+++ /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