From 7d85b06ecf4ca7449d84e71ced419b988c7dca12 Mon Sep 17 00:00:00 2001
From: Warner Losh <imp@FreeBSD.org>
Date: Wed, 1 Mar 2017 04:47:22 +0000
Subject: [PATCH] Fix VNET - DAD detected duplicate IPv6 address

Assign a hopefully unique, locally administered etheraddr. - for
epairNa & epairNb

Submitted by:	Catalin <sslevil@users.noreply.github.com>
Pull Request:	https://github.com/freebsd/freebsd/pull/92
---
 sys/net/if_epair.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/net/if_epair.c b/sys/net/if_epair.c
index 6ac65c68a7e..3f6c54e9c59 100644
--- a/sys/net/if_epair.c
+++ b/sys/net/if_epair.c
@@ -62,6 +62,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/sockio.h>
 #include <sys/sysctl.h>
 #include <sys/types.h>
+#include <sys/libkern.h>
 
 #include <net/bpf.h>
 #include <net/ethernet.h>
@@ -724,6 +725,7 @@ epair_clone_create(struct if_clone *ifc, char *name, size_t len, caddr_t params)
 		ifp = scb->ifp;
 		/* Assign a hopefully unique, locally administered etheraddr. */
 		eaddr[0] = 0x02;
+		eaddr[1] = arc4random() & 0xff;
 		eaddr[3] = (ifp->if_index >> 8) & 0xff;
 		eaddr[4] = ifp->if_index & 0xff;
 		eaddr[5] = 0x0b;