Re: distributed vs centralized approaches to ND security

Nick Hilliard <nick@foobar.org> Sun, 09 August 2020 20:08 UTC

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Subject: Re: distributed vs centralized approaches to ND security
To: Michael Richardson <mcr+ietf@sandelman.ca>
Cc: v6ops list <v6ops@ietf.org>, 6man <ipv6@ietf.org>
References: <96fa6d80137241dd9b57fcd871c8a897@huawei.com> <CAFU7BARePzdeU5DFgoOWyrF0xZCj67_xkC2t8vMN2nH0d8aUig@mail.gmail.com> <37e2a7110f6b423eba0303811913f533@huawei.com> <CAFU7BATiD8RkiWXjrxGuAJU-BUwRQCErYZivUPZ-Mc_up_qGxQ@mail.gmail.com> <aebc46c9b813477b9ae0db0ef33e7bd9@huawei.com> <CAO42Z2yL7+GbO6QRaNzFYoBXLF-JZ2NfwgTTt2zerKhJLwt2Lw@mail.gmail.com> <3C1ECB6F-E667-4200-964F-AB233A0A56E9@cisco.com> <dfb9ccbfd87140cfba01c69447581aef@boeing.com> <15197.1596499036@localhost> <63afd5c67e7c4520b8b7ebabec69cab7@huawei.com> <MN2PR11MB3565E0E206799B95AE6295D7D84A0@MN2PR11MB3565.namprd11.prod.outlook.com> <e64151b767cc4aef9444a2fe546f474f@huawei.com> <10665.1597003350@localhost>
From: Nick Hilliard <nick@foobar.org>
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Date: Sun, 09 Aug 2020 21:08:30 +0100
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Michael Richardson wrote on 09/08/2020 21:02:
> SLAAC has the features that it is seems completely stateless for the routers.
> One can as many add routers to the network as desired to deal with whatever
> resilience issues one has.   Many IPv4 experienced people are startled to
> realize that one does not need VRRP or anything to have redundant routers in
> IPv6.

with respect, ND/RA has awful failover characteristics if a router 
disappears.  NHRPs like VRRP do a much better job.

Nick