Cannot initialize Compex WLE600VX for 802.11ac?

[Tom Marble]

Tomasz Skapski <tomasz.skapski at tieto.com> writes:
> In your config file set 'fragm_threshold=-1', or comment it.

Indeed this was the last critical configuration change...
Now I'm able to bring up the interface!

Then I was getting errors when 'ifup'-ing the interface
  RTNETLINK answers: File exists
which were resolved by ensuring that
1. The interface was flushed prior to being up'ed
   ip addr flush dev wlan0
2. The interface was *not* configured to add an (additional) gateway

Following this the interface would not stay up due to avahi-daemon
decideding it didn't like something and removing the address
  avahi-daemon[2925]: Withdrawing address record for 10.6.8.1 on wlan0.

The solution here was just removing avahi-daemon (and mDNS services).

Then the interface wasn't happy about IPv6
  IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not read

Even with setting (in /etc/hostapd/wlan0.conf ) this problem still occurred.
  ipaddr_type_availability=32

The solution was disabling IPv6 (at least for now.. I do want IPv6
eventually), in /etc/sysctl.conf
# NO IPV6                                                                        net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
net.ipv6.conf.eth0.disable_ipv6 = 1
net.ipv6.conf.wan0.disable_ipv6 = 1

I also rebuilt hostapd because it seems to have a version locked
dependency of libssl (for some reason?).

With the addition of dnsmasq (for DHCP and DNS proxying) and
simple nftables rules for nat/masquerade I now have a functioning AP!

Certain clients seemed to get "kicked off" the network which has
been mitigated by setting:
  ap_max_inactivity=600
  disassoc_low_ack=0

One problem that results in clients getting removed from the AP is:
Jun 23 19:07:28 six kernel: [  995.006727] wlan0: dropped frame to 00:01:02:03:37:15 (unauthorized port)

... and I'm not sure what's causing that?

Amusingly certain Android clients seem to constantly "fishing" to find
active networks (these messages occur every 15 seconds):
Jun 23 21:26:23 six kernel: [ 9330.082522] wlan1: STA 00:01:02:03:37:15 aid 1 enters power save mode
Jun 23 21:26:38 six kernel: [ 9345.059365] wlan1: STA 00:01:02:03:37:15 aid 1 exits power save mode
Jun 23 21:26:38 six kernel: [ 9345.059408] wlan1: STA 00:01:02:03:37:15 aid 1 sending 0 filtered/0 PS frames since STA \
not sleeping anymore
Jun 23 21:26:39 six kernel: [ 9345.364866] wlan1: STA 00:01:02:03:37:15 aid 1 enters power save mode

In other good news I added a second nic (wlan1) to handle 2.4 GHz
traffic in the form of a TP-LINK TL-WN722N which is supported by
the driver ath9k_htc. Using a separate instance of hostapd for wlan1
I now have a dual mode access point!

I found I had to move the TL-WN722N antenna as far away as possible
to minimize interference with the 5 GHz signal.

One strange thing I've noticed is that if I configure the wlan0 (5 GHz)
channel=52 on boot up it doesn't work... However if I have once
done channel=0 then on subsequent bounces of the interface I can have
it come up on a specific channel.

Thanks Tomasz and Kalle for your help!!!

--Tom


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