Re: ipv6only-flag-02 & Flags Expansion Option
Brian E Carpenter <brian.e.carpenter@gmail.com> Wed, 19 September 2018 22:55 UTC
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Subject: Re: ipv6only-flag-02 & Flags Expansion Option
To: David Farmer <farmer@umn.edu>, Ole Troan <otroan@employees.org>
Cc: 6man WG <ipv6@ietf.org>
References: <CAN-Dau1wuzWWuevsGJZ_5w_mrZmSVLEsJDOw6LujGBWFS0t_0Q@mail.gmail.com>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Message-ID: <9b98b709-6fa7-bbb3-6e9b-f591be8f1e1c@gmail.com>
Date: Thu, 20 Sep 2018 10:55:27 +1200
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On 2018-09-20 07:34, David Farmer wrote: > On Wed, Sep 19, 2018 at 2:02 PM, Ole Troan <otroan@employees.org> wrote: > >> David, >> >>> This is not harmless. It costs us a bit from a limited pool, >> >> We have RFC5175 so this is hardly a scarce resource. >> > > Do most IPv6 stacks actually implement the Flags Expansion Option in > section 4 of RFC5175? > > Without the knowledge that most IPv6 stacks actually implement the Flags > Expansion Optio, I'd still characterize it as a limited resource. > > Maybe we should use flag bit 9 for this purpose if we move it forward. I wouldn't immediately reject that, since we are talking about something that requires an update to the host IPv6 stack anyway. Maybe we should actually have a conversation about the best possible use of the two reserved bits in the current flag byte. Brian
- ipv6only-flag-02 & Flags Expansion Option David Farmer
- Re: ipv6only-flag-02 & Flags Expansion Option Brian E Carpenter
- Re: ipv6only-flag-02 & Flags Expansion Option Alexandre Petrescu