On my network, there are five routers with different architectures which, whenever I get around to it, get a new image built from trunc.
The last image was from January and I didn't notice anything out of the ordinary.
But the images from last week and the day before yesterday appear to have unstable WiFi.
From time to time, there are huge stutters and strange delays. Everything in /etc/config/ is the same as it was before.
The noise is reported by the AP to be -107 dBm while it's working and when it's wonky.
The busy/active-ratio is about 0.1. I've calculated the offsets from before and after a ping-capture while it was wonky, found it to be 0.1 then as well, and decided it's unlikely to be a relevant factor.
This is an average output of ping:
- from the AP to the client:
--- 192.168.0.124 ping statistics --- 20 packets transmitted, 20 packets received, 0% packet loss round-trip min/avg/max = 2.597/128.578/259.988 ms
- the other way around:
--- n1212.fritz.box ping statistics --- 20 packets transmitted, 20 received, 0% packet loss, time 19030ms rtt min/avg/max/mdev = 1.914/10.191/69.681/17.618 ms
Both pings were run simultaneously. Note the different deviation when pinging the client.
But when it's particularly crazy:
- AP -> client
--- 192.168.0.124 ping statistics --- 40 packets transmitted, 12 packets received, 70% packet loss round-trip min/avg/max = 3.095/14.371/45.857 ms
- client -> AP
--- n1212.fritz.box ping statistics --- 40 packets transmitted, 22 received, 45% packet loss, time 117619ms rtt min/avg/max/mdev = 3.955/286.780/1033.594/454.832 ms
What could cause such a difference?
Both directions require a round trip - shouldn't the timings be similar?
Is there something else I should have a look at?