Re: hostapd + 100 devices on Cubieboard

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Dnia czwartek, 4 maja 2017 15:11:35 CEST Bruno Antunes pisze:
> Hi,
> > 
> > Can You recommend a different wifi device ?
> 
> Honestly nothing USB based...

Hi,

Maybe some other device not USB based.

I have seen this limit 2007 devices for AP somewhere else in documentation, my 
config now has max_num_sta=255

I have also switched from "g" mode to "b" and it seems that this is working 
more stable.
I have also set ctrl_interface so I can see STA being disconnected and 
connected. For now it works fine with 70 devices.

I need this to work in buses, where every seat has a device build into it and 
it is communicating with server. So bus has around 80 seats.
If I will have to I can add two physical AP's but it would be good to control 
these from one server.

Best Regards
Marek

> 
> > From iw list, I can't tell how many devices will this support, below there
> > is full output from iw list, can You make out something from this ?
> 
> Sorry my mistake, I was thinking on the number of interfaces a given
> device can generate.
> That would be what this command outputs.
> 
> From the hostapd.conf
> 
> https://w1.fi/cgit/hostap/plain/hostapd/hostapd.conf
> 
> # Maximum number of stations allowed in station table. New stations will be
> # rejected after the station table is full. IEEE 802.11 has a limit of 2007
> # different association IDs, so this number should not be larger than that.
> # (default: 2007)
> max_num_sta=255
> 
> So if you didn't configured this value you should be able to connect 2007
> Sta.
> 
> As far as my understanding if you can connect 60 devices its more than
> enough. Comercial APs have limits around that.
> 
> Troubleshoot the dhcp server and increase the hostapd log (with -d option).
> Its hard can give you an answer with so little info.
> 
> Regards,
> Bruno
> 
> > Best Regards
> > Marek
> > 
> > Wiphy phy0
> > 
> >         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 RSN-IBSS.
> >         
> >         Supported Ciphers:
> >                 * WEP40 (00-0f-ac:1)
> >                 * WEP104 (00-0f-ac:5)
> >                 * TKIP (00-0f-ac:2)
> >                 * CCMP (00-0f-ac:4)
> >                 * 00-0f-ac:10
> >                 * GCMP (00-0f-ac:8)
> >                 * 00-0f-ac:9
> >         
> >         Available Antennas: TX 0 RX 0
> >         
> >         Supported interface modes:
> >                  * IBSS
> >                  * managed
> >                  * AP
> >                  * AP/VLAN
> >                  * WDS
> >                  * monitor
> >                  * mesh point
> >         
> >         Band 1:
> >                 Capabilities: 0x172
> >                 
> >                         HT20/HT40
> >                         Static SM Power Save
> >                         RX Greenfield
> >                         RX HT20 SGI
> >                         RX HT40 SGI
> >                         RX STBC 1-stream
> >                         Max AMSDU length: 3839 bytes
> >                         No DSSS/CCK HT40
> >                 
> >                 Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
> >                 Minimum RX AMPDU time spacing: 2 usec (0x04)
> >                 HT RX MCS rate indexes supported: 0-7, 32
> >                 TX unequal modulation not supported
> >                 HT TX Max spatial streams: 1
> >                 HT TX MCS rate indexes supported may differ
> >                 
> >                 Bitrates (non-HT):
> >                         * 1.0 Mbps
> >                         * 2.0 Mbps (short preamble supported)
> >                         * 5.5 Mbps (short preamble supported)
> >                         * 11.0 Mbps (short preamble supported)
> >                         * 6.0 Mbps
> >                         * 9.0 Mbps
> >                         * 12.0 Mbps
> >                         * 18.0 Mbps
> >                         * 24.0 Mbps
> >                         * 36.0 Mbps
> >                         * 48.0 Mbps
> >                         * 54.0 Mbps
> >                 
> >                 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) (no IR)
> >                         * 2472 MHz [13] (20.0 dBm) (no IR)
> >                         * 2484 MHz [14] (20.0 dBm) (no IR)
> >         
> >         Supported commands:
> >                  * new_interface
> >                  * set_interface
> >                  * new_key
> >                  * start_ap
> >                  * new_station
> >                  * new_mpath
> >                  * set_mesh_config
> >                  * set_bss
> >                  * authenticate
> >                  * associate
> >                  * deauthenticate
> >                  * disassociate
> >                  * join_ibss
> >                  * join_mesh
> >                  * set_tx_bitrate_mask
> >                  * frame
> >                  * frame_wait_cancel
> >                  * set_wiphy_netns
> >                  * set_channel
> >                  * set_wds_peer
> >                  * probe_client
> >                  * set_noack_map
> >                  * register_beacons
> >                  * start_p2p_device
> >                  * set_mcast_rate
> >                  * Unknown command (104)
> >                  * connect
> >                  * disconnect
> >         
> >         Supported TX frame types:
> >                  * IBSS: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90
> > 
> > 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> > 
> >                  * managed: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80
> >                  0x90
> > 
> > 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> > 
> >                  * AP: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90
> >                  0xa0
> > 
> > 0xb0 0xc0 0xd0 0xe0 0xf0
> > 
> >                  * AP/VLAN: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80
> >                  0x90
> > 
> > 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> > 
> >                  * mesh point: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70
> >                  0x80
> > 
> > 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> > 
> >                  * P2P-client: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70
> >                  0x80
> > 
> > 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> > 
> >                  * P2P-GO: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80
> >                  0x90
> > 
> > 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> > 
> >                  * P2P-device: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70
> >                  0x80
> > 
> > 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> > 
> >         Supported RX frame types:
> >                  * IBSS: 0x40 0xb0 0xc0 0xd0
> >                  * managed: 0x40 0xd0
> >                  * AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
> >                  * AP/VLAN: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
> >                  * mesh point: 0xb0 0xc0 0xd0
> >                  * P2P-client: 0x40 0xd0
> >                  * P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
> >                  * P2P-device: 0x40 0xd0
> >         
> >         software interface modes (can always be added):
> >                  * AP/VLAN
> >                  * monitor
> >         
> >         valid interface combinations:
> >                  * #{ AP, mesh point } <= 8,
> >                  
> >                    total <= 8, #channels <= 1
> >         
> >         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
> >         
> >         Device supports TX status socket option.
> >         Device supports HT-IBSS.
> >         Device supports SAE with AUTHENTICATE command
> >         Device supports low priority scan.
> >         Device supports scan flush.
> >         Device supports AP scan.
> >         Device supports per-vif TX power setting
> >         Driver supports full state transitions for AP/GO clients
> >         Driver supports a userspace MPM
> >> > 
> >> > looked like 60 devices has connected to hostapd, but there were some
> >> > problems with dhcp server.
> >> 
> >> There is no limitation on the number of devices connected in hostapd,
> >> that is device dependent.
> >> If the problem isn't on the dhcp server you can check the number of
> >> max devices with:
> >> 
> >> iw list | grep managed
> >> 
> >> 
> >> Regards,
> >> Bruno
> >> 
> >> > Need some help, please.
> >> > 
> >> > Best Regards
> >> > Marek
> >> > 
> >> > _______________________________________________
> >> > Hostap mailing list
> >> > Hostap@xxxxxxxxxxxxxxxxxxx
> >> > http://lists.infradead.org/mailman/listinfo/hostap



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