From owner-freebsd-net@FreeBSD.ORG  Tue Jul 12 12:42:15 2005
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Date: Tue, 12 Jul 2005 16:38:00 +0400
From: Roman Kurakin <rik@cronyx.ru>
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Subject: ping delay, initial request
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Hi,

    I am starting to investigate some net problem and I wonder if this
problem seen/known.
    The problem was observed with ce(4) (Cronyx Tau32-PCI/Lite,
it is not in the tree yet, but similar to cp(4)/ctau(4) devices) and 
sppp(4).
If you run usual ping you will see normal delay which is much less than 
1sec.
But if you run flood ping, stop it, and run normal ping again you'll see 
delay
about one sec.

ping x.x.x.x
delay << 1 sec
ping -f x.x.x.x
average delay << 1 sec
ping x.x.x.x
delay ~ 1 sec

This was seen on FreeBSD 4.11 stable.

Any ideas? Does any body observed such behaviour in other environment?

rik