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[204.195.22.127]) by smtp.gmail.com with ESMTPSA id c59sm8347331pje.10.2020.04.12.22.22.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 12 Apr 2020 22:22:14 -0700 (PDT) Date: Sun, 12 Apr 2020 22:22:05 -0700 From: Stephen Hemminger To: Fernando Gont Cc: netdev@vger.kernel.org, David Miller Subject: Re: [PATCH net-next] Implement draft-ietf-6man-rfc4941bis Message-ID: <20200412222205.04cb37cc@hermes.lan> In-Reply-To: <20200408104458.GA15473@archlinux-current.localdomain> References: <20200408104458.GA15473@archlinux-current.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Wed, 8 Apr 2020 07:44:58 -0300 Fernando Gont wrote: > Implement the upcoming rev of RFC4941 (IPv6 temporary addresses): > https://tools.ietf.org/html/draft-ietf-6man-rfc4941bis-09 > > * Reduces the default Valid Lifetime to 2 days > This reduces stress on network elements, among other things > > * Employs different IIDs for different prefixes > To avoid network activity correlation among addresses configured > for different prefixes > > * Uses a simpler algorithm for IID generation > No need to store "history" anywhere > > Signed-off-by: Fernando Gont > --- > Documentation/networking/ip-sysctl.txt | 2 +- > include/net/addrconf.h | 2 +- > include/net/if_inet6.h | 1 - > net/ipv6/addrconf.c | 85 +++++++++++--------------- > 4 files changed, 38 insertions(+), 52 deletions(-) > > diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt > index ee961d322d93..db1ee7340090 100644 > --- a/Documentation/networking/ip-sysctl.txt > +++ b/Documentation/networking/ip-sysctl.txt > @@ -1807,7 +1807,7 @@ use_tempaddr - INTEGER > > temp_valid_lft - INTEGER > valid lifetime (in seconds) for temporary addresses. > - Default: 604800 (7 days) > + Default: 172800 (2 days) You can't change defaults for existing users without a really good argument.