Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00.txt
Nick Buraglio <buraglio@es.net> Tue, 15 June 2021 23:36 UTC
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From: Nick Buraglio <buraglio@es.net>
Date: Tue, 15 Jun 2021 18:36:19 -0500
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To: Mark Smith <markzzzsmith@gmail.com>
Cc: Brian E Carpenter <brian.e.carpenter@gmail.com>, v6ops list <v6ops@ietf.org>
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Subject: Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00.txt
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Mark, Here is an example of correct behavior that I see literally every day. buraglio@netmon:~$ host gw-starlink.lab.buragl.io gw-starlink.lab.buragl.io has address 10.255.255.3 gw-starlink.lab.buragl.io has IPv6 address fd68:1e02:dc1a:ffff::3 buraglio@netmon:~$ ssh -vvv gw-starlink.lab.buragl.io OpenSSH_8.2p1 Ubuntu-4ubuntu0.2, OpenSSL 1.1.1f 31 Mar 2020 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: include /etc/ssh/ssh_config.d/*.conf matched no files debug1: /etc/ssh/ssh_config line 21: Applying options for * debug2: resolving "gw-starlink.lab.buragl.io" port 22 debug2: ssh_connect_direct debug1: Connecting to gw-starlink.lab.buragl.io [10.255.255.3] port 22. As expected, this breaks comprehensive dual stack testing using DNS (as one should) when compared to any real world behavior of GUA space. with the 0200::/7 block configured: buraglio@netmon:~$ host !$ host gw-starlink.lab.buragl.io gw-starlink.lab.buragl.io has address 10.255.255.3 gw-starlink.lab.buragl.io has IPv6 address 200:1e02:dc1a:ffff::3 ssh -vvv gw-starlink.lab.buragl.io OpenSSH_8.2p1 Ubuntu-4ubuntu0.2, OpenSSL 1.1.1f 31 Mar 2020 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: include /etc/ssh/ssh_config.d/*.conf matched no files debug1: /etc/ssh/ssh_config line 21: Applying options for * debug2: resolving "gw-starlink.lab.buragl.io" port 2 debug2: ssh_connect_direct debug1: Connecting to gw-starlink.lab.buragl.io [200:1e02:dc1a:ffff::3] port 22. debug1: Connection established. nb ---- Nick Buraglio On Tue, Jun 15, 2021 at 4:39 PM Mark Smith <markzzzsmith@gmail.com> wrote: > > > > On Wed, 16 Jun 2021, 07:00 Brian E Carpenter, <brian.e.carpenter@gmail.com> wrote: >> >> On 16-Jun-21 02:17, sthaug@nethelp.no wrote: >> >>> Maybe recommending the Global ID for L=0 be taken from the corresponding >> >>> 40 bits of the network's GUA Prefix. >> >>> >> >>> Just a thought. >> >> >> >> Understood, and a reasonable suggestion, however it still doesn’t address >> >> that ULA space precedence, effectively makes it useless for dual-stack >> lab >> >> scenarios. Even for IPv6 only it doesn’t work unless you take all the >> >> effort to turn off APIPA. >> > >> > Some of us use ULA for lab networks with no apparent problems. >> >> But if your test case wants the internal test addresses to have exactly >> the same behavior in address selection as external GUAs, the default >> precedence for ULAs is an issue. I think that's Ed's point. > > > We're all guessing until Ed explains in more detail what his issue is. > > Posting a copy of the IPv6 default address selection table without explanation doesn't do that. We need example test scenarios to see why there would be issues. > > It seems Ed thinks IPv4 is preferred more often in a dual stack network than it is, but I'm guessing. > > Regards, > Mark. > > > > >> >> Brian >> >> _______________________________________________ >> v6ops mailing list >> v6ops@ietf.org >> https://www.ietf.org/mailman/listinfo/v6ops > > _______________________________________________ > v6ops mailing list > v6ops@ietf.org > https://www.ietf.org/mailman/listinfo/v6ops
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Brian E Carpenter
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Nick Buraglio
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Mark Smith
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Brian E Carpenter
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Ed Horley
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Mark Smith
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Brian E Carpenter
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… David Farmer
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… David Farmer
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Nick Buraglio
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Nick Buraglio
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Mark Smith
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… David Farmer
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Mark Smith
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Brian E Carpenter
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Nick Buraglio
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Dale W. Carder
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Brian E Carpenter
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Ed Horley
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… David Farmer
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Ed Horley
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… sthaug
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Brian E Carpenter
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Mark Smith
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Nick Buraglio
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Ed Horley
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Kevin Myers
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… David Farmer
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Chris Cummings
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Owen DeLong
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… JORDI PALET MARTINEZ
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Fred Baker
- Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00… Gyan Mishra