Why WiFi connections are established so slowly?

[Yuri]

I just measured: 20-40 seconds elapse between the insertion of the WiFi
card and the host obtaining IP address. This is quite slow IMHO. It is
hard to imagine that exchanging a few packets back and forth should take
that long.


Is something wrong with my setup? Can there be some bug that affects
this? Or should this be considered normal?


/etc/rc.config has:

wlans_run0="wlan0"

ifconfig_wlan0="WPA SYNCDHCP"

wpa_supplicant_enable="YES"

wpa_supplicant_program="/usr/local/sbin/wpa_supplicant"


run(4), FreeBSD 12 amd64.


Thanks,

Yuri

[Vladimir Botka]

On Tue, 30 Oct 2018 16:01:10 -0700

Post by Yuri
I just measured: 20-40 seconds elapse between the insertion of the WiFi
card and the host obtaining IP address. This is quite slow IMHO. It is
hard to imagine that exchanging a few packets back and forth should take
that long.
...

Setting "scan_freq: List of frequencies to scan" makes the connection faster
(especially for dual-band).
https://w1.fi/cgit/hostap/plain/wpa_supplicant/wpa_supplicant.conf

HTH,
-vlado

[Adrian Chadd]

It'd be interesting to figure out how much each step is taking. Eg, USB
detect, firmware load, create interface, bstart wpa_supplicant, etc - that
should be quick. I wonder if scan is taking forever..

Post by Yuri
I just measured: 20-40 seconds elapse between the insertion of the WiFi
card and the host obtaining IP address. This is quite slow IMHO. It is
hard to imagine that exchanging a few packets back and forth should take
that long.
Is something wrong with my setup? Can there be some bug that affects
this? Or should this be considered normal?
wlans_run0="wlan0"
ifconfig_wlan0="WPA SYNCDHCP"
wpa_supplicant_enable="YES"
wpa_supplicant_program="/usr/local/sbin/wpa_supplicant"
run(4), FreeBSD 12 amd64.
Thanks,
Yuri
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