Re: [Idr] BGP autoconfiguration - draft-minto-idr-bgp-autodiscovery
Robert Raszuk <robert@raszuk.net> Sun, 20 March 2022 23:45 UTC
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From: Robert Raszuk <robert@raszuk.net>
Date: Mon, 21 Mar 2022 00:46:03 +0100
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To: Susan Hares <shares@ndzh.com>
Cc: Jeffrey Haas <jhaas@pfrc.org>, "idr@ietf. org" <idr@ietf.org>, draft-minto-idr-bgp-autodiscovery@ietf.org, Minto Jeyananth <minto=40juniper.net@dmarc.ietf.org>
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Subject: Re: [Idr] BGP autoconfiguration - draft-minto-idr-bgp-autodiscovery
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Sue, > but the implementation selecting particular interface. But this is precisely the crux of the perhaps subtle point. Interesting/modern encapsulations are not (or do not need to be) expressed as an interface. Neither logical nor physical. Many thx, R. On Mon, Mar 21, 2022 at 12:35 AM Susan Hares <shares@ndzh.com> wrote: > Robert: > > > > The L3DN only requires IPv4 or IPv6 native. BGP, as a protocol only uses > IPv4 or IPv6 native. > > > > I am comforted to hear that my use case is clearer. I realize that most > MPLS interfaces support IP routing/switching (for about 20 years). Please > note that it is not the protocol BGP that is enforcing the policy, but the > implementation selecting particular interface. The encapsulation > information is optional. > > > > If you wish to remove this option, it is a useful input to the authors. > > > > Thanks for your feedback. > > > > Sue > > > > *From:* Robert Raszuk [mailto:robert@raszuk.net] > *Sent:* Sunday, March 20, 2022 7:21 PM > *To:* Susan Hares > *Cc:* Jeffrey Haas; idr@ietf. org; > draft-minto-idr-bgp-autodiscovery@ietf.org; Minto Jeyananth > *Subject:* Re: [Idr] BGP autoconfiguration - > draft-minto-idr-bgp-autodiscovery > > > > Sue, > > > > What encapsulation happens to be used by BGP or for that matter any other > protocol is (and should be) protocol agnostic. > > > > I hope we are not trying here to bind a TCP session to encapsulation X or > Y irrespective of what routing (and given encap orchestration - LDP FEC > binding or SR policy or something else) tells you to do. That would quickly > get very very inconsistent and prone to many failures. > > > > Btw there is no such a thing as "MPLS interface". All MPLS interfaces I > have seen do support IP routing/switching too. And honestly it may be much > better if BGP keeps its transport limited to IPv4 and IPv6 native. > > > > Thx, > > Robert > > > > > > > > > > > > On Mon, Mar 21, 2022 at 12:02 AM Susan Hares <shares@ndzh.com> wrote: > > Jeff: > > I'm really trying to answer your question - so if I do not understand your > question. I'll try again. > > The BGP transport sessions can have policy that requires the BGP hello to > be > exchanged across a L3 connection running on a particular MPLS interface. > This policy ties down the TCP to a specific L3 connection on a specific > L2.5 > connection. This example, show the benefit for some overlay/underlay > deployments. > > How does it impact the BGP FSM? You will not get an TCP connection up due > to machine policy (it is reject except for the l3 connection attached to > specific MPLS interface). > > I really hope I've understood your question. > > Sue > > > -----Original Message----- > From: Jeffrey Haas [mailto:jhaas@pfrc.org] > Sent: Sunday, March 20, 2022 2:39 PM > To: Susan Hares > Cc: 'Minto Jeyananth'; idr@ietf.org; > draft-minto-idr-bgp-autodiscovery@ietf.org > Subject: Re: [Idr] BGP autoconfiguration - > draft-minto-idr-bgp-autodiscovery > > Sue, > > I'm asking a very specific question. Let me repeat: > > On Sun, Mar 20, 2022 at 02:33:56PM -0400, Susan Hares wrote: > > You asked L3DN is useful where besides the DC. > > No, I asked: > > > It is still unclear what the "encapsulation" fields are used for with > > > respect to BGP discovery. > > > I am looking for the same level of answer from the draft-minto-*. Are > they > > planning to use this for WAN BGP auto-configuration. > > I'm not speaking for them. Minto or Shiva can commment on their draft. > > > On the encapsulation, as Randy has said AFI/SAFI. Consider a data > center > > with multiple overlays (L2, mpls, L3) and AFI/SAFIs. Suppose, you want > to > > use an MPLS interface for an L3 connections. You might want to select a > > specific set of labels for the underlay for L3DN. > > That's still not clear. > > How is this used to setup BGP's transport session during discovery? > I.e. how does this impact BGP's TCP SYN and the rest of the session? > > -- Jeff > > _______________________________________________ > Idr mailing list > Idr@ietf.org > https://www.ietf.org/mailman/listinfo/idr > >
- [Idr] BGP autoconfiguration - draft-minto-idr-bgp… Jeffrey Haas
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Minto Jeyananth
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Susan Hares
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Jeffrey Haas
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Susan Hares
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Jeffrey Haas
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Susan Hares
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Jeffrey Haas
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Randy Bush
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Randy Bush
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Susan Hares
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Robert Raszuk
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Susan Hares
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Robert Raszuk
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Minto Jeyananth
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Minto Jeyananth
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Susan Hares
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Susan Hares
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Minto Jeyananth
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Susan Hares
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Minto Jeyananth
- Re: [Idr] BGP autoconfiguration - draft-minto-idr… Susan Hares