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Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one?
From: Valdis.Kletnieks () vt edu
Date: Wed, 28 Dec 2011 14:04:45 -0500
On Wed, 28 Dec 2011 21:56:19 +0900, Masataka Ohta said:
According to the end to end argument, the only possible solution to the problem, with no complete or correct alternatives, is to let hosts directly participate in IGP activities.
That's only for hosts that are actively trying to communicate on more than one interface at a time, and even then quite often the *actual* right answer isn't "run an IGP", it's "insert static routes for the subnets you need to reach via the other interface"(*). Meanwhile, out in the real world, 98% of actual hosts have a *really* easy routing decision - they can make a choice of any of one routers to reach the destination. If it's a laptop that has both a wireless and a wired connection active, usually a simple "prefer wired" or "prefer wireless" is sufficient. Quick sanity check on the hypothesis: Does Windows ship with an IGP enabled by default? If not, why does the net continue to function just fine without it? Hmm.. Thought so. Maybe an IGP on end hosts isn't quite as needed on production networks as an academic paper from years ago might suggest. (*) If you think I'm going to run an IGP on some of my file servers when "default route to the world out the public 1G interface, and 5 static routes describing the private 10G network" is actually the *desired* semantic because if anybody re-engineers the 10G net enough to make me change the routes, I have *other* things to change as well, like iptables entries and /etc/exports and so on. I don't *want* an IGP changing that stuff around wiithout the liveware taking a meeting to discuss deployment of the change.
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Current thread:
- Re: IPv6 RA vs DHCPv6 - The chosen one?, (continued)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Owen DeLong (Dec 19)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Mohacsi Janos (Dec 20)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Don Gould (Dec 20)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Iljitsch van Beijnum (Dec 28)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Masataka Ohta (Dec 28)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Ray Soucy (Dec 28)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Masataka Ohta (Dec 28)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Ray Soucy (Dec 28)
- RE: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Vitkovsky, Adam (Dec 29)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Tony Li (Dec 29)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Valdis . Kletnieks (Dec 28)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Masataka Ohta (Dec 28)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Valdis . Kletnieks (Dec 28)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Masataka Ohta (Dec 28)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Michael Painter (Dec 29)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Owen DeLong (Dec 19)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Florian Weimer (Dec 29)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Valdis . Kletnieks (Dec 29)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Masataka Ohta (Dec 29)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Valdis . Kletnieks (Dec 29)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Masataka Ohta (Dec 29)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Steven Bellovin (Dec 29)