From owner-freebsd-net@FreeBSD.ORG  Thu Jan 18 07:37:24 2007
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Date: Thu, 18 Jan 2007 18:37:20 +1100 (EST)
From: Bruce Evans <bde@zeta.org.au>
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To: Michael Widerkrantz <mc@hack.org>
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Cc: freebsd-net@freebsd.org
Subject: Re: Lenovo X60 em
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On Wed, 17 Jan 2007, Michael Widerkrantz wrote:

> I can verify that. I tried pinging the laptop from another machine
> (10.0.0.2) in my small home LAN.

> With smaller packets:
>
>  tim# ping -D -s 64 brain.internal
>  PING brain.internal.hack.org (10.0.0.20): 64 data bytes
>  72 bytes from 10.0.0.20: icmp_seq=0 ttl=64 time=0.450 ms
>  72 bytes from 10.0.0.20: icmp_seq=1 ttl=64 time=53.031 ms
>  72 bytes from 10.0.0.20: icmp_seq=2 ttl=64 time=48.112 ms
> ...
> Note what happens after the first packet.
>
> The other way, /from/ the laptop, seems fine, though:
>
>  brain# ping -D -s 64 tim.internal
>  PING tim.internal.hack.org (10.0.0.2): 64 data bytes
>  72 bytes from 10.0.0.2: icmp_seq=0 ttl=64 time=0.762 ms
>  72 bytes from 10.0.0.2: icmp_seq=1 ttl=64 time=0.565 ms

I've been working on reducing network latency, and now only
consider latency 10 times smaller than 0.565 mS to be fine
for a home LAN :-).

Bruce