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Linux/WL1807MOD: Iw dev wlan0 and

Part Number: WL1807MOD

Tool/software: Linux

My machine is connected to BCT router. Im seeing the mismatch in the data rates.  iw dev wlan0 link say supported is 65mbps and iw dev wlan0 scan say extended data rate is 54mbps. 

a. which data rate is correct?

b. When the data rate is higher than 54mbps, the cable change handling test case is getting failed for the home kit. The duplicate packet (probing packet send by the mac machine is not reaching the LCC) packet loss is happening 4/5 times. Any reason why if the data rate is 72.0mbps, the packet loss is happening?  This issue is not happening when the data rate 54.0mbps or less than that. (radio mode : 802.11a/n - 802.11b/g/n (Automatic)) 

root@lccd:~# wpa_cli -iwlan0 status
bssid=60:f4:45:e9:1d:24
freq=2437
ssid=BCT
id=2
mode=station
pairwise_cipher=CCMP
group_cipher=TKIP
key_mgmt=WPA2-PSK
wpa_state=COMPLETED
p2p_device_address=d0:b5:c2:bd:dd:8e
address=d0:b5:c2:bd:dd:8d
uuid=c4e5a7eb-45ed-5545-a888-484f63afde82

root@lccd:~# iw dev wlan0 scan | more
BSS 60:f4:45:e9:1d:24(on wlan0) -- associated
        TSF: 299189142 usec (0d, 00:04:59)
        freq: 2437
        beacon interval: 100 TUs
        capability: ESS Privacy ShortPreamble ShortSlotTime RadioMeasure (0x1431)
        signal: -59.00 dBm
        last seen: 5370 ms ago
        Information elements from Probe Response frame:
        SSID: BCT
        Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 9.0 12.0 18.0
        DS Parameter set: channel 6
        Country: IN     Environment: Indoor/Outdoor
                Channels [1 - 13] @ 30 dBm
        ERP: Use_Protection
        Extended supported rates: 24.0 36.0 48.0 54.0
        RSN:     * Version: 1
                 * Group cipher: TKIP
                 * Pairwise ciphers: CCMP TKIP
                 * Authentication suites: PSK
                 * Capabilities: 1-PTKSA-RC 1-GTKSA-RC (0x0000)
        HT capabilities:
                Capabilities: 0x51ad
                        RX LDPC
                        HT20
                        SM Power Save disabled
                        RX HT20 SGI
                        TX STBC
                        RX STBC 1-stream
                        Max AMSDU length: 3839 bytes
                        DSSS/CCK HT40
                        40 MHz Intolerant
                Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
                Minimum RX AMPDU time spacing: 8 usec (0x06)
                HT RX MCS rate indexes supported: 0-15
                HT TX MCS rate indexes are undefined
        HT operation:
                 * primary channel: 6
                 * secondary channel offset: no secondary
                 * STA channel width: 20 MHz
                 * RIFS: 0
                 * HT protection: nonmember
                 * non-GF present: 0
                 * OBSS non-GF present: 1
                 * dual beacon: 0
                 * dual CTS protection: 0
                 * STBC beacon: 0
                 * L-SIG TXOP Prot: 0
                 * PCO active: 0
                 * PCO phase: 0
        WPA:     * Version: 1
                 * Group cipher: TKIP
                 * Pairwise ciphers: TKIP
                 * Authentication suites: PSK
        WMM:     * Parameter version 1
                 * BE: CW 15-1023, AIFSN 3
                 * BK: CW 15-1023, AIFSN 7
                 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
                 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec

root@lccd:~# iw dev wlan0 link

Connected to 60:f4:45:e9:1d:24 (on wlan0)       

  SSID: BCT         freq: 2437         RX: 19863 bytes (77 packets)         TX: 13677 bytes (179 packets)        

signal: -60 dBm         tx bitrate: 65.0 MBit/s MCS 7

   bss flags:      CTS-protection short-preamble short-slot-time         dtim period:    3         beacon int:     100