What could cause my ping to look like
--- 192.168.0.1 ping statistics --- 121 packets transmitted, 118 packets received, 2.5% packet loss round-trip min/avg/max/stddev = 2.689/154.201/1128.263/193.576 ms 
(Note: the ping stats and the image are from different ping ... sessions? Basically they don't summarise the same set of pings.)
As you can see, my ping is horribly inconsistent, with a minimum ping of 2.689, which is acceptable, but a maximum of 1128.263, which is definitely not acceptable for a ping to one's own router.
I have already tried restarting the router, even switching to a different router, which leads me to believe it's some kind of interference (it may not be)—but it's weird because the pings look the same from anywhere in my home! Even right next to the router.
All wireless computers show similarly horrible ping times, but all ethernet pings are consistently less than a millisecond.
The router is a Sky SR102, firmware version 2.91.2110.R and DSL firmware version A2pv6F039m1.d24m.
@Ramhound asked for my Bufferbloat score, these were the results (image)
I don't think it's the router neglecting ICMP, online games are suffering (which is what prompted me to start investigating my network in the first place) and also using traceroute with different protocols (ICMP, GRE, UDP) all show the same pings.
Neither of the routers support 5GHz.
The wireless connection to my own router is disgusting:
--- skyhub ping statistics --- 281 packets transmitted, 280 packets received, 0.4% packet loss round-trip min/avg/max/stddev = 1.885/43.345/2194.022/153.064 ms
(huge image you can click ^^)
I get similar pings on all the wifi-connected devices in this house, even right next to the router (a Sky SR102 with firmware 2.91.2110.R).
Ethernet devices have normal ping times.
How do I fix this so that all wifi-connected devices have low consistent pings?
121 Answer
Since we're talking about wireless devices, there's a number of potential causes. Having been through this, the first possible culprit is the medium: electromagnetic interference by other devices. Changing channels might help in that situation, i.e. in most of Europe trying channels 1, 6 or 11 might do something. I remember choosing channel 8 once (it was empty, so why not?) and after 4 hours of awful communication, on page 3-8 of this I saw my mistake (maximum interference). In another case, the antenna of the access point was badly soldered on the board and I had to open it and use a soldering iron on it. And of course the access point might have a faulty chip, but testing for such a thing without expensive equipment, which would buy you tens or even hundreds of ADSL routers, is practically impossible.
8
