nanog mailing list archives
Re: Problems with NS*.worldnic.com
From: "william(at)elan.net" <william () elan net>
Date: Mon, 25 Apr 2005 22:19:51 -0700 (PDT)
On Tue, 26 Apr 2005 Valdis.Kletnieks () vt edu wrote:
On Mon, 25 Apr 2005 21:34:54 PDT, Rodney Joffe said:I am not sure whether the correct solution is to "fix" dig so that is tries ipv4, or to get the os "fixed" on a dual stack capable system so that if there is not ipv6 connectivity it disables that part of the system. I suspect the first is appropriate, because there are obviously internal processes that may validly want to use ipv6 even though there is no ipv6 connection.The problem is that you *could* have local/campuswide ipv6 connectivity, but not have an IPv6 connection to the outside world. So my system comes up, it sees a Router Advertisement, it can get to other IPv6 systems that are 3-4 hops away. So how is it supposed to "know" that it doesn't have an ipv6 connection? Presumably the same way it "knows" it doesn't have an ipv4 connection when your OC-moby to the outside world falls over, but it's still perfectly able to talk to the entire rest of your corporate network....
Perhaps a solution is to specifically enable ipv6 dns resolution as preferable to ipv4 or the other way around. This could perhaps be
switch in resolv.conf or nsswitch.conf. Something like: /etc/nsswitch.conf ... hosts: files dns dns-resolver: AAAA [NOTFOUND=return] A6 A Note: in this meaning NOTFOUND is only true when NXDOMAIN but not for NODATA OR /etc/resolv.conf search example.com protocol ipv6 ipv4 -- William Leibzon Elan Networks william () elan net
Current thread:
- Problems with NS*.worldnic.com Greg Schwimer (Apr 25)
- Re: Problems with NS*.worldnic.com aljuhani (Apr 25)
- Re: Problems with NS*.worldnic.com Randy Bush (Apr 25)
- Re: Problems with NS*.worldnic.com Matt Larson (Apr 25)
- Re: Problems with NS*.worldnic.com Janet Sullivan (Apr 25)
- Re: Problems with NS*.worldnic.com Rodney Joffe (Apr 25)
- Re: Problems with NS*.worldnic.com Suresh Ramasubramanian (Apr 25)
- Re: Problems with NS*.worldnic.com Kevin Loch (Apr 26)
- Re: Problems with NS*.worldnic.com Valdis . Kletnieks (Apr 25)
- Re: Problems with NS*.worldnic.com Randy Bush (Apr 25)
- Re: Problems with NS*.worldnic.com william(at)elan.net (Apr 25)
- Re: Problems with NS*.worldnic.com Valdis . Kletnieks (Apr 26)
- Re: Problems with NS*.worldnic.com Matt Larson (Apr 25)
- Re: Problems with NS*.worldnic.com Edward Lewis (Apr 26)
- Message not available
- The "not long discussion" thread.... Jerry Pasker (Apr 26)
- Re: The "not long discussion" thread.... Steve Sobol (Apr 26)
- Re: The "not long discussion" thread.... Christopher L. Morrow (Apr 26)
- Re: The "not long discussion" thread.... Jerry Pasker (Apr 27)
- Re: The "not long discussion" thread.... Christopher L. Morrow (Apr 27)
- <Possible follow-ups>
- RE: Problems with NS*.worldnic.com Graeme Clark (Apr 25)
- RE: Problems with NS*.worldnic.com Christopher L. Morrow (Apr 25)