How to Verify Spatial Stream Settings on CW9166 from AP CLI

[madhurimuppalla]

Hi

We are using a CW9166 Access Point managed by a C9800-CL Wireless LAN Controller (vWLC) running image C9800-CL-universalk9.17.15.*

Through the vWLC GUI, under
Configuration > Radio Configuration > High Throughput,
we reduced the number of spatial streams from 4SS to 2SS on all radios (2.4GHz, 5GHz, and 6GHz).

We verified the changes from the WLC CLI using:

show ap config slots
And for client-side verification:
show wireless client mac-address <MAC> summary
These commands confirm the MCS and spatial stream settings at the WLC level.

Is there a CLI command on the AP itself (CW9166) that can be used to verify:

• The currently supported or active spatial streams per radio?

• The number of spatial streams in use by each connected client?

Looking for AP-level CLI verification to ensure the configuration has been applied as expected.

[Mark Elsen]

  - Ref : https://www.cisco.com/c/en/us/products/collateral/wireless/catalyst-9164-series-access-points/catalyst-9166i-9164i-dg.html
            Have a look at Figure 39.

  M.

[madhurimuppalla]

Hi @Mark Elsen 

We have configured the vWLC controller as shown in Figure 39, as you referenced.

Is there a CLI command available on the CW9166 AP itself that can be used to verify the following:

• The currently supported or active spatial streams per radio?

• The number of spatial streams in use by each connected client?

We’re looking for AP-level CLI verification to ensure the configuration has been applied as expected.

[Saikat Nandy]

Does this help?

AP# sh controllers dot11Radio 1 client 22:3F:55:80:0A:4D
        mac                 radio vap aid  state       encr            Maxrate     Assoc  Cap   is_wgb_wired      wgb_mac_addr
22:3F:55:80:0A:4D     1     0    6   FWD  AES_CCM128 MCS112SS    HE     HE        false              00:00:00:00:00:00
Configured rates for client 22:3F:55:80:0A:4D
Legacy Rates(Mbps): 12 18 24 36 48 54
HT Rates(MCS):M0 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 M12 M13 M14 M15
VHT Rates: 1SS:M0-9 2SS:M0-9
HE Rates: 1SS:M0-11 2SS:M0-11
HT:yes     VHT:yes     HE:yes     40MHz:no     80MHz:no     80+80MHz:no     160MHz:no     
11w:yes     MFP:no     11h:yes     session_timeout: 23195     encrypt_policy: 4
_wmm_enabled:yes     qos_capable:yes     WME(11e):no     WMM_MIXED_MODE:no     
short_preamble:no     short_slot_time:no     short_hdr:no     SM_dyn:yes     
short_GI_20M:yes     short_GI_40M:yes     short_GI_80M:yes     LDPC:yes     AMSDU:yes     AMSDU_long:no     
su_mimo_capable:yes     mu_mimo_capable:no     is_wgb_wired:no     is_wgb:no     
HE_DL-MIMO:yes     HE_UL-MIMO:no     HE_DL-OFDMA:yes     HE_UL-OFDMA:yes     HE_TWT_CAPABLE:no

or

AP# show dot11 clients
Total dot11 clients: 2
       Client MAC        Slot ID  WLAN ID    AID       WLAN Name   RSSI     Maxrate       is_wgb_wired
22:3F:55:80:0A:4D       1           1            6                Test          -60    MCS112SS           No

[madhurimuppalla]

Hi @Saikat Nandy 
The commands shown display the maximum supported spatial streams for the client .However, this does not explicitly showing the currently active or negotiated spatial streams in use.
Is their any Access Point CLI command to read the number of spatial streams in use by each connected client?

[Mark Elsen]

  -  Ref : https://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/212892-802-11ac-wireless-throughput-testing-and.html
             You may also find this command useful from the controller's perspective :
                       WLC# show wireless client mac-address 72e6.81a1.XXXX detail | inc Current Rate

  M.