Re: [Idr] WG adoption call for draft-merciaz-idr-bgp-bfd-strict-mode-02.txt (9/2 to 9/17/2019)
Robert Raszuk <robert@raszuk.net> Mon, 09 September 2019 21:43 UTC
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From: Robert Raszuk <robert@raszuk.net>
Date: Mon, 09 Sep 2019 23:43:34 +0200
Message-ID: <CAOj+MMEO-btSTkayAnDOv9rBTmU=yVBP20waNSy-O0oa3gNZPg@mail.gmail.com>
To: "Mercia Zheng (merciaz)" <merciaz@cisco.com>
Cc: "Acee Lindem (acee)" <acee@cisco.com>, "idr@ietf.org" <idr@ietf.org>, Susan Hares <shares@ndzh.com>
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Subject: Re: [Idr] WG adoption call for draft-merciaz-idr-bgp-bfd-strict-mode-02.txt (9/2 to 9/17/2019)
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Hi Mercia, Many thx for an ack and reply. Yes making the reference to RFC5882 section 10.2 is helpful. I see some today may still run BFD on IBGP sessions for no reason. In fact it is actually a sign of bad BGP design if such IBGP sessions are towards route reflectors. > There could still be cases where users only want to run iBGP BFD since no IGP is enabled > (e.g. fully mesh case). Well let's not equate full mesh of IBGP with deployment of BGP as IGP. Those are completely different deployment models. While someone could run iBGP in a p2p mode as DC reachability protocol that is rather an exception then a rule. Concluding - I think it would be pretty safe to state that draft applies only to point-to-point BGP sessions. Kind regards, Robert. On Mon, Sep 9, 2019 at 11:32 PM Mercia Zheng (merciaz) <merciaz@cisco.com> wrote: > Hi Robert, > > > > Thanks for the review comments. > > The similar question has been asked early on whether or not this draft > should be only for eBGP. > > BGP BFD is enabled mostly for eBGP. RFC5882 section 10.2 specifies “it > is generally > > *unwise* for IBGP sessions to interact with BFD if the underlying IGP > > is already doing so.”. > > > > There could still be cases where users only want to run iBGP BFD since no > IGP is enabled > > (e.g. fully mesh case). > > > > Anyway, we’ll take care of this comment in the next revision. > > > > Thanks, > > Mercia > > > > *From: *Idr <idr-bounces@ietf.org> on behalf of Robert Raszuk < > robert@raszuk.net> > *Date: *Sunday, September 8, 2019 at 2:37 PM > *To: *"Acee Lindem (acee)" <acee@cisco.com> > *Cc: *"idr@ietf.org" <idr@ietf.org>, Susan Hares <shares@ndzh.com> > *Subject: *Re: [Idr] WG adoption call for > draft-merciaz-idr-bgp-bfd-strict-mode-02.txt (9/2 to 9/17/2019) > > > > Hi Acee, > > > > I have read the draft. Have one key question in fact triggered by > colleagues comment below :) > > > > In the draft you are not making any distinction between iBGP and eBGP > sessions. Is this intentional ? > > > > Procedures to establish and maintain eBGP vs iBGP sessions are > vastly different hence an obvious question if you intentionally made no > distinction or perhaps you had in mind all along that the draft applies > only to eBGP ? > > > > I think for eBGP it is useful, for iBGP I already see real cases where it > may not give you what you expect. > > > > In any case I support the adoption. > > > > Thx, > > Robert. > > > > > > On Fri, Sep 6, 2019 at 9:57 PM Acee Lindem (acee) <acee@cisco.com> wrote: > > Speaking as a co-author, I support WG adoption. > > Thanks, > Acee > > > > *From: *Idr <idr-bounces@ietf.org> on behalf of Susan Hares < > shares@ndzh.com> > *Date: *Monday, September 2, 2019 at 2:02 PM > *To: *IDR List <idr@ietf.org> > *Subject: *[Idr] WG adoption call for > draft-merciaz-idr-bgp-bfd-strict-mode-02.txt (9/2 to 9/17/2019) > > > > This begins a 2 week WG adoption call for > draft-merciaz-idr-bgp-bfd-strict-mode-02.txt which you can access at: > > > > https://datatracker.ietf.org/doc/draft-merciaz-idr-bgp-bfd-strict-mode/ > > > > For those who have indicated support for this draft during the lengthy IPR > call, you are welcome to comment again > > or to trust that the IDR chairs read your comments during the lengthy IPR > call. > > > > Please indicate if you think this draft is a good start for using the BFD > technology > > as a check that prevents BGP connectivity until BFD session is established > > (indicating link connectivity). > > > > Cheerily, Susan Hares > > > > _______________________________________________ > Idr mailing list > Idr@ietf.org > https://www.ietf.org/mailman/listinfo/idr > >
- [Idr] WG adoption call for draft-merciaz-idr-bgp-… Susan Hares
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Ketan Talaulikar (ketant)
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Jakob Heitz (jheitz)
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Acee Lindem (acee)
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Yingzhen Qu
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Jeff Tantsura
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Albert Fu (BLOOMBERG/ 120 PARK)
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Robert Raszuk
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Linda Dunbar
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Enke Chen (enkechen)
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Mercia Zheng (merciaz)
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Mercia Zheng (merciaz)
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Robert Raszuk
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Jeffrey Haas
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Jeffrey Haas
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Robert Raszuk
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Robert Raszuk
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Jeffrey Haas
- Re: [Idr] WG adoption call for draft-merciaz-idr-… Acee Lindem (acee)