[e2e] RES: What's wrong with this picture?

Stjepan Gros sgros at zemris.fer.hr
Mon Sep 7 23:02:22 PDT 2009

On Mon, 2009-09-07 at 11:37 -0300, Alexandre Grojsgold wrote:
> Hi,
> Looking at the first ping command, it seems  that the first packet was
> lost (icmp_seq=0), as well as a series of packets after the 15th,
> before David decided to ^C the ping execution. The 14 packets that
> went through experienced a huge delay, really hard to explain.

ping (at least on linux/fedora) starts with icmp_seq=1, so no packet was
lost. For example:

$ ping
PING ( 56(84) bytes of data.
64 bytes from icmp_seq=1 ttl=63 time=0.687 ms
64 bytes from icmp_seq=2 ttl=63 time=0.837 ms
--- ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1429ms
rtt min/avg/max/mdev = 0.687/0.762/0.837/0.075 ms

But it is interesting that the first ping command has been running for
slightly more than 33 seconds and during that time it only sent 24
probes, instead of at least 30 (one per second)?


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