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I have problems with my uplink that I am trying to analyze and understand (in hope my ISP will be able to do something about that - they tested the line and found no problems, sadly, problems are transient and appear in random moments).
Simplest thing - ping. bpp.com.pl is a domain I own, hosted at home.pl, one of the largest (or perhaps the largest) web hosting service services in Poland:
Looks OK, doesn't it? Well... no. How come it takes over 55 seconds to send and receive 20 packets, if they are sent in 1 second intervals? Just watching how the ping displays results it is obvious some packets take many seconds to travel, yet they are reported as if they traveled in just a little bit over 60 ms. How is the time measured?
Simplest thing - ping. bpp.com.pl is a domain I own, hosted at home.pl, one of the largest (or perhaps the largest) web hosting service services in Poland:
Code:
borek@raspberrypi ~ $ ping -c 20 bpp.com.pl
PING bpp.com.pl (212.85.97.214) 56(84) bytes of data.
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=1 ttl=57 time=99.8 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=2 ttl=57 time=122 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=3 ttl=57 time=64.1 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=4 ttl=57 time=65.4 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=5 ttl=57 time=69.5 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=6 ttl=57 time=64.4 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=7 ttl=57 time=97.2 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=8 ttl=57 time=742 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=9 ttl=57 time=99.7 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=10 ttl=57 time=101 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=11 ttl=57 time=101 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=12 ttl=57 time=101 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=13 ttl=57 time=63.5 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=14 ttl=57 time=65.5 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=15 ttl=57 time=63.9 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=16 ttl=57 time=66.7 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=17 ttl=57 time=65.5 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=18 ttl=57 time=65.1 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=19 ttl=57 time=64.7 ms
64 bytes from v000468.home.net.pl (212.85.97.214): icmp_req=20 ttl=57 time=63.6 ms
--- bpp.com.pl ping statistics ---
20 packets transmitted, 20 received, 0% packet loss, time 55609ms
rtt min/avg/max/mdev = 63.553/112.436/742.109/145.656 ms