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I just moved into my office and am having trouble connecting to the campus wifi from within the office. It works just fine in other locations on campus with both the 5GHz and 2.4GHz bands. I'm using wpa_auto from the AUR. Whenever I fail to connect "iwlist" only reports a fraction of the actually available networks. I've tried using regdom to make sure all channels are available and iwlist confirms that they are indeed activated. Yesterday after an hour of tinkering suddely the networks showed up in "iwlist" and I could connect with the wpa_auto daemon, but I have no idea why. Today morning I can't find them anymore and wpa_auto (or wpa_supplicant) fails to connect again. The signal is even good enough for my Android device, which I'm tethering off right now.
My wireless chipset is:
[root@edge lulu]# lspci | grep Adv
03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 (rev 34)
I'm using the iwlwifi drivers:
[root@edge lulu]# lsmod | grep iw
iwlwifi 304490 0
mac80211 416391 1 iwlwifi
cfg80211 173210 2 iwlwifi,mac80211
Scanning with "iwlist" shows:
[root@edge lulu]# iwlist wlan0 scan
wlan0 Scan completed :
Cell 01 - Address: 00:07:0E:B4:3B:BF
Channel:9
Frequency:2.452 GHz (Channel 9)
Quality=52/70 Signal level=-58 dBm
Encryption key:on
ESSID:"phys4501"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
Mode:Master
Extra:tsf=000008e3561043fe
Extra: Last beacon: 2680ms ago
IE: Unknown: 00087068797334353031
IE: Unknown: 010482848B96
IE: Unknown: 030109
IE: Unknown: 851E000086001F00FF0319007733353435303100000000000000000000000006
IE: Unknown: 9606004096000700
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (1) : TKIP
Authentication Suites (1) : PSK
IE: Unknown: DD06004096010100
IE: Unknown: DD050040960304
IE: Unknown: DD1600409604000107A5000023A500004254000062430000
IE: Unknown: DD050040960B01
IE: Unknown: DD180050F2020101810003A5000027A500004254BC0062436600
Cell 02 - Address: 00:23:EB:0A:C0:BE
Channel:44
Frequency:5.22 GHz (Channel 44)
Quality=31/70 Signal level=-79 dBm
Encryption key:on
ESSID:"Universities WiFi"
But when using "iw" it discovers many other networks (notably the one I'm trying to connect to: "sMobileNet").
[root@edge lulu]# iw wlan0 scan
BSS 00:07:0e:b4:3b:bf (on wlan0)
TSF: 9772576666034 usec (113d, 02:36:16)
freq: 2452
beacon interval: 100
capability: ESS Privacy ShortPreamble APSD (0x0831)
signal: -57.00 dBm
last seen: 2700 ms ago
Information elements from Probe Response frame:
SSID: phys4501
Supported rates: 1.0* 2.0* 5.5* 11.0*
DS Parameter set: channel 9
WPA: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: TKIP
* Authentication suites: PSK
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
WMM: * Parameter version 1
* u-APSD
* BE: CW 31-1023, AIFSN 3
* BK: CW 31-1023, AIFSN 7
* VI: CW 15-31, AIFSN 2, TXOP 6016 usec
* VO: CW 7-15, AIFSN 2, TXOP 3264 usec
BSS 00:23:eb:0a:c0:be (on wlan0)
TSF: 4707555127332 usec (54d, 11:39:15)
freq: 5220
beacon interval: 102
capability: ESS Privacy (0x0011)
signal: -78.00 dBm
last seen: 5653 ms ago
SSID: Universities WiFi
Supported rates:
TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
WPA: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: TKIP
* Authentication suites: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:23:eb:0a:c0:bf (on wlan0)
TSF: 4707558623737 usec (54d, 11:39:18)
freq: 5240
beacon interval: 102
capability: ESS Privacy (0x0011)
signal: -78.00 dBm
last seen: 2203 ms ago
Information elements from Probe Response frame:
SSID: sMobileNet
Supported rates:
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
WPA: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: TKIP
* Authentication suites: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:23:eb:0a:c0:be (on wlan0)
TSF: 4707558575104 usec (54d, 11:39:18)
freq: 5240
beacon interval: 102
capability: ESS Privacy (0x0011)
signal: -77.00 dBm
last seen: 2203 ms ago
Information elements from Probe Response frame:
SSID: Universities WiFi
Supported rates:
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
WPA: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: TKIP
* Authentication suites: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:25:84:ff:4f:ff (on wlan0)
TSF: 4707987229563 usec (54d, 11:46:27)
freq: 5805
beacon interval: 102
capability: ESS Privacy (0x0011)
signal: -64.00 dBm
last seen: 136 ms ago
Information elements from Probe Response frame:
SSID: sMobileNet
Supported rates: 18.0* 24.0 36.0 48.0 54.0
Country: HK Environment: Indoor/Outdoor
Channels [36 - 48] @ 17 dBm
Channels [52 - 64] @ 17 dBm
Channels [149 - 165] @ 30 dBm
HT capabilities:
Capabilities: 0x186e
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
No RX STBC
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
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
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
HT operation:
* primary channel: 161
* secondary channel offset: below
* STA channel width: any
* RIFS: 1
* HT protection: 20 MHz
* non-GF present: 1
* OBSS non-GF present: 0
* 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: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:25:84:22:fb:be (on wlan0)
TSF: 4368456395805 usec (50d, 13:27:36)
freq: 5180
beacon interval: 102
capability: ESS Privacy (0x0011)
signal: -79.00 dBm
last seen: 2410 ms ago
Information elements from Probe Response frame:
SSID: sMobileNet
Supported rates: 18.0* 24.0 36.0 48.0 54.0
Country: HK Environment: Indoor/Outdoor
Channels [36 - 48] @ 17 dBm
Channels [52 - 64] @ 17 dBm
Channels [149 - 165] @ 30 dBm
HT capabilities:
Capabilities: 0x186e
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
No RX STBC
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
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
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
HT operation:
* primary channel: 36
* secondary channel offset: above
* STA channel width: any
* RIFS: 1
* HT protection: no
* non-GF present: 1
* OBSS non-GF present: 0
* 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: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:25:84:22:fb:bf (on wlan0)
TSF: 4368456340057 usec (50d, 13:27:36)
freq: 5180
beacon interval: 102
capability: ESS Privacy (0x0011)
signal: -78.00 dBm
last seen: 2410 ms ago
Information elements from Probe Response frame:
SSID: Universities WiFi
Supported rates: 18.0* 24.0 36.0 48.0 54.0
Country: HK Environment: Indoor/Outdoor
Channels [36 - 48] @ 17 dBm
Channels [52 - 64] @ 17 dBm
Channels [149 - 165] @ 30 dBm
HT capabilities:
Capabilities: 0x186e
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
No RX STBC
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
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
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
HT operation:
* primary channel: 36
* secondary channel offset: above
* STA channel width: any
* RIFS: 1
* HT protection: no
* non-GF present: 1
* OBSS non-GF present: 0
* 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: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:23:eb:0a:c2:ce (on wlan0)
TSF: 4707556798493 usec (54d, 11:39:16)
freq: 5745
beacon interval: 102
capability: ESS Privacy (0x0011)
signal: -80.00 dBm
last seen: 3873 ms ago
Information elements from Probe Response frame:
SSID: Universities WiFi
Supported rates: 18.0* 24.0 36.0 48.0 54.0
Country: HK Environment: Indoor/Outdoor
Channels [36 - 48] @ 17 dBm
Channels [52 - 64] @ 17 dBm
Channels [149 - 165] @ 30 dBm
HT capabilities:
Capabilities: 0x186e
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
No RX STBC
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
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
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
HT operation:
* primary channel: 149
* secondary channel offset: above
* STA channel width: any
* RIFS: 1
* HT protection: 20 MHz
* non-GF present: 1
* OBSS non-GF present: 0
* 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: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:23:eb:0a:f6:df (on wlan0)
TSF: 5311092123676 usec (61d, 11:18:12)
freq: 5320
beacon interval: 102
capability: ESS Privacy (0x0011)
signal: -84.00 dBm
last seen: 1810 ms ago
SSID: sMobileNet
Supported rates: 18.0* 24.0 36.0 48.0 54.0
TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
Country: HK Environment: Indoor/Outdoor
Channels [36 - 48] @ 17 dBm
Channels [52 - 64] @ 17 dBm
Channels [149 - 165] @ 30 dBm
HT capabilities:
Capabilities: 0x186e
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
No RX STBC
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
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
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
HT operation:
* primary channel: 64
* secondary channel offset: below
* STA channel width: any
* RIFS: 1
* HT protection: no
* non-GF present: 1
* OBSS non-GF present: 0
* 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: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:23:eb:0a:cd:40 (on wlan0)
TSF: 4707548547624 usec (54d, 11:39:08)
freq: 2437
beacon interval: 102
capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
signal: -80.00 dBm
last seen: 6183 ms ago
SSID: sMobileNet
Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0
DS Parameter set: channel 6
TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
Country: HK Environment: Indoor/Outdoor
Channels [1 - 11] @ 30 dBm
ERP: Use_Protection
HT capabilities:
Capabilities: 0x182c
HT20
SM Power Save disabled
RX HT20 SGI
No RX STBC
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
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
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
HT operation:
* primary channel: 6
* secondary channel offset: no secondary
* STA channel width: 20 MHz
* RIFS: 0
* HT protection: nonmember
* non-GF present: 1
* OBSS non-GF present: 0
* 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: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:26:66:fc:9b:e0 (on wlan0)
TSF: 78475366783 usec (0d, 21:47:55)
freq: 2462
beacon interval: 100
capability: ESS Privacy ShortSlotTime (0x0411)
signal: -87.00 dBm
last seen: 29690 ms ago
SSID: KJM
Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 9.0 12.0 18.0
DS Parameter set: channel 11
TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
ERP: Barker_Preamble_Mode
Extended supported rates: 24.0 36.0 48.0 54.0
HT capabilities:
Capabilities: 0x106e
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
No RX STBC
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 32767 bytes (exponent: 0x002)
Minimum RX AMPDU time spacing: 16 usec (0x07)
HT RX MCS rate indexes supported: 0-15
HT TX MCS rate indexes are undefined
HT operation:
* primary channel: 11
* secondary channel offset: below
* STA channel width: any
* RIFS: 0
* HT protection: no
* non-GF present: 0
* OBSS non-GF present: 0
* 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: CCMP
* Pairwise ciphers: CCMP
* Authentication suites: PSK
WMM: * Parameter version 1
* u-APSD
* 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
WPS: * Version: 1.0
* Wi-Fi Protected Setup State: 2 (Configured)
BSS 00:25:84:22:fb:b1 (on wlan0)
TSF: 4368453206232 usec (50d, 13:27:33)
freq: 2462
beacon interval: 102
capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
signal: -67.00 dBm
last seen: 6100 ms ago
SSID: sMobileNet
Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0
DS Parameter set: channel 11
TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
Country: HK Environment: Indoor/Outdoor
Channels [1 - 11] @ 30 dBm
ERP: <no flags>
HT capabilities:
Capabilities: 0x182c
HT20
SM Power Save disabled
RX HT20 SGI
No RX STBC
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
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
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
HT operation:
* primary channel: 11
* secondary channel offset: no secondary
* STA channel width: 20 MHz
* RIFS: 1
* HT protection: no
* non-GF present: 1
* OBSS non-GF present: 0
* 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: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:23:eb:0a:c2:c0 (on wlan0)
TSF: 4707555127513 usec (54d, 11:39:15)
freq: 2462
beacon interval: 102
capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
signal: -64.00 dBm
last seen: 6090 ms ago
SSID: sMobileNet
Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0
DS Parameter set: channel 11
TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0 (+ 3 octets)
Country: HK Environment: Indoor/Outdoor
Channels [1 - 11] @ 30 dBm
ERP: <no flags>
HT capabilities:
Capabilities: 0x182c
HT20
SM Power Save disabled
RX HT20 SGI
No RX STBC
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
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
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
HT operation:
* primary channel: 11
* secondary channel offset: no secondary
* STA channel width: 20 MHz
* RIFS: 0
* HT protection: non-HT mixed
* non-GF present: 1
* OBSS non-GF present: 0
* 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: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:23:eb:0a:c0:b1 (on wlan0)
TSF: 4707555127512 usec (54d, 11:39:15)
freq: 2412
beacon interval: 102
capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
signal: -73.00 dBm
last seen: 6256 ms ago
SSID: Universities WiFi
Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0
DS Parameter set: channel 1
TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0 (+ 3 octets)
Country: HK Environment: Indoor/Outdoor
Channels [1 - 11] @ 30 dBm
ERP: Use_Protection
HT capabilities:
Capabilities: 0x182c
HT20
SM Power Save disabled
RX HT20 SGI
No RX STBC
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
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
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
HT operation:
* primary channel: 1
* secondary channel offset: no secondary
* STA channel width: 20 MHz
* RIFS: 0
* HT protection: nonmember
* non-GF present: 1
* OBSS non-GF present: 0
* 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: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:23:eb:0a:b4:f1 (on wlan0)
TSF: 4707564632281 usec (54d, 11:39:24)
freq: 2462
beacon interval: 102
capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
signal: -79.00 dBm
last seen: 6083 ms ago
SSID: Universities WiFi
Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0
DS Parameter set: channel 11
TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0 (+ 3 octets)
Country: HK Environment: Indoor/Outdoor
Channels [1 - 11] @ 30 dBm
ERP: Use_Protection
HT capabilities:
Capabilities: 0x182c
HT20
SM Power Save disabled
RX HT20 SGI
No RX STBC
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
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
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
HT operation:
* primary channel: 11
* secondary channel offset: no secondary
* STA channel width: 20 MHz
* RIFS: 0
* HT protection: nonmember
* non-GF present: 1
* OBSS non-GF present: 0
* 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: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:23:eb:0a:f6:d0 (on wlan0)
TSF: 5311088259289 usec (61d, 11:18:08)
freq: 2412
beacon interval: 102
capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
signal: -79.00 dBm
last seen: 6273 ms ago
SSID: sMobileNet
Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0
DS Parameter set: channel 1
TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
Country: HK Environment: Indoor/Outdoor
Channels [1 - 11] @ 30 dBm
ERP: <no flags>
HT capabilities:
Capabilities: 0x182c
HT20
SM Power Save disabled
RX HT20 SGI
No RX STBC
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
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
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
HT operation:
* primary channel: 1
* secondary channel offset: no secondary
* STA channel width: 20 MHz
* RIFS: 1
* HT protection: no
* non-GF present: 1
* OBSS non-GF present: 0
* 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: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:25:84:ff:4f:f0 (on wlan0)
TSF: 4707981797593 usec (54d, 11:46:21)
freq: 2437
beacon interval: 102
capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
signal: -54.00 dBm
last seen: 6173 ms ago
SSID: sMobileNet
Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0
DS Parameter set: channel 6
TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0 (+ 3 octets)
Country: HK Environment: Indoor/Outdoor
Channels [1 - 11] @ 30 dBm
ERP: <no flags>
HT capabilities:
Capabilities: 0x182c
HT20
SM Power Save disabled
RX HT20 SGI
No RX STBC
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
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
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
HT operation:
* primary channel: 6
* secondary channel offset: no secondary
* STA channel width: 20 MHz
* RIFS: 1
* HT protection: no
* non-GF present: 1
* OBSS non-GF present: 0
* 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: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:25:84:23:1b:f0 (on wlan0)
TSF: 4707554396377 usec (54d, 11:39:14)
freq: 2462
beacon interval: 102
capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
signal: -86.00 dBm
last seen: 29773 ms ago
SSID: sMobileNet
Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0
DS Parameter set: channel 11
TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
Country: HK Environment: Indoor/Outdoor
Channels [1 - 11] @ 30 dBm
ERP: <no flags>
HT capabilities:
Capabilities: 0x182c
HT20
SM Power Save disabled
RX HT20 SGI
No RX STBC
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
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
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
HT operation:
* primary channel: 11
* secondary channel offset: no secondary
* STA channel width: 20 MHz
* RIFS: 0
* HT protection: non-HT mixed
* non-GF present: 1
* OBSS non-GF present: 0
* 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: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:23:eb:0a:c0:bf (on wlan0)
TSF: 4707558574116 usec (54d, 11:39:18)
freq: 5220
beacon interval: 102
capability: ESS Privacy (0x0011)
signal: -75.00 dBm
last seen: 2253 ms ago
SSID: sMobileNet
Supported rates:
TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
WPA: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: TKIP
* Authentication suites: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:23:eb:0a:c2:cf (on wlan0)
TSF: 4707541131293 usec (54d, 11:39:01)
freq: 5745
beacon interval: 102
capability: ESS Privacy (0x0011)
signal: -80.00 dBm
last seen: 19590 ms ago
Information elements from Probe Response frame:
SSID: sMobileNet
Supported rates: 18.0* 24.0 36.0 48.0 54.0
Country: HK Environment: Indoor/Outdoor
Channels [36 - 48] @ 17 dBm
Channels [52 - 64] @ 17 dBm
Channels [149 - 165] @ 30 dBm
HT capabilities:
Capabilities: 0x186e
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
No RX STBC
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
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
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
HT operation:
* primary channel: 149
* secondary channel offset: above
* STA channel width: any
* RIFS: 1
* HT protection: 20 MHz
* non-GF present: 1
* OBSS non-GF present: 0
* 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: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
BSS 00:27:19:d6:f9:14 (on wlan0)
TSF: 5356189696428 usec (61d, 23:49:49)
freq: 2437
beacon interval: 100
capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
signal: -90.00 dBm
last seen: 14026 ms ago
SSID: Dante
Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 12.0 24.0 36.0
DS Parameter set: channel 6
TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
ERP: Use_Protection
Extended supported rates: 9.0 18.0 48.0 54.0
BSS 00:17:df:aa:c1:20 (on wlan0)
TSF: 25708204252 usec (0d, 07:08:28)
freq: 2427
beacon interval: 102
capability: ESS ShortPreamble ShortSlotTime (0x0421)
signal: -86.00 dBm
last seen: 2843 ms ago
SSID: \x00
Supported rates: 11.0* 12.0 18.0 24.0 36.0 48.0 54.0
DS Parameter set: channel 4
TIM: DTIM Count 0 DTIM Period 2 Bitmap Control 0x0 Bitmap[0] 0xc (+ 3 octets)
Country: HK Environment: Indoor only
Channels [1 - 11] @ 26 dBm
ERP: <no flags>
WMM: * Parameter version 1
* u-APSD
* BE: CW 31-1023, AIFSN 3
* BK: CW 31-1023, AIFSN 7
* VI: CW 15-31, AIFSN 2, TXOP 6016 usec
* VO: CW 7-15, AIFSN 2, TXOP 3264 usec
BSS 00:25:84:22:fb:b0 (on wlan0)
TSF: 4368456653067 usec (50d, 13:27:36)
freq: 2462
beacon interval: 102
capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
signal: -63.00 dBm
last seen: 2703 ms ago
SSID: Universities WiFi
Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0
DS Parameter set: channel 11
TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
Country: HK Environment: Indoor/Outdoor
Channels [1 - 11] @ 30 dBm
ERP: <no flags>
HT capabilities:
Capabilities: 0x182c
HT20
SM Power Save disabled
RX HT20 SGI
No RX STBC
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
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
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: CCMP
* Authentication suites: IEEE 802.1X
* Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
HT operation:
* primary channel: 11
* secondary channel offset: no secondary
* STA channel width: 20 MHz
* RIFS: 1
* HT protection: no
* non-GF present: 1
* OBSS non-GF present: 0
* 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: IEEE 802.1X
* Capabilities: (0x0000)
WMM: * Parameter version 1
* u-APSD
* 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
Half a minute of monitoring with airodump-ng shows this
BSSID PWR Beacons #Data, #/s CH MB ENC CIPHER AUTH ESSID
00:1F:CA:5D:60:00 -1 0 0 0 11 -1 <length: 0>
7E:51:E5:8B:D7:A0 -1 3 0 0 6 11 OPN hpsetup
00:07:0E:B4:3B:BF -54 75 0 0 9 11e. WPA TKIP PSK phys4501
00:00:00:00:00:00 -60 0 0 0 158 -1 <length: 0>
00:25:84:FF:4F:F0 -63 16 83 0 6 54e. WPA2 CCMP MGT sMobileNet
00:23:EB:0A:C2:C1 -66 15 0 0 11 54e. WPA2 CCMP MGT Universities WiFi
00:25:84:22:FB:B0 -67 16 0 0 11 54e. WPA2 CCMP MGT Universities WiFi
00:25:84:22:FB:B1 -67 17 342 0 11 54e. WPA2 CCMP MGT sMobileNet
00:23:EB:0A:C0:B0 -72 20 1 0 1 54e. WPA2 CCMP MGT sMobileNet
00:23:EB:0A:C0:B1 -71 20 0 0 1 54e. WPA2 CCMP MGT Universities WiFi
00:23:EB:0A:B4:F0 -81 12 1 0 11 54e. WPA2 CCMP MGT sMobileNet
00:23:EB:0A:CD:41 -81 13 1 0 6 54e. WPA2 CCMP MGT Universities WiFi
00:25:84:23:1B:F0 -81 9 0 0 11 54e. WPA2 CCMP MGT sMobileNet
00:25:84:23:1B:F1 -81 7 0 0 11 54e. WPA2 CCMP MGT Universities WiFi
00:23:EB:0A:CD:40 -81 13 0 0 6 54e. WPA2 CCMP MGT sMobileNet
00:23:EB:0A:B4:F1 -82 13 0 0 11 54e. WPA2 CCMP MGT Universities WiFi
00:17:DF:AA:C1:20 -83 3 0 0 4 54e. OPN <length: 1>
00:17:DF:AA:C1:21 -83 3 0 0 4 54e. WPA2 CCMP MGT eduroam
00:26:66:FC:9B:E0 -84 15 0 0 11 54e WPA CCMP PSK KJM
00:25:84:23:1A:20 -84 7 0 0 6 54e. WPA2 CCMP MGT sMobileNet
00:17:DF:AA:C1:22 -84 4 1 0 4 54e. WPA2 CCMP MGT sMobileNet
00:25:84:22:FB:40 -85 2 0 0 6 54e. WPA2 CCMP MGT sMobileNet
00:23:EB:0B:4F:60 -86 1 1 0 6 54e. WPA2 CCMP MGT sMobileNet
00:23:EB:3A:83:50 -87 0 8 0 158 -1 OPN <length: 0>
00:25:84:23:1A:80 -87 1 4 0 1 54e. WPA2 CCMP MGT sMobileNet
00:23:EB:3A:2E:20 -87 0 2 0 158 -1 WPA <length: 0>
00:27:19:D6:F9:14 -90 3 0 0 6 54 . WEP WEP Dante
00:23:EB:0A:C2:C0 -91 16 5 1 11 54e. WPA2 CCMP MGT sMobileNet
00:23:EB:0A:F6:D0 -86 21 211 0 1 54e. WPA2 CCMP MGT sMobileNet
Any help or suggestions on what to try would be greatly appreciated.
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I'm having similar connection issues on my X230 with the Intel Ultimate-N 6300 at my university. Could I ask you for your kernel version (output of uname -r)? I couldn't get it working on Arch or even Ubuntu. I think it's a bug in the iwlwifi driver. Bugzilla time?
Last edited by earsplit (2012-09-13 04:41:14)
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Kernel version is: 3.5.3-1
On another note, today iwlist still finds only a fraction of the APs in the area but this time the one with the strongest signal is among them and I can connect without any issues.
edit:
I have no idea whether or not this is a bug or if "iwlist scan" is omitting some networks for some good reason. If it was a driver issue shouldn't "iw scan" also fail to find the networks in my case?
Last edited by sveitser (2012-09-13 06:22:54)
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I'm having similar issues on my X220 with a 6300 card. I'm not having the same issue on my T410 with a 6200 card. In my case though not only does it not find the networks all the time when it does find them it has a real flaky connection that comes and goes.
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Relevant post from the same iwlwifi driver issue in Ubuntu. Check here in case it gets solved.
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The following seems to help whenever the scanning fails to find what it's supposed to find. I reload the iwlwifi module and turn the interface off and on again. Then I'm almost immediately connected. In summary, here's what I do:
rmmod iwlwifi
modprobe iwlwifi
ifconfig wlan0 down
ifconfig wlan0 up
Restarting wpa_auto instead of doing ifconfig down/up seems to make the problem reappear in my case o_O.
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I've recently switched to netcfg on arch and this issue has been solved for me. Assuming your wireless is PEAP/MACHV2, try the following netcfg profile:
CONNECTION='wireless'
INTERFACE=wlan0 # you may need to change this
SECURITY='wpa-configsection'
IP='dhcp'
CONFIGSECTION='
ssid="NETWORKNAME"
key_mgmt=WPA-EAP
eap=PEAP MSCHAPV2
group=CCMP
pairwise=CCMP
identity="YOURUSERNAME"
password="YOURPASSWORD"
priority=1
phase1="peapver=0"
phase2="MSCHAPV2"'
This allows me to connect immediately at 10MB/s on my campus wifi. Happy happy me!
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I have also been using netcfg on Arch with my X220 and the Intel 6205. Haven't noticed any connection problems in Arch (or Fedora or Mageia). Most of my connection problems are in Windows 7!
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