Re: [mpls] Structure of draft-ietf-mpls-static-yang
tom petch <ietfc@btconnect.com> Tue, 13 November 2018 17:19 UTC
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From: tom petch <ietfc@btconnect.com>
To: "Tarek Saad (tsaad)" <tsaad@cisco.com>, mpls <mpls@ietf.org>
CC: "draft-ietf-mpls-base-yang@ietf.org" <draft-ietf-mpls-base-yang@ietf.org>
Thread-Topic: Structure of draft-ietf-mpls-static-yang
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Date: Tue, 13 Nov 2018 17:19:34 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/caplQSiZ6q6ejoS9025a9ttRv4M>
Subject: Re: [mpls] Structure of draft-ietf-mpls-static-yang
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----- Original Message ----- From: "Tarek Saad (tsaad)" <tsaad@cisco.com> Sent: Tuesday, November 13, 2018 4:31 PM > Hi Tom, > > Thanks. To me, RIP/OSPF/PIM/BGP are all control plane protocols and would think should exist below /routing/control-plane-protocols. > MPLS on the contrary is a forwarding augmentation to existing V4/V6 routing table(s) (which are already defined at path /routing/ribs/rib/routes/route/next-hop ) - the MPLS augmentation carries additional mpls specific data. > There are signaling control plane protocols specific to exchange MPLS labels (e.g. RSVP-TE, LDP) which I expect will exist at /routing/control-plane-protocols/control-plane-protocol (e.g. draft-ietf-teas-yang-rsvp) Tarek Yes, so BGP is out of line, but that is a problem for another WG. The MPLS quirks are IMHO twofold. Why define an address family? I always think of AFI/SAFI when someone says address family and I do not see MPLS figuring in that context. Second, what are MPLS and MPLStunnel doing in the Interface Table? Ok, they are a carry over from the MIB but do they have any role here? I am fishing for some 'when' (or if-feature) statements alongside the 'augment' to make the augment conditional (although perhaps not as many as TEAS created:-). Instinctively I feel there should be something as e.g. OSPF has although accepting your point about MPLS not being a protocol; but then mpls-ldp is a protocol but has no conditionals that I can see. At a slight tangent, I see in OSPF and others references such as container mpls { description "OSPF MPLS config state."; container te-rid { if-feature te-rid; ie conditional but not on MPLS per se. Tom Petch > Regards, > Tarek > > -----Original Message----- > From: tom petch <ietfc@btconnect.com> > Date: Tuesday, November 13, 2018 at 7:37 AM > To: Tarek Saad <tsaad@cisco.com>, mpls <mpls@ietf.org> > Cc: "draft-ietf-mpls-base-yang@ietf.org" <draft-ietf-mpls-base-yang@ietf.org> > Subject: Structure of draft-ietf-mpls-static-yang > > I wonder if the IETF has yet worked out how to model routing protocols. > I asked, what is MPLS? Looking at various modules, I see > > RIP > augment /routing/control-plane-protocols/control-plane-protocol: > +--rw rip > +--rw interfaces > > OSPF > augment /routing/control-plane-protocols/control-plane-protocol: > +--rw ospf > +--rw areas > | +--rw area* [area-id] > | +--rw interfaces > > the other IxxxGP > module: ietf-ixxx > augment /routing/ribs/rib/routes/route: > +--ro route-type? enumeration > augment /interfaces/interface: > +--rw clns-mtu? uint16 > augment /routing/control-plane-protocols/:control-plane-protocol: > +--rw ixxx > +--rw enable? boolean {admin-control}? > +--rw system-id? system-id > +--rw area-address* area-address > > BGP > augment "/routing-policy/defined-sets" > module ietf-bgp { > +--rw bgp! > +--rw global > +--rw afi-safis > +--rw afi-safi* [afi-safi-name] > +--rw ipv4-unicast > +--rw ipv6-unicast > +--rw l3vpn-ipv4-unicast > > PIM > module: ietf-pim-base > augment /routing/control-plane-protocols: > +--rw pim! > +--rw address-family* [address-family] > | +--rw address-family identityref > | +--rw <per address family configuration> > +--rw interfaces > +--rw interface* [name] > +--rw name if:interface-ref > +--rw address-family* [address-family] > > MPLS > > module: ietf-mpls > augment /rt:routing: > +--rw mpls > augment /routing/ribs/rib/routes/:route: > +--ro local-label? rt-types:mpls-label > augment > /routing/ribs/rib/routes/route/next-hop/next-hop-options/simple-next-hop > : > .... > identity mpls { base address-family; > > Different! which is right? Perhaps none of them. It is very early days > for routing YANG modules, no RFC, limited experience. I am mindful that > it took several years after the publication of the initial system YANG > modules for the advent of NDMA - a radically different approach - so > perhaps in a few years we will be looking at the routing modules and say > it needs a different approach. Sigh > > Tom Petch > > > >
- [mpls] I-D Action: draft-ietf-mpls-static-yang-05… internet-drafts
- Re: [mpls] I-D Action: draft-ietf-mpls-static-yan… t.petch
- Re: [mpls] I-D Action: draft-ietf-mpls-static-yan… Tarek Saad (tsaad)
- Re: [mpls] I-D Action: draft-ietf-mpls-static-yan… Tarek Saad (tsaad)
- Re: [mpls] I-D Action: draft-ietf-mpls-static-yan… tom petch
- Re: [mpls] I-D Action: draft-ietf-mpls-static-yan… tom petch
- [mpls] Structure of draft-ietf-mpls-static-yang tom petch
- Re: [mpls] Structure of draft-ietf-mpls-static-ya… Tarek Saad (tsaad)
- Re: [mpls] Structure of draft-ietf-mpls-static-ya… tom petch
- Re: [mpls] Structure of draft-ietf-mpls-static-ya… Tarek Saad (tsaad)
- Re: [mpls] Structure of draft-ietf-mpls-static-ya… tom petch
- Re: [mpls] Structure of draft-ietf-mpls-static-ya… tom petch