Temat: Openwrt - wybór optymalnego kanału wifi
Witam,
Są dwa urządzenia połączone ze sobą po wifi:
1. ZyXEL NBG6716 z luci-15.05-ar71xx-nand pracujący w trybie AP. Teoretyczne parametry AC1750
2. TP-Link RE450 na oryginalnym sofcie pracujący w trybie "Client" Range Extender - coś w rodzaju mostu. Teoretyczne parametry 450Mb/s w paśmie 2,4GHz + 1300Mb/s w paśmie 5GHz pozwalają uzyskać połączenia o łącznej prędkości do 1750Mb/s. Do TP-Link RE450 kablem UTP podpięty jest komputer PC.
Eter średnio zapchany jak na blokowisko:
2.4 GHz około 23 sieci
Channel: 1 | Mode: Master | BSSID: 00:71:C2:0B:DB:C0 | Encryption: WPA2 - PSK
Channel: 1 | Mode: Master | BSSID: 60:02:92:48:EB:47 | Encryption: WPA2 - PSK
Channel: 1 | Mode: Master | BSSID: B0:48:7A:9A:84:DA | Encryption: mixed WPA/WPA2 - PSK
Channel: 1 | Mode: Master | BSSID: BC:F6:85:42:16:A0 | Encryption: WPA2 - PSK
Channel: 1 | Mode: Master | BSSID: C0:4A:00:D3:BE:7A | Encryption: WPA2 - PSK
Channel: 1 | Mode: Master | BSSID: F8:D1:11:B8:1C:22 | Encryption: mixed WPA/WPA2 - PSK
Channel: 2 | Mode: Master | BSSID: 10:FE:ED:3F:DB:92 | Encryption: WPA2 - PSK
Channel: 4 | Mode: Master | BSSID: 30:B5:C2:0F:5B:54 | Encryption: WPA2 - PSK
Channel: 6 | Mode: Master | BSSID: 30:46:9A:60:FA:96 | Encryption: WPA2 - PSK
Channel: 6 | Mode: Master | BSSID: B0:48:7A:CF:61:5A | Encryption: mixed WPA/WPA2 - PSK
Channel: 6 | Mode: Master | BSSID: B0:48:7A:ED:AD:24 | Encryption: mixed WPA/WPA2 - PSK
Channel: 6 | Mode: Master | BSSID: C8:3A:35:17:EA:18 | Encryption: otwarte
Channel: 7 | Mode: Master | BSSID: 54:E6:FC:D9:63:A2 | Encryption: mixed WPA/WPA2 - PSK
Channel: 8 | Mode: Master | BSSID: 00:04:0E:D0:59:AB | Encryption: WPA - PSK
Channel: 8 | Mode: Master | BSSID: 00:15:D6:20:13:80 | Encryption: otwarte
Channel: 8 | Mode: Master | BSSID: 64:70:02:CA:31:36 | Encryption: WPA2 - PSK
Channel: 8 | Mode: Master | BSSID: C4:6E:1F:66:17:30 | Encryption: WPA2 - PSK
Channel: 8 | Mode: Master | BSSID: E8:94:F6:FD:FE:2C | Encryption: WPA2 - PSK
Channel: 10 | Mode: Master | BSSID: 60:A4:4C:6B:69:C0 | Encryption: WPA2 - PSK
Channel: 11 | Mode: Master | BSSID: 10:FE:ED:DF:E4:4C | Encryption: mixed WPA/WPA2 - PSK
Channel: 11 | Mode: Master | BSSID: 30:B5:C2:5D:BD:2E | Encryption: mixed WPA/WPA2 - PSK
Channel: 11 | Mode: Master | BSSID: 80:1F:02:9F:83:36 | Encryption: WPA - PSK
Channel: 13 | Mode: Master | BSSID: 00:17:9A:5B:22:D7 | Encryption: WPA - PSK5GHz tylko 1 sieć na kanale 36 (plus druga moja)
3. Sądzę że najlepiej będzie połączyć te urządzenia w trybie N lub AC ?.
4. Zawsze Szybkość RX mam dużo większa niż Szybkość TX przykładowo:
Sygnał -75 dBm | Szum -103 dBm | Szybkość RX 162.0 Mbit/s, MCS 0, 40MHz | Szybkość TX 6.0 Mbit/s, MCS 0, 20MHz
5. iw list pokazuje
Wiphy phy1
max # scan SSIDs: 4
max scan IEs length: 2257 bytes
Retry short limit: 7
Retry long limit: 4
Coverage class: 0 (up to 0m)
Device supports AP-side u-APSD.
Device supports T-DLS.
Available Antennas: TX 0x7 RX 0x7
Configured Antennas: TX 0x7 RX 0x7
Supported interface modes:
* IBSS
* managed
* AP
* AP/VLAN
* WDS
* monitor
* mesh point
* P2P-client
* P2P-GO
Band 1:
Capabilities: 0x11ef
RX LDPC
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 8 usec (0x06)
HT TX/RX MCS rate indexes supported: 0-23
Frequencies:
* 2412 MHz [1] (20.0 dBm)
* 2417 MHz [2] (20.0 dBm)
* 2422 MHz [3] (20.0 dBm)
* 2427 MHz [4] (20.0 dBm)
* 2432 MHz [5] (20.0 dBm)
* 2437 MHz [6] (20.0 dBm)
* 2442 MHz [7] (20.0 dBm)
* 2447 MHz [8] (20.0 dBm)
* 2452 MHz [9] (20.0 dBm)
* 2457 MHz [10] (20.0 dBm)
* 2462 MHz [11] (20.0 dBm)
* 2467 MHz [12] (20.0 dBm)
* 2472 MHz [13] (20.0 dBm)
* 2484 MHz [14] (disabled)
valid interface combinations:
* #{ managed } <= 2048, #{ AP, mesh point } <= 8, #{ P2P-client, P2P-GO } <= 1, #{ IBSS } <= 1,
total <= 2048, #channels <= 1, STA/AP BI must match
* #{ WDS } <= 2048,
total <= 2048, #channels <= 1, STA/AP BI must match
* #{ IBSS, AP, mesh point } <= 1,
total <= 1, #channels <= 1, STA/AP BI must match, radar detect widths: { 20 MHz (no HT), 20 MHz, 40 MHz }
HT Capability overrides:
* MCS: ff ff ff ff ff ff ff ff ff ff
* maximum A-MSDU length
* supported channel width
* short GI for 40 MHz
* max A-MPDU length exponent
* min MPDU start spacing
Wiphy phy0
max # scan SSIDs: 16
max scan IEs length: 199 bytes
Retry short limit: 7
Retry long limit: 4
Coverage class: 0 (up to 0m)
Device supports AP-side u-APSD.
Available Antennas: TX 0x7 RX 0x7
Configured Antennas: TX 0x7 RX 0x7
Supported interface modes:
* managed
* AP
* AP/VLAN
* monitor
* P2P-client
* P2P-GO
* P2P-device
Band 2:
Capabilities: 0x19e3
RX LDPC
HT20/HT40
Static SM Power Save
RX HT20 SGI
RX HT40 SGI
TX STBC
RX STBC 1-stream
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 TX/RX MCS rate indexes supported: 0-23
VHT Capabilities (0x338001b2):
Max MPDU length: 11454
Supported Channel Width: neither 160 nor 80+80
RX LDPC
short GI (80 MHz)
TX STBC
RX antenna pattern consistency
TX antenna pattern consistency
VHT RX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: MCS 0-9
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT RX highest supported: 0 Mbps
VHT TX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: MCS 0-9
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT TX highest supported: 0 Mbps
Frequencies:
* 5180 MHz [36] (20.0 dBm)
* 5200 MHz [40] (20.0 dBm)
* 5220 MHz [44] (20.0 dBm)
* 5240 MHz [48] (20.0 dBm)
* 5260 MHz [52] (20.0 dBm) (radar detection)
DFS state: usable (for 3475 sec)
DFS CAC time: 60000 ms
* 5280 MHz [56] (20.0 dBm) (radar detection)
DFS state: usable (for 3475 sec)
DFS CAC time: 60000 ms
* 5300 MHz [60] (20.0 dBm) (radar detection)
DFS state: usable (for 3475 sec)
DFS CAC time: 60000 ms
* 5320 MHz [64] (20.0 dBm) (radar detection)
DFS state: usable (for 3475 sec)
DFS CAC time: 60000 ms
* 5500 MHz [100] (27.0 dBm) (radar detection)
DFS state: available (for 1149 sec)
DFS CAC time: 60000 ms
* 5520 MHz [104] (27.0 dBm) (radar detection)
DFS state: available (for 1149 sec)
DFS CAC time: 60000 ms
* 5540 MHz [108] (27.0 dBm) (radar detection)
DFS state: available (for 1149 sec)
DFS CAC time: 60000 ms
* 5560 MHz [112] (27.0 dBm) (radar detection)
DFS state: available (for 1149 sec)
DFS CAC time: 60000 ms
* 5580 MHz [116] (27.0 dBm) (radar detection)
DFS state: usable (for 3475 sec)
DFS CAC time: 60000 ms
* 5600 MHz [120] (27.0 dBm) (radar detection)
DFS state: usable (for 3475 sec)
DFS CAC time: 60000 ms
* 5620 MHz [124] (27.0 dBm) (radar detection)
DFS state: usable (for 3475 sec)
DFS CAC time: 60000 ms
* 5640 MHz [128] (27.0 dBm) (radar detection)
DFS state: usable (for 3475 sec)
DFS CAC time: 60000 ms
* 5660 MHz [132] (27.0 dBm) (radar detection)
DFS state: usable (for 3475 sec)
DFS CAC time: 60000 ms
* 5680 MHz [136] (27.0 dBm) (radar detection)
DFS state: usable (for 3475 sec)
DFS CAC time: 60000 ms
* 5700 MHz [140] (27.0 dBm) (radar detection)
DFS state: usable (for 3475 sec)
DFS CAC time: 60000 ms
* 5745 MHz [149] (disabled)
* 5765 MHz [153] (disabled)
* 5785 MHz [157] (disabled)
* 5805 MHz [161] (disabled)
* 5825 MHz [165] (disabled)
valid interface combinations:
* #{ AP } <= 8,
total <= 8, #channels <= 1, STA/AP BI must match, radar detect widths: { 20 MHz (no HT), 20 MHz, 40 MHz, 80 MHz }
HT Capability overrides:
* MCS: ff ff ff ff ff ff ff ff ff ff
* maximum A-MSDU length
* supported channel width
* short GI for 40 MHz
* max A-MPDU length exponent
* min MPDU start spacingNa 5 GHz powyżej kanału 52 jest komunikat (radar detection) DFS state: usable (for 3475 sec) DFS CAC time: 60000 ms, nie wiem co to oznacza ?
Rozumiem że mam wybierać kanały z największą wartością dBm ?
TP-Link TL-WDR4300 Mod, CPU 700MHz, Flash 16 MB, Gargoyle 1.5.11.4, extroot + dysk zewnętrzny Samsung (S2), kamerka MS LifeCam HD-5000
TP-Link TL-WR1043ND Mod, RAM 64 MB, chłodzenie pasywne, Gargoyle 1.5.10.14, extroot, kamerka Logitech HD Webcam C270
TP-Link TL-WR1043ND Mod, RAM 64 MB, chłodzenie pasywne, Gargoyle 1.5.10.14, extroot, kamerka Logitech HD Webcam C270
