nanog mailing list archives
Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one?
From: Masataka Ohta <mohta () necom830 hpcl titech ac jp>
Date: Fri, 30 Dec 2011 07:30:16 +0900
Valdis.Kletnieks () vt edu wrote:
IGP snooping is not necessary if the host have only one next hop router.
You don't need an IGP either at that point, no matter what some paper from years ago tries to assert. :)
IGP is the way for routers advertise their existence, though, in this simplest case, an incomplete proxy of relying on a default router works correctly. Beyond that, if there are multiple routers, having a default router and relying on the default router for forwarding to other routers and/or supplying ICMP redirects stops working when the default router, the single point of failure, goes down, which is the incompleteness and/or incorrectness predicted by the paper of the end to end argument. Considering that the reason to have multiple routers should be for redundancy, there is no point to use one of them as the default router. Developing more complicated IGP proxy makes the incompleteness and the incorrectness not disappear but more complicated. Masataka Ohta PS Note that the paper was written in 1984, where as RFC791 was written in 1981.
Current thread:
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one?, (continued)
- 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: 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)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Masataka Ohta (Dec 29)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Kevin Loch (Dec 30)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Ray Soucy (Dec 30)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Joel jaeggli (Dec 30)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Valdis . Kletnieks (Dec 29)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Mark Andrews (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? Mark Andrews (Dec 29)
- Re: Misconceptions, was: IPv6 RA vs DHCPv6 - The chosen one? Jeff Kell (Dec 29)