Hping/Ping

[Dave Raven]

Hello again,
	Also, if I use tethereal to sniff for icmp packets to the host I'm
pinging I see them all even though I am getting drops --

23 packets transmitted, 22 packets received, 4% packet loss

The last two lines of my tethereal --

45  22.214610 x.x.x.x -> y.y.y.y ICMP Echo (ping) request
46  22.215133 y.y.y.y -> x.x.x.x ICMP Echo (ping) reply

46/2 (request/reply) = 23. So 23 packets actually went out and returned, yet
I still get drops?

Thanks again
Dave

-----Original Message-----
From: Dave Raven [mailto:dave at raven.za.net] 
Sent: Tuesday, February 26, 2008 6:21 PM
To: 'freebsd-net at freebsd.org'
Subject: Hping/Ping

Hi all,
	I have a problem where my machine is dropping packets and pings
after a few days of running (under load). The reason I'm mailing the -net
list is because I seem to have tracked down something I'm just not sure
where to look now. If I use ping I get 5% drops --

872 packets transmitted, 827 packets received, 5% packet loss
round-trip min/avg/max/stddev = 0.168/2.263/357.140/20.485 ms

If I use hping (to the exact same ip with icmp as well) I get none --

875 packets tramitted, 875 packets received, 0% packet loss
round-trip min/avg/max = 0.2/2.5/357.2 ms

Is there some buffer filling up? Where can I look to try get more
information. Any help/suggestions would be muchly appreciated

Thanks 
Dave