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Date:      Thu, 21 Jul 2011 09:56:50 -0400
From:      Lowell Gilbert <Lowell@Be-Well.Ilk.Org>
To:        Aryeh Friedman <>
Cc:        FreeBSD Mailing List <>
Subject:   Re: best way to force a single packet to be sent via a specific interface
Message-ID:  <>
In-Reply-To: <> (Aryeh Friedman's message of "Thu, 21 Jul 2011 04:00:20 -0400")
References:  <>

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Aryeh Friedman <> writes:

> I have both ethernet (the default route and such) and ppp done via
> "ppp -ddial" the man page for ppp(8) says tun0 will not have an IP
> assigned until a single packet is sent on it... what is the best way
> to have one packet sent on it (ping only always ifaces on multicast,
> traceroute seems to have no way to say exit after the first hop and/or
> after one packet is sent, tcpdump refuses a "-c 0" arg saying it is
> illegal)

I can't parse what you said about ping.  
I seem to recall doing that (with '-I' back when I was doing demand
dialing with ppp(8).

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