--- /dev/null
+module ietf-network-topology {
+ yang-version 1;
+ namespace "urn:ietf:params:xml:ns:yang:ietf-network-topology";
+ prefix lnk;
+
+ import ietf-inet-types {
+ prefix inet;
+ }
+ import ietf-network {
+ prefix nd;
+ }
+
+ organization "TBD";
+ contact
+ "WILL-BE-DEFINED-LATER";
+ description
+ "This module defines a common base model for network topology,
+ augmenting the base network model with links to connect nodes,
+ as well as termination points to terminate links on nodes.";
+
+ revision 2015-06-08 {
+ description
+ "Initial revision.";
+ reference "draft-ietf-i2rs-yang-network-topo-01";
+ }
+
+ typedef link-id {
+ type inet:uri;
+ description
+ "An identifier for a link in a topology.
+ The identifier may be opaque.
+ The identifier SHOULD be chosen such that the same link in a
+ real network topology will always be identified through the
+ same identifier, even if the model is instantiated in
+ separate datastores. An implementation MAY choose to capture
+ semantics in the identifier, for example to indicate the type
+ of link and/or the type of topology that the link is a part
+ of.";
+ }
+
+ typedef tp-id {
+ type inet:uri;
+ description
+ "An identifier for termination points on a node.
+ The identifier may be opaque.
+ The identifier SHOULD be chosen such that the same TP in a
+ real network topology will always be identified through the
+ same identifier, even if the model is instantiated in
+ separate datastores. An implementation MAY choose to capture
+ semantics in the identifier, for example to indicate the type
+ of TP and/or the type of node and topology that the TP is a
+ part of.";
+ }
+
+ grouping link-ref {
+ description
+ "References a link in a specific network.";
+ leaf link-ref {
+ type leafref {
+ path "/nd:network[nd:network-id=current()/../"+
+ "nd:network-ref]/link/link-id";
+ }
+ description
+ "A type for an absolute reference a link instance.
+ (This type should not be used for relative references.
+ In such a case, a relative path should be used instead.)";
+ }
+ uses nd:network-ref;
+ }
+
+ grouping tp-ref {
+ description
+ "References a termination point in a specific node.";
+ leaf tp-ref {
+ type leafref {
+ path "/nd:network[nd:network-id=current()/../"+
+ "nd:network-ref]/nd:node[nd:node-id=current()/../"+
+ "nd:node-ref]/termination-point/tp-id";
+ }
+ description
+ "A type for an absolute reference to a termination point.
+ (This type should not be used for relative references.
+ In such a case, a relative path should be used instead.)";
+ }
+ uses nd:node-ref;
+ }
+
+ augment "/nd:network" {
+ description
+ "Add links to the network model.";
+ list link {
+ key "link-id";
+ description
+ "A Network Link connects a by Local (Source) node and
+ a Remote (Destination) Network Nodes via a set of the
+ nodes' termination points.
+ As it is possible to have several links between the same
+ source and destination nodes, and as a link could
+ potentially be re-homed between termination points, to
+ ensure that we would always know to distinguish between
+ links, every link is identified by a dedicated link
+ identifier.
+ Note that a link models a point-to-point link, not a
+ multipoint link.
+ Layering dependencies on links in underlay topologies are
+ not represented as the layering information of nodes and of
+ termination points is sufficient.";
+ container source {
+ description
+ "This container holds the logical source of a particular
+ link.";
+ leaf source-node {
+ type leafref {
+ path "../../../nd:node/nd:node-id";
+ }
+ mandatory true;
+ description
+ "Source node identifier, must be in same topology.";
+ }
+ leaf source-tp {
+ type leafref {
+ path "../../../nd:node[nd:node-id=current()/../"+
+ "source-node]/termination-point/tp-id";
+ }
+ description
+ "Termination point within source node that terminates
+ the link.";
+ }
+ }
+ container destination {
+ description
+ "This container holds the logical destination of a
+ particular link.";
+ leaf dest-node {
+ type leafref {
+ path "../../../nd:node/nd:node-id";
+ }
+ mandatory true;
+ description
+ "Destination node identifier, must be in the same
+ network.";
+ }
+ leaf dest-tp {
+ type leafref {
+ path "../../../nd:node[nd:node-id=current()/../"+
+ "dest-node]/termination-point/tp-id";
+ }
+ description
+ "Termination point within destination node that
+ terminates the link.";
+ }
+ }
+ leaf link-id {
+ type link-id;
+ description
+ "The identifier of a link in the topology.
+ A link is specific to a topology to which it belongs.";
+ }
+ list supporting-link {
+ key "network-ref link-ref";
+ description
+ "Identifies the link, or links, that this link
+ is dependent on.";
+ leaf network-ref {
+ type leafref {
+ path "../../../nd:supporting-network/nd:network-ref";
+ }
+ description
+ "This leaf identifies in which underlay topology
+ supporting link is present.";
+ }
+ leaf link-ref {
+ type leafref {
+ path "/nd:network[nd:network-id=current()/.."+
+ "/network-ref]/link/link-id";
+ }
+ description
+ "This leaf identifies a link which is a part
+ of this link's underlay. Reference loops, in which
+ a link identifies itself as its underlay, either
+ directly or transitively, are not allowed.";
+ }
+ }
+ }
+ }
+ augment "/nd:network/nd:node" {
+ description
+ "Augment termination points which terminate links.
+ Termination points can ultimately be mapped to interfaces.";
+ list termination-point {
+ key "tp-id";
+ description
+ "A termination point can terminate a link.
+ Depending on the type of topology, a termination point
+ could, for example, refer to a port or an interface.";
+ leaf tp-id {
+ type tp-id;
+ description
+ "Termination point identifier.";
+ }
+ list supporting-termination-point {
+ key "network-ref node-ref tp-ref";
+ description
+ "The leaf list identifies any termination points that
+ the termination point is dependent on, or maps onto.
+ Those termination points will themselves be contained
+ in a supporting node.
+ This dependency information can be inferred from
+ the dependencies between links. For this reason,
+ this item is not separately configurable. Hence no
+ corresponding constraint needs to be articulated.
+ The corresponding information is simply provided by the
+ implementing system.";
+ leaf network-ref {
+ type leafref {
+ path "../../../nd:supporting-node/nd:network-ref";
+ }
+ description
+ "This leaf identifies in which topology the
+ supporting termination point is present.";
+ }
+ leaf node-ref {
+ type leafref {
+ path "../../../nd:supporting-node/nd:node-ref";
+ }
+ description
+ "This leaf identifies in which node the supporting
+ termination point is present.";
+ }
+ leaf tp-ref {
+ type leafref {
+ path "/nd:network[nd:network-id=current()/../"+
+ "network-ref]/nd:node[nd:node-id=current()/../"+
+ "node-ref]/termination-point/tp-id";
+ }
+ description
+ "Reference to the underlay node, must be in a
+ different topology";
+ }
+ }
+ }
+ }
+}
Code Review / transportpce.git / blobdiff