missing something here.

Regards,

Aviv
It is assumed that you wouldn't give all radios the same channel in actual deployment. If you are doing this to test the feature, please have more than 3 radios in the setup. You can set them to channel 1 and you will see Select Shutdown hiding them as needed.

Abdulla
Userlevel 2
Hello Abdulla Hammad,

I'll test it and update you.

Thanks,

Aviv
Userlevel 2
Hello,

Just tested it and select-shutdown is working.

What is the goal of using radio resource measurement ?

Thanks,

Aviv
Userlevel 7
Aviv Kedem wrote:

Hello,

Just tested it and select-shutdown is working.

What is the goal of using radio resource measurement ?

Thanks,

Aviv

Chrome knows everything.... https://en.m.wikipedia.org/wiki/IEEE_802.11k-2008
Aviv Kedem wrote:

Hello,

Just tested it and select-shutdown is working.

What is the goal of using radio resource measurement ?

Thanks,

Aviv

Great! Let me know if you have any questions regarding Select Shutdown in the future.
Userlevel 3
Aviv Kedem wrote:

Hello,

Just tested it and select-shutdown is working.

What is the goal of using radio resource measurement ?

Thanks,

Aviv

@Abdulla Hammad - fantastic answers, many thanks for the knowledge! :-))

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