Hi community.
After some investigation I have found that IOS-XE code 17.3.x reports 802.11ax devices with wrong spatial streams when these adapters are 2x2:2. In all cases the AP country code was setup to ES, and this is the country code shown in the beacons.
This is a packet dissection of an Intel AX200 wNIC showing that:
These are my findings after further investigation on this issue testing with different access points:
Intel AX200 association information to AP3700 as seen on C9800 CLI
In this case everything is fine and client device is shown with proper specs:
C9800#sh wireless client mac-address aabb.ccdd.eeff detail
Client MAC Address : aabb.ccdd.eeff
(...)
Protocol : 802.11ac
Channel : 36
(...)
Current Rate : m9 ss2
Supported Rates : 6.0,12.0,18.0,36.0,48.0,54.0
(...)
Max Client Protocol Capability: Wi-Fi6 (802.11ax)
Intel AX200 association information to AP3800 as seen on C9800 CLI
The spatial stream information is reported badly when looking the details of the client and returns 3 spatial streams capable device.
C9800#sh wireless client mac-address aabb.ccdd.eeff detail
Client MAC Address : aabb.ccdd.eeff
(...)
Protocol : 802.11ac
Channel : 136
(...)
Current Rate : m9 ss3
Supported Rates : 6.0,12.0,18.0,36.0,48.0,54.0
(...)
Max Client Protocol Capability: Wi-Fi6 (802.11ax)
Intel AX200 association information to AP3800 as seen on AP CLI
The spatial stream information is reported properly by the AP on the MAC status with 2SS, but not on the statistics field where the AP returns a 3SS capable device:
AP4800#show controllers dot11Radio 1 client AA:BB:CC:DD:EE:FF
mac radio vap aid state encr Maxrate Assoc Cap is_wgb_wired wgb_mac_addr
AA:BB:CC:DD:EE:FF 1 1 1 FWD AES_CCM128 MCS92SS VHT HE false 00:00:00:00:00:00
Configured rates for client AA:BB:CC:DD:EE:FF
Legacy Rates(Mbps): 6 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
(...)
Statistics for client AA:BB:CC:DD:EE:FF
mac intf TxData TxMgmt TxUC TxBytes TxFail TxDcrd TxCumRetries RxData RxMgmt RxBytes RxErr TxRt(Mbps) RxRt(Mbps) idle_counter stats_ago expiration
AA:BB:CC:DD:EE:FF apr1v1 1638 2 1638 367856 0 0 0 2053 1 430777 0 VHT-40,3SS,MCS9,SGI,BF(600) VHT-40,3SS,MCS9,SGI(600) 300 4.196000 53595
Intel AX200 association information to C9120 as seen on C9800 CLI
The spatial stream information is reported badly when looking the details of the client and returns 1 spatial stream only for the device.
C9800# sh wireless client mac-address aabb.ccdd.eeff detail
Client MAC Address : aabb.ccdd.eeff
(...)
Protocol : 802.11ax - 5 GHz
Channel : 40
(...)
Current Rate : m11 ss1
Supported Rates : 6.0,12.0,18.0,36.0,48.0,54.0
(...)
Max Client Protocol Capability: Wi-Fi6 (802.11ax)
Intel AX200 association information to C9120 as seen on AP CLI
The spatial stream information is reported properly by the AP on the MAC status with 2SS. This time there is no information about the spatial streams on the statistics field of the output:
C9120AP#show controllers dot11Radio 1 client AA:BB:CC:DD:EE:FF
mac radio vap aid state encr Maxrate Assoc Cap is_wgb_wired wgb_mac_addr
AA:BB:CC:DD:EE:FF 1 1 1 FWD AES_CCM128 MCS112SS HE HE false 00:00:00:00:00:00
Configured rates for client AA:BB:CC:DD:EE:FF
Legacy Rates(Mbps): 6 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
(...)
Statistics for client AA:BB:CC:DD:EE:FF
mac intf TxData TxMgmt TxUC TxBytes TxFail TxDcrd TxCumRetries RxData RxMgmt RxBytes RxErr TxRt(Mbps) RxRt(Mbps) idle_counter stats_ago expiration
AA:BB:CC:DD:EE:FF apr1v1 852 2 852 207750 0 0 47 1234 1 246437 0 42 43 290 10.582000 1280
(...)
Smartphone with Randomized MAC association information to C9120 as seen on C9800 CLI
The spatial stream information is reported badly when looking the details of the client and returns 1 spatial stream only for the device:
C9800#sh wireless client mac-address 36:F8:76:E0:19:DC details
Client MAC Address : 0011.2233.4455
(...)
Protocol : 802.11ax - 5 GHz
Channel : 64
(...)
Current Rate : m11 ss1
Supported Rates : 18.0,36.0,48.0,54.0
(...)
Max Client Protocol Capability: Wi-Fi6 (802.11ax)
Smartphone with Randomized MAC association information to C9120 as seen on AP CLI
The spatial stream information is reported properly by the AP on the MAC status with 2SS:
C9120AP#show controllers dot11Radio 1 client 00:11.22:33:44:55
mac radio vap aid state encr Maxrate Assoc Cap is_wgb_wired wgb_mac_addr
00:11.22:33:44:55 1 2 1 FWD AES_CCM128 MCS112SS HE HE false 00:00:00:00:00:00
Configured rates for client 00:11.22:33:44:55
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
(...)
Statistics for client AA:BB:CC:DD:EE:FF
mac intf TxData TxMgmt TxUC TxBytes TxFail TxDcrd TxCumRetries RxData RxMgmt RxBytes RxErr TxRt(Mbps) RxRt(Mbps) idle_counter stats_ago expiration
00:11.22:33:44:55 apr1v2 48 4 48 18613 111 111 666 27 2 3092 0 42 24 155 5.896000 53700
In parallel, AireOS 8.10 reports it properly.
Intel AX200 association information to AP3800 as Mobility Express Controller
In this case, the information reported by the controller matches client capability:
(CISCOME) >show client detail AA:BB:CC:DD:EE:FF
Client MAC Address............................... AA:BB:CC:DD:EE:FF
(...)
Channel.......................................... 136
(...)
Current Rate..................................... m9 ss2
Supported Rates.................................. 6.0,12.0,18.0,24.0,36.0,48.0,
............................................. 54.0
(...)
Client Capabilities:
Radio Capability........................... 802.11ax
HTH
-Jesus
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