Re: [secdir] secdir review of draft-ietf-ospf-node-admin-tag-05
Benjamin Kaduk <kaduk@MIT.EDU> Tue, 13 October 2015 22:58 UTC
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Date: Tue, 13 Oct 2015 18:57:50 -0400
From: Benjamin Kaduk <kaduk@MIT.EDU>
To: "Acee Lindem (acee)" <acee@cisco.com>
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Cc: "draft-ietf-ospf-node-admin-tag.all@ietf.org" <draft-ietf-ospf-node-admin-tag.all@ietf.org>, "secdir@ietf.org" <secdir@ietf.org>, Shraddha Hegde <shraddha@juniper.net>, "iesg@ietf.org" <iesg@ietf.org>
Subject: Re: [secdir] secdir review of draft-ietf-ospf-node-admin-tag-05
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On Tue, 13 Oct 2015, Acee Lindem (acee) wrote: > > On 10/13/15, 6:27 PM, "Benjamin Kaduk" <kaduk@MIT.EDU> wrote: > > >On Sun, 11 Oct 2015, Shraddha Hegde wrote: > > > >> >(easily) be unset. Would force-expiring an LSA be enough to reset the > >> >tag, or something else? > >> > >> Yes - this is standard for any OSPF LSA. However, since the OSPF RI LSA > >> may include other TLVs or even other tags, a tag could also be withdrawn > >> by reoriginating the RI LSA without the TLV or with a TLV that doesn’t > >> include the withdrawn tag. > > > >I may still be confused, but I did not interpret the text in that way. > >That is, the text about "all instances of the RI LSA originated by that > >node". (Which I changed to "instances of RI LSAs" in my grammar edits, > >possibly incorrectly if I'm still confused.) I was interpreting the word > >"instances" to include historical ones over time, so that even if an RI > >LSA carrying a particular admin tag was replaced by a different RI LSA > >for the same advertising router, the old one would still be an instance of > >that RI LSA. Going back to RFC 2328, I'm not sure what exactly I had in > >mind in terms of ages and scopes and sequence numbers that would cause > >this > >situation, but I somehow had it in my mind that there could be multiple RI > >LSAs active at the same time that apply to a given node, such as if the > >admin just added a new RI LSA containing only the admin tag to augment the > >existing RI LSAs being sent. Is that possible? > > In OSPF, a more-recent version or instance of an LSA will always supersede > all previous instances of the same LSA. Thanks for clarifying. So, this is a non-issue, and the only question is whether the text could/should be changed to improve clarity. -Ben
- [secdir] secdir review of draft-ietf-ospf-node-ad… Benjamin Kaduk
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Acee Lindem (acee)
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Acee Lindem (acee)
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Benjamin Kaduk
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Benjamin Kaduk
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Acee Lindem (acee)
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Benjamin Kaduk
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Acee Lindem (acee)
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Acee Lindem (acee)
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Benjamin Kaduk
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Benjamin Kaduk
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Acee Lindem (acee)
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Acee Lindem (acee)
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Shraddha Hegde
- Re: [secdir] secdir review of draft-ietf-ospf-nod… bruno.decraene
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Shraddha Hegde
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Shraddha Hegde
- Re: [secdir] secdir review of draft-ietf-ospf-nod… bruno.decraene
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Shraddha Hegde
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Shraddha Hegde
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Shraddha Hegde
- Re: [secdir] secdir review of draft-ietf-ospf-nod… Shraddha Hegde