On Tue, Feb 28, 2017 at 10:18 PM, Hiroki Sato wrote:
> Warner Losh wrote
> in <201703010447.v214lm4c026...@repo.freebsd.org>:
>
> im> Author: imp
> im> Date: Wed Mar 1 04:47:22 2017
> im> New Revision: 314471
> im> URL: https://svnweb.freebsd.org/changeset/base/314471
> im>
> im> Log:
> im> Fix VNET - DAD detected duplicate IPv6 address
> im>
> im> Assign a hopefully unique, locally administered etheraddr. - for
> im> epairNa & epairNb
> im>
> im> Submitted by: Catalin
> im> Pull Request: https://github.com/freebsd/freebsd/pull/92
>
> This was discussed in D1858. epairNa and epairNb never have the same
> L2 addr because eaddr[5] is unique. If the goal of this change is to
> prevent a conflict of L2 addrs with epairNs created in another vnet
> jail on the same system or on the same network, eaddr[5] of epairNa
> (around l.839) must also be randomized at least.
>
> While I am still for a deterministic value because changing the L2
> addr every time when rebooting a vnet jail is annoying, but if we use
> some random numbers for the vendor bits, I think eaddr[2] should be
> initialized in the same way.
It's clear the consensus there was 'no go' and I don't wish to
override it. I didn't know about that, so I'll revert.
Warner
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