> Date: Mon, 28 Dec 2009 18:02:29 -0800 (PST) > From: Pamela Rock <[email protected]> > > > > --- On Mon, 12/28/09, Mark Andrews <[email protected]> wrote: > > > From: Mark Andrews <[email protected]> > > Subject: Re: IPv6 TCP > > To: "Pamela Rock" <[email protected]> > > Cc: "Kevin Oberman" <[email protected]>, "Chuck Anderson" <[email protected]>, > > [email protected] > > Date: Monday, December 28, 2009, 8:22 PM > > > > In message <[email protected]>, > > Pamela Rock writes: > > > This query is to anyone in general, based on the > > previous dig statement, do= > > > es the following command make sense?? > > > > > > dig -6 www.es.net @some:ipv6:address +tcp > > > > > > I'm wondering if the combination of -6, > > @some:ipv6:address, and +tcp even m= > > > ake sense. That is ultimately what I'm trying to > > achieve. > > > > Yes, it make sense. The following will retrieve the > > SOA record > > from ns-ext.isc.org using its IPv6 address over tcp. > > If you put a > > literal IPv6 address rather than a name then the -6 is not > > needed. > > That's it!! So you are saying if I can use either -6 or > MY:IPv6:Address, but I don't have to use both? Is that accurate? If > so, that resolves the issue.
If you tell dig(1) to query an IPv6 address, it has no choice but to use IPv6, so -6 is unnecessary and -4 is an error. The only reason for the -4 and -6 options is to force that protocol to be used when a name is provided and it has both v4 and v6 addresses. That said, using -6 with an IPv6 address should not cause a problem. It certainly works fine for me. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: [email protected] Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751
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