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Old 03-14-2019, 03:12 AM   #1
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Registered: Nov 2013
Posts: 24

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Data not getting through to stations

I'm banging my head against the wall on this issue.
Data is not getting through to the stations. Stations are associating, passing 4-way handshake, sending DHCPDISCOVER to router, router responds with DHCPOFFER, I see the offer on wlp9s0 on router with wireshark, but stations doesn't receive it. Unfortunately I don't have wi-fi sniffer.
When it doesn't work, it doesn't work for hours, but sometimes out of sudden, without changing anything it starts working. It happens with all the stations, so the issue must be on router side. It can fail with one station, while working with another station at the same time. After some time the station that worked, may not work any more and the one that didn't work can become working. So it is really freaking mess.
Router config:
wlp9s0 - wireless interface.
lieta@lieta:~$ sudo brctl show
bridge name     bridge id               STP enabled     interfaces
br-lan          8000.40b076079e71       no              wlp9s0
lieta@lieta:~$ sudo ifconfig br-lan
br-lan: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet  netmask  broadcast
        inet6 fe80::501d:a6ff:fe26:bda4  prefixlen 64  scopeid 0x20<link>
        ether 40:b0:76:07:9e:71  txqueuelen 1000  (Ethernet)
        RX packets 75  bytes 26247 (25.6 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1667  bytes 137027 (133.8 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
lieta@lieta:~$ sudo ifconfig wlp9s0
wlp9s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 40:b0:76:07:9e:71  txqueuelen 1000  (Ethernet)
        RX packets 12353604  bytes 1970069716 (1.8 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 42134694  bytes 56333295441 (52.4 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
ieta@lieta:~$ sudo iwconfig wlp9s0
wlp9s0    IEEE 802.11  Mode:Master  Tx-Power=30 dBm
          Retry short limit:7   RTS thr=2347 B   Fragment thr:off
          Power Management:off
lieta@lieta:~$ sudo route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface         xxxxxxxxxxxx         UG    1024   0        0 eth0
xxxxxxxxxxxx   U     0      0        0 eth0
xxxxxxxxxxxx UH    1024   0        0 eth0   U     0      0        0 br-lan
Wi-fi card is Asus PCE-AC51 with Realtek RTL8812AE Wi-fi chip. I've used original driver that came with Debian, compiled it from sources - same thing.

Last edited by Lieta; 03-14-2019 at 08:54 AM.
Old 03-14-2019, 03:52 AM   #2
LQ Newbie
Registered: Nov 2013
Posts: 24

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Rep: Reputation: Disabled
Switched to 802.11an. Issue still present.

Last edited by Lieta; Today at 02:48 AM.


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