Warner Losh <i...@freebsd.org> 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 <ssle...@users.noreply.github.com> 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. -- Hiroki
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