Date: Sun, 12 Apr 1998 13:15:24 +0930 From: Greg Lehey <grog@lemis.com> To: Tim Moony <timm@uniqsite.com>, FreeBSD Questions Forum <questions@FreeBSD.ORG> Subject: Re: What the hell is DUP! Message-ID: <19980412131524.E24376@freebie.lemis.com> In-Reply-To: <Pine.BSF.3.96.980411202811.421A-100000@uniqsite.com>; from Tim Moony on Sat, Apr 11, 1998 at 08:32:29PM -0700 References: <Pine.BSF.3.96.980411202811.421A-100000@uniqsite.com>
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On Sat, 11 April 1998 at 20:32:29 -0700, Tim Moony wrote:
> Can someone explains this? I have two 2.2.6 machines connected by a
> 16bit ed0 card and the other 32bit fxp0 card:
>
>
> PING nic2.xxxxxxxx.com (206.14.149.42): 56 data bytes
^^^^^^^^^^^^^^^^^
This name should be n42.cs32a.value.net.
> 64 bytes from 206.14.149.41: icmp_seq=0 ttl=255 time=0.295 ms
> 64 bytes from 206.14.149.42: icmp_seq=0 ttl=255 time=1.155 ms (DUP!)
> 64 bytes from 206.14.149.41: icmp_seq=1 ttl=255 time=0.204 ms
> 64 bytes from 206.14.149.42: icmp_seq=1 ttl=255 time=0.537 ms (DUP!)
>
> --- nic2.xxxxxxxx.com ping statistics ---
> 2 packets transmitted, 2 packets received, +2 duplicates, 0% packet loss
> round-trip min/avg/max/stddev = 0.204/0.548/1.155/0.371 ms
>
> What is "DUP?"
It's short for "duplicate". It's telling you that two machines are
replying to the ping. Assuming you haven't changed anything else in
the example, n41.cs32a.value.net (206.14.149.41) is misconfigured and
is answering to ICMP messages which have nothing to do with it.
Possibly it has had the address 206.14.149.42 added as an alias.
Greg
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