HC2VPP-288 - add SRv6 module (writers only)

Changes:
- add new module for SRv6
- add models for SRv6 configuration:
  from https://datatracker.ietf.org/doc/draft-raza-spring-srv6-yang/
   - hc2vpp-ietf-srv6-base@2018-03-01.yang
   - hc2vpp-ietf-srv6-static@2018-03-01.yang
   - ietf-srv6-types@2018-03-01.yang
- implements Configuration of local sids and their end functions.
- implements support for FIB table management (HC2VPP-345)

Models hc2vpp-ietf-srv6-base and hc2vpp-ietf-srv6-static
are changed (HC2VPP-332):
 - imports for routing models (HC2VPP-298)
 - presence in end function containers was added to fix
   mandatory child verification if parent container is not present

Change-Id: Ib74e48023b671383f076b84773e26ce7c5ae282a
Signed-off-by: Michal Cmarada <michal.cmarada@pantheon.tech>
Signed-off-by: Jan Srnicek <jan.srnicek@pantheon.tech>

6 files changed, 2237 insertions, 0 deletions

diff --git a/srv6/srv6-api/asciidoc/Readme.adoc b/srv6/srv6-api/asciidoc/Readme.adoc
new file mode 100644
index 000000000..3c378954d
--- /dev/null
+++ b/srv6/srv6-api/asciidoc/Readme.adoc
@@ -0,0 +1,15 @@
+= srv6-api
+
+SRv6 API consists of models obtained
+from https://datatracker.ietf.org/doc/draft-raza-spring-srv6-yang/[draft-raza-spring-srv6-yang]:
+
+- `hc2vpp-ietf-srv6-base@2018-03-01.yang`
+- `hc2vpp-ietf-srv6-static@2018-03-01.yang`
+- `ietf-srv6-types@2018-03-01.yang`
+
+Models *hc2vpp-ietf-srv6-base* and *hc2vpp-ietf-srv6-static*
+are changed (https://jira.fd.io/browse/HC2VPP-332[HC2VPP-332]):
+
+ - imports for routing models (https://jira.fd.io/browse/HC2VPP-298[HC2VPP-298])
+ - presence in end function containers was added to fix
+   mandatory child verification if parent container is not present
diff --git a/srv6/srv6-api/pom.xml b/srv6/srv6-api/pom.xml
new file mode 100644
index 000000000..c20c43234
--- /dev/null
+++ b/srv6/srv6-api/pom.xml
@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ Copyright (c) 2018 Bell Canada, Pantheon Technologies and/or its affiliates.
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at:
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>io.fd.hc2vpp.common</groupId>
+        <artifactId>api-parent</artifactId>
+        <version>1.18.07-SNAPSHOT</version>
+        <relativePath>../../common/api-parent</relativePath>
+    </parent>
+
+    <groupId>io.fd.hc2vpp.srv6</groupId>
+    <artifactId>srv6-api</artifactId>
+    <name>${project.artifactId}</name>
+    <version>1.18.07-SNAPSHOT</version>
+    <packaging>bundle</packaging>
+
+    <dependencies>
+        <dependency>
+            <groupId>io.fd.hc2vpp.routing</groupId>
+            <artifactId>routing-api</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.fd.hc2vpp.fib.management</groupId>
+            <artifactId>fib-management-api</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.opendaylight.mdsal.model</groupId>
+            <artifactId>ietf-yang-types-20130715</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.opendaylight.mdsal.model</groupId>
+            <artifactId>ietf-inet-types-2013-07-15</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.opendaylight.mdsal.model</groupId>
+            <artifactId>ietf-interfaces</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.opendaylight.mdsal.model</groupId>
+            <artifactId>yang-ext</artifactId>
+        </dependency>
+    </dependencies>
+</project>
diff --git a/srv6/srv6-api/src/main/yang/hc2vpp-ietf-srv6-base@2018-03-01.yang b/srv6/srv6-api/src/main/yang/hc2vpp-ietf-srv6-base@2018-03-01.yang
new file mode 100644
index 000000000..4d41b4566
--- /dev/null
+++ b/srv6/srv6-api/src/main/yang/hc2vpp-ietf-srv6-base@2018-03-01.yang
@@ -0,0 +1,666 @@
+module hc2vpp-ietf-srv6-base {
+
+  namespace "urn:ietf:params:xml:ns:yang:ietf-srv6-base";
+  prefix srv6;
+
+  import ietf-interfaces {
+    prefix "if";
+  }
+
+  import ietf-inet-types {
+    prefix inet;
+  }
+
+  import ietf-yang-types {
+    prefix "yang";
+  }
+
+  // TODO: hc2vpp-298 - Renamed imports, because hc2vpp uses modified versions of these models.
+  import hc2vpp-ietf-routing-types {
+     prefix "rt-types";
+  }
+
+
+  // TODO: hc2vpp-298 - Renamed imports, because hc2vpp uses modified versions of these models.
+  import hc2vpp-ietf-routing {
+    prefix "rt";
+  }
+
+  import ietf-srv6-types {
+    prefix srv6-types;
+  }
+
+  organization
+    "IETF SPRING Working Group";
+  contact
+      "WG Web:   <http://tools.ietf.org/wg/spring/>
+     WG List:  <mailto:spring@ietf.org>
+
+     Editor:   Kamran Raza
+               <mailto:skraza@cisco.com>
+
+     Editor:   Jaganbabu Rajamanickam
+               <maito:jrajaman@cisco.com>
+
+     Editor:   Xufeng Liu
+               <mailto:Xufeng_Liu@jabil.com>
+
+     Editor:   Zhibo Hu
+               <mailto:huzhibo@huawei.com>
+
+     Editor:   Iftekhar Hussain
+               <mailto:IHussain@infinera.com>
+
+     Editor:   Himanshu Shah
+               <mailto:hshah@ciena.com>
+
+     Editor:   Daniel Voyer
+               <mailto:daniel.voyer@bell.ca>
+
+     Editor:   Hani Elmalky
+               <mailto:hani.elmalky@ericsson.com>
+
+     Editor:   Satoru Matsushima
+               <mailto:satoru.matsushima@gmail.com>
+
+     Editor:   Katsuhiro Horiba
+               <mailto:katsuhiro.horiba@g.softbank.co.jp>
+
+     Editor:   Ahmed AbdelSalam
+               <mailto:ahmed.abdelsalam@gssi.it>
+
+     ";
+
+  description
+    "This YANG module defines the essential elements for the
+     management of Segment-Routing with IPv6 dataplane (SRv6).
+
+     Copyright (c) 2017 IETF Trust and the persons identified as
+     authors of the code.  All rights reserved.
+
+     Redistribution and use in source and binary forms, with or
+     without modification, is permitted pursuant to, and subject
+     to the license terms contained in, the Simplified BSD License
+     set forth in Section 4.c of the IETF Trust's Legal Provisions
+     Relating to IETF Documents
+     (http://trustee.ietf.org/license-info).";
+
+  reference "RFC XXXX";
+
+  revision 2018-03-01 {
+    description
+      "Updated to align with SRv6 network programming draft rev 04";
+    reference
+      "RFC XXXX: YANG Data Model for SRv6";
+      }
+
+  revision 2017-11-12 {
+    description
+      "Initial revision.";
+    reference
+      "RFC XXXX: YANG Data Model for SRv6";
+  }
+
+/*
+ * Common
+ */
+
+  grouping path-attrs-cmn {
+     description
+       "Path properties -common for v4/v6";
+
+     leaf weight {
+       type uint32;
+       description
+         "This value is used to compute a loadshare to perform un-equal
+          load balancing when multiple outgoing path(s) are specified. A
+          share is computed as a ratio of this number to the total under
+          all configured path(s).";
+     }
+
+     leaf role {
+
+       type enumeration {
+         enum PRIMARY { description "Path as primary traffic carrying"; }
+         enum BACKUP { description "Path acts as a backup"; }
+         enum PRIMARY_AND_BACKUP { description
+                    "Path acts as primary and backup simultaneously"; }
+        }
+         description "The path role";
+      }
+
+      leaf backup-path-index {
+       type uint8;
+       description "Index of the protecting (backup) path";
+      }
+   }
+
+  grouping path-out-sids {
+    description "Grouping for path's SID stack";
+
+      list out-sid {
+        key "sid";
+        description "Out SID";
+
+        leaf sid {
+          type srv6-types:srv6-sid;
+          description "SID value";
+        }
+      }
+
+  }
+
+  grouping path-out-labels {
+    description "Grouping for path's label stack";
+
+      list out-label {
+        key "label";
+        description "Out label";
+
+        leaf label {
+          type rt-types:mpls-label;
+          description "Label value";
+        }
+      }
+
+  }
+
+ /*
+  * Config and State
+  */
+
+  grouping srv6-encap {
+   description "Grouping for encap param config.";
+
+   container encapsulation {
+      description "Configure encapsulation related parameters";
+      leaf source-address {
+        type inet:ipv6-address;
+        description "Specify a source address (for T.Encap). The address must locally exists
+                     and be routable";
+      }
+      leaf ip-ttl-propagation {
+        type boolean;
+        default false;
+        description "IP TTL propagation from encapsulated packet to encapsulating outer
+                     IPv6 header. When configured on decapsulation side, this refers to
+                     propagating IP TTL from outer IPv6 header to inner header after decap";
+      }
+
+    }
+  }
+
+  grouping srv6-locator-state {
+   description "SRv6 grouping Locastateor ";
+
+       leaf operational-status {
+         type srv6-types:srv6-status-type;
+         config false;
+         description "Indicates whether locator state is UP";
+       }
+
+       leaf is-in-address-conflict {
+         type boolean;
+         config false;
+         description "Indicates whether locator address conflicts with
+                      some other IPv6 address on the box";
+       }
+    }
+
+  grouping srv6-locators {
+   description "SRv6 locator grouping";
+
+   container locators {
+      description "SRv6 locators";
+
+      list locator {
+        key "name";
+        description "Configure a SRv6 locator";
+
+
+        leaf name {
+          type string;
+          description "Locator name";
+        }
+
+        leaf enable {
+          type boolean;
+          default false;
+          description "Enable a SRv6 locator";
+        }
+        leaf is-default {
+          type boolean;
+          mandatory true;
+          description "Indicates if the locator is a default locator";
+        }
+
+        container prefix {
+          description "Specify locator prefix value";
+          leaf address {
+            type inet:ipv6-address;
+            mandatory true;
+            description "IPv6 address";
+          }
+          leaf length {
+            type srv6-types:srv6-locator-len;
+            mandatory true;
+            description "Locator (prefix) length";
+          }
+        }
+        uses srv6-locator-state;
+      }
+    }
+  }
+
+  grouping srv6-stats-in {
+    description "Grouping for inbound stats";
+
+      leaf in-pkts {
+        type yang:counter64;
+        description
+          "A cumulative counter of the total number of packets received";
+      }
+
+      leaf in-octets {
+        type yang:counter64;
+        description
+          "A cumulative counter of the total bytes received.";
+      }
+
+  }
+
+  grouping srv6-stats-out {
+    description "Grouping for inbound stats";
+
+      leaf out-pkts {
+        type yang:counter64;
+        description
+          "A cumulative counter of the total number of packets transmitted";
+      }
+
+      leaf out-octets {
+        type yang:counter64;
+        description
+          "A cumulative counter of the total bytes transmitted.";
+      }
+  }
+
+  grouping path-out-sids-choice {
+    description "Grouping for Out-SID choices";
+    choice encap-type {
+       description "Out-SID encap-based choice";
+       case srv6 {
+         uses path-out-sids;
+       }
+       case mpls {
+         uses path-out-labels;
+       }
+    }
+  }
+
+  grouping local-sid-fwd-state {
+    description "SRv6 local-SID forwarding state grouping";
+
+    container forwarding {
+       description "SRv6 local-SID forwarding state";
+
+       leaf is-installed {
+         type boolean;
+         description "Indicates whether SID is installed in forwarding";
+       }
+
+       leaf next-hop-type {
+         type srv6-types:srv6-nexthop-type;
+         description "Forwarding next-hop types";
+       }
+
+       container paths {
+
+         when "../is-installed = 'true'" {
+           description "This container is valid only when the local-SID is installed
+               in forwarding";
+         }
+
+         list path {
+          key path-index;
+          description "The list of paths associated with the SID";
+
+          leaf path-index {
+            type uint8;
+            description "Index of the path";
+          }
+
+          container l2 {
+            when "../../../next-hop-type = 'l2'" {
+              description "This container is valid only for L2 type of NHs";
+            }
+
+            leaf interface {
+              type if:interface-ref;
+               description "The outgoing Layer2 interface";
+            }
+
+            description "L2 information";
+          }
+
+          container l3 {
+            when "../../../next-hop-type != 'l2'" {
+              description "This container is valid only for L3 type of NHs";
+            }
+
+            leaf interface {
+              type if:interface-ref;
+               description "The outgoing Layer3 interface";
+            }
+
+            leaf next-hop {
+              type inet:ip-address;
+              description "The IP address of the next-hop";
+            }
+
+            uses path-attrs-cmn;
+
+            description "L3 information";
+          }
+          uses path-out-sids-choice;
+        }
+
+        description "Forwarding paths";
+       }
+    }
+  }
+
+  grouping srv6-state-sid {
+   description "SRv6 SID state grouping";
+
+   container local-sids {
+     config false;
+     description "Local-SID state";
+
+     container counters {
+         description "SRv6 counters";
+
+         container cnt3 {
+           description "Counts SRv6 traffic received/dropped on local prefix not instantiated as local-SID";
+           uses srv6-stats-in;
+         }
+     }
+
+     list local-sid {
+       key "sid";
+       description "Per-localSID Counters";
+
+       leaf sid {
+        type srv6-types:srv6-sid;
+        description "Local SID value";
+       }
+
+       uses srv6-locator-ref;
+
+       leaf is-reserved {
+         type boolean;
+         description "Set to true if SID comes from reserved pool";
+       }
+
+       leaf end-behavior-type {
+           type identityref {
+             base srv6-types:srv6-endpoint-type;
+           }
+           description "Type of SRv6 end behavior.";
+       }
+
+       leaf alloc-type {
+        type srv6-types:sid-alloc-type;
+        description
+          "Type of sid allocation.";
+
+       }
+
+       list owner {
+         key "type instance";
+         description "SID Owner clients";
+         leaf type {
+           type identityref {
+             base srv6-types:srv6-sid-owner-type;
+           }
+           description "SID owner/client type";
+         }
+         leaf instance {
+           type string;
+           description "Client instance";
+         }
+         leaf is-winner {
+           type boolean;
+           description "Is this client/owner the winning in terms of forwarding";
+         }
+       }
+
+       uses local-sid-fwd-state;
+
+       container counters {
+         description "SRv6 per local-SID counters";
+
+         container cnt1 {
+           description "Counts SRv6 traffic received on local-SID prefix and processed successfully";
+           uses srv6-stats-in;
+         }
+       }
+    }
+   }
+  }
+
+  grouping srv6-support-ends {
+    description "SRv6 End behavior support grouping";
+
+   list end-behavior {
+     key "type";
+     description "End behavior support";
+
+     leaf type {
+       type identityref {
+         base srv6-types:srv6-endpoint-type;
+       }
+       description "End behavior (End*) type";
+     }
+
+     leaf supported {
+       type boolean;
+       mandatory true;
+       description "True if supported";
+     }
+    }
+   }
+
+  grouping srv6-support-transits {
+    description "SRv6 Transit behavior support grouping";
+
+   list transit-behavior {
+     key "type";
+     description "Transit behavior support";
+
+     leaf type {
+       type srv6-types:srv6-transit-type;
+       description "Transit behavior (T*) type";
+     }
+     leaf supported {
+       type boolean;
+       mandatory true;
+       description "True if supported";
+     }
+    }
+   }
+
+  grouping srv6-support-signaled {
+    description "SRv6 signaled parameter support grouping";
+
+   container signaled-parameters {
+     description "SRv6 signaled parameter support";
+
+     leaf max-sl {
+       type uint8;
+       //mandatory true;
+       description "Maximum value of the SL field in the SRH of
+                    a received packet before applying the function
+                    associated with a SID";
+     }
+     leaf max-end-pop-srh {
+       type uint8;
+       //mandatory true;
+       description "Maximum number of SIDs in the top SRH in an
+                    SRH stack to which the router can apply
+                    PSP or USP flavors";
+     }
+     leaf max-t_insert {
+
+       type uint8;
+       //mandatory true;
+       description "Maximum number of SIDs that can be inserted as
+                   part of the T.insert behavior";
+     }
+     leaf max-t_encap {
+       type uint8;
+       //mandatory true;
+       description "Maximum number of SIDs that can be inserted as
+                    part of the T.Encap behavior";
+     }
+     leaf max-end_d {
+       type uint8;
+       //mandatory true;
+       description "Maximum number of SIDs in an SRH when applying
+                    End.DX6 and End.DT6 functions";
+     }
+    }
+  }
+
+  grouping srv6-support-security-rules {
+    description "SRv6 Security rules grouping";
+
+   list security-rule {
+     key "type";
+     description "Security rule support";
+
+     leaf type {
+       type srv6-types:srv6-security-rule-type;
+       description "Security rule type";
+     }
+     leaf supported {
+       type boolean;
+       mandatory true;
+       description "True if supported";
+     }
+    }
+   }
+
+  grouping srv6-support-counters {
+    description "SRv6 Counters grouping";
+
+   list counters {
+     key "type";
+     description "SRv6 counter support";
+
+     leaf type {
+       type srv6-types:srv6-counter-type;
+
+       description "Counter type";
+     }
+     leaf supported {
+       type boolean;
+       mandatory true;
+       description "True if supported";
+     }
+    }
+   }
+
+   grouping srv6-state-capabilities {
+     description "SRv6 node capabilities grouping";
+     container node-capabilities {
+       config false;
+       description "Node's SRv6 capabilities";
+
+       uses srv6-support-ends;
+       uses srv6-support-transits;
+       uses srv6-support-signaled;
+       uses srv6-support-security-rules;
+       uses srv6-support-counters;
+     }
+  }
+
+  augment "/rt:routing" {
+     description
+      "This augments routing-instance configuration with segment-routing SRv6.";
+
+   container srv6 {
+    description "Segment Routing with IPv6 dataplane";
+
+    /* config */
+    leaf enable {
+      type boolean;
+      default false;
+      description "Enable SRv6";
+    }
+
+    uses srv6-encap;
+    uses srv6-locators;
+    uses srv6-state-capabilities;
+    uses srv6-state-sid;
+   }
+ }
+
+ /* Notifications */
+
+  grouping srv6-locator-ref {
+
+    description
+      "An absolute reference to an SRv6 locator";
+    leaf locator-ref {
+      type leafref {
+        path "/rt:routing/srv6:srv6/srv6:locators/srv6:locator/srv6:name";
+      }
+      description
+        "Reference to a SRv6 locator.";
+    }
+  }
+
+  notification srv6-locator-status-event {
+    description
+      "Notification event for a change of SRv6 locator operational status.";
+    leaf operational-status {
+      type srv6-types:srv6-status-type;
+      description "Operational status";
+    }
+    uses srv6-locator-ref;
+  }
+
+  notification srv6-sid-collision-event {
+    description
+      "Notification event for an SRv6 SID collision - i.e., attempt to bind an already
+       bound SID to a new context";
+    leaf sid {
+      type srv6-types:srv6-sid;
+      description "SRv6 SID";
+    }
+    container existing {
+      description "Current assignment / bind";
+      leaf end-behavior-type {
+        type identityref {
+          base srv6-types:srv6-endpoint-type;
+        }
+        description "End type";
+      }
+      // TODO: More
+    }
+    container requested {
+      description "Requested assignment / bind";
+
+      leaf end-behavior-type {
+        type identityref {
+          base srv6-types:srv6-endpoint-type;
+        }
+        description "End type";
+      }
+
+    }
+
+    }
+
+} // module
diff --git a/srv6/srv6-api/src/main/yang/hc2vpp-ietf-srv6-static@2018-03-01.yang b/srv6/srv6-api/src/main/yang/hc2vpp-ietf-srv6-static@2018-03-01.yang
new file mode 100644
index 000000000..3ba936688
--- /dev/null
+++ b/srv6/srv6-api/src/main/yang/hc2vpp-ietf-srv6-static@2018-03-01.yang
@@ -0,0 +1,832 @@
+module hc2vpp-ietf-srv6-static {
+
+  namespace "urn:ietf:params:xml:ns:yang:ietf-srv6-static";
+  prefix srv6-static;
+
+  import ietf-interfaces {
+    prefix "if";
+  }
+
+  import ietf-inet-types {
+    prefix inet;
+  }
+
+  // TODO: hc2vpp-298 - Renamed imports, because hc2vpp uses modified versions of these models.
+  import hc2vpp-ietf-routing {
+    prefix "rt";
+  }
+
+  import ietf-srv6-types {
+    prefix srv6-types;
+  }
+
+  // TODO: hc2vpp-332 - Renamed imports, because hc2vpp uses modified versions of these models.
+  import hc2vpp-ietf-srv6-base {
+    prefix srv6;
+  }
+
+  organization
+    "IETF SPRING Working Group";
+  contact
+    "WG Web:   <http://tools.ietf.org/wg/spring/>
+     WG List:  <mailto:spring@ietf.org>
+
+
+     Editor:   Kamran Raza
+               <mailto:skraza@cisco.com>
+
+     Editor:   Jaganbabu Rajamanickam
+               <maito:jrajaman@cisco.com>
+
+     Editor:   Xufeng Liu
+               <mailto:Xufeng_Liu@jabil.com>
+
+     Editor:   Zhibo Hu
+               <mailto:huzhibo@huawei.com>
+
+     Editor:   Iftekhar Hussain
+               <mailto:IHussain@infinera.com>
+
+     Editor:   Himanshu Shah
+               <mailto:hshah@ciena.com>
+
+     Editor:   Daniel Voyer
+               <mailto:daniel.voyer@bell.ca>
+
+     Editor:   Hani Elmalky
+               <mailto:hani.elmalky@ericsson.com>
+
+     Editor:   Satoru Matsushima
+               <mailto:satoru.matsushima@gmail.com>
+
+     Editor:   Katsuhiro Horiba
+               <mailto:katsuhiro.horiba@g.softbank.co.jp>
+
+     Editor:   Ahmed AbdelSalam
+               <mailto:ahmed.abdelsalam@gssi.it>
+
+     ";
+
+  description
+    "This YANG module defines the essential elements for the
+     management of Static application for Segment-Routing with
+     IPv6 dataplane (SRv6).
+
+     Copyright (c) 2017 IETF Trust and the persons identified as
+     authors of the code.  All rights reserved.
+
+     Redistribution and use in source and binary forms, with or
+     without modification, is permitted pursuant to, and subject
+     to the license terms contained in, the Simplified BSD License
+     set forth in Section 4.c of the IETF Trust's Legal Provisions
+     Relating to IETF Documents
+
+     (http://trustee.ietf.org/license-info).";
+
+  reference "RFC XXXX";
+
+  revision 2018-03-01 {
+    description
+      "Updated to align with SRv6 network programming draft rev 04";
+    reference
+      "RFC XXXX: YANG Data Model for SRv6";
+      }
+
+  revision 2017-11-12 {
+    description
+      "Initial revision.";
+    reference
+      "RFC XXXX: YANG Data Model for SRv6";
+  }
+
+ /*
+  * Config and State
+  */
+
+
+  grouping path-attrs-v6 {
+     description
+       "IPv6 Path properties";
+
+     leaf interface {
+        type if:interface-ref;
+        description "The outgoing interface";
+     }
+
+     leaf next-hop {
+       type inet:ipv6-address;
+       description "The IP address of the next-hop";
+     }
+
+    uses srv6:path-attrs-cmn;
+  }
+
+  grouping path-attrs-v4 {
+     description
+       "IPv4 Path properties";
+
+     leaf interface {
+        type if:interface-ref;
+        description "The outgoing interface";
+     }
+
+     leaf next-hop {
+       type inet:ipv4-address;
+       description "The IP address of the next-hop";
+     }
+
+    uses srv6:path-attrs-cmn;
+  }
+
+  grouping path-attrs-mpls {
+     description
+       "MPLS Path properties";
+
+     leaf interface {
+        type if:interface-ref;
+        description "The outgoing interface";
+     }
+
+     leaf next-hop {
+       type inet:ip-address;
+       description "The IP address of the next-hop";
+     }
+
+    uses srv6:path-attrs-cmn;
+  }
+
+  grouping multi-paths-v6 {
+    description "Multipath grouping";
+
+    container paths {
+      description "List of outgoing paths";
+      list path {
+        key path-index;
+        description "The list of paths associated with the SID";
+
+        leaf path-index {
+          type uint8;
+          description "Index of the path";
+        }
+
+        uses path-attrs-v6;
+        container encap {
+          description "Encapsulation on path";
+          uses srv6:path-out-sids;
+        }
+        }
+      }
+   }
+
+
+  grouping multi-paths-v4 {
+    description "Multipath grouping";
+
+    container paths {
+      description "List of outgoing paths";
+      list path {
+        key path-index;
+        description "The list of paths associated with the SID";
+
+        leaf path-index {
+          type uint8;
+          description "Index of the path";
+        }
+
+        uses path-attrs-v4;
+        container encap {
+          description "Encapsulation on path";
+          uses srv6:path-out-sids;
+        }
+       }
+     }
+   }
+
+  grouping multi-paths-mpls {
+    description "Multipath grouping";
+
+    container paths {
+      description "List of outgoing paths";
+      list path {
+        key path-index;
+        description "The list of paths associated with the SID";
+
+        leaf path-index {
+          type uint8;
+          description "Index of the path";
+        }
+
+        uses path-attrs-mpls;
+        container encap {
+          description "Encapsulation on path";
+          uses srv6:path-out-labels;
+        }
+       }
+      }
+   }
+
+  grouping srv6-sid-config {
+    description
+
+      "Configuration parameters relating to SRv6 sid.";
+
+    leaf opcode {
+      type srv6-types:srv6-func-opcode-unreserved;
+      description
+        "SRv6 function opcode.";
+    }
+    leaf end-behavior-type {
+      type identityref {
+        base srv6-types:srv6-endpoint-type;
+      }
+      mandatory true;
+      description
+        "Type of SRv6 end behavior.";
+    }
+
+    container end {
+      when "../end-behavior-type = 'End'" {
+        description
+          "This container is valid only when the user chooses End
+           behavior (variant: no PSP, no USP).";
+      }
+      description
+        "The Endpoint function is the most basic function.
+         FIB lookup on updated DA and forward accordingly
+         to the matched entry.
+         This is the SRv6 instantiation of a Prefix SID
+         (variant: no PSP, no USP)";
+
+    }
+
+    container end_psp {
+      when "../end-behavior-type = 'End_PSP'" {
+        description
+          "This container is valid only when the user chooses End
+           behavior (variant: PSP only).";
+      }
+      description
+        "The Endpoint function is the most basic function.
+         FIB lookup on updated DA and forward accordingly
+         to the matched entry.
+         This is the SRv6 instantiation of a Prefix SID
+         (variant: PSP only)";
+
+    }
+
+    container end_usp {
+      when "../end-behavior-type = 'End_USP'" {
+
+        description
+          "This container is valid only when the user chooses End
+           behavior (variant: USP only).";
+      }
+      description
+        "The Endpoint function is the most basic function.
+         FIB lookup on updated DA and forward accordingly
+         to the matched entry.
+         This is the SRv6 instantiation of a Prefix SID
+         (variant: USP only)";
+
+    }
+
+    container end_psp_usp {
+      when "../end-behavior-type = 'End_PSP_USP'" {
+        description
+          "This container is valid only when the user chooses End
+           behavior (variant: PSP/USP).";
+      }
+      description
+        "The Endpoint function is the most basic function.
+         FIB lookup on updated DA and forward accordingly
+         to the matched entry.
+         This is the SRv6 instantiation of a Prefix SID
+         (variant: PSP/USP)";
+
+    }
+
+    container end-t {
+      when "../end-behavior-type = 'End.T'" {
+        description
+          "This container is valid only when the user chooses
+           End.T behavior (variant: no PSP, no USP).";
+      }
+      description
+        "Endpoint with specific IPv6 table lookup (variant: no PSP, no USP).
+         Lookup the next segment in IPv6 table T
+         associated with the SID and forward via
+         the matched table entry.
+         The End.T is used for multi-table operation
+         in the core.";
+        // TODO: HC2VPP-332 - Uncommented presence in container so mandatory child is enforced
+        //       only when container is present. Caused by Yangtools not enforcing when statement (YANGTOOLS-688).
+        presence  "Mandatory child only if container is present";
+        leaf lookup-table-ipv6 {
+          type srv6-types:table-id;
+          mandatory true;
+          description
+            "Table Id for lookup on updated DA (next segment)";
+
+        }
+    }
+
+    container end-t_psp {
+      when "../end-behavior-type = 'End.T_PSP'" {
+        description
+          "This container is valid only when the user chooses
+           End.T behavior (variant: PSP only).";
+      }
+      description
+        "Endpoint with specific IPv6 table lookup (variant: PSP only).
+         Lookup the next segment in IPv6 table T
+         associated with the SID and forward via
+         the matched table entry.
+         The End.T is used for multi-table operation
+         in the core.";
+        // TODO: HC2VPP-332 - Uncommented presence in container so mandatory child is enforced
+        //       only when container is present. Caused by Yangtools not enforcing when statement (YANGTOOLS-688).
+        presence  "Mandatory child only if container is present";
+
+        leaf lookup-table-ipv6 {
+          type srv6-types:table-id;
+          mandatory true;
+          description
+            "Table Id for lookup on updated DA (next segment)";
+        }
+    }
+
+
+    container end-t_usp {
+      when "../end-behavior-type = 'End.T_USP'" {
+        description
+          "This container is valid only when the user chooses
+           End.T behavior (variant: USP only).";
+      }
+      description
+        "Endpoint with specific IPv6 table lookup (variant: USP only).
+         Lookup the next segment in IPv6 table T
+         associated with the SID and forward via
+         the matched table entry.
+         The End.T is used for multi-table operation
+         in the core.";
+        // TODO: HC2VPP-332 - Uncommented presence in container so mandatory child is enforced
+        //       only when container is present. Caused by Yangtools not enforcing when statement (YANGTOOLS-688).
+        presence  "Mandatory child only if container is present";
+
+        leaf lookup-table-ipv6 {
+          type srv6-types:table-id;
+          mandatory true;
+          description
+
+            "Table Id for lookup on updated DA (next segment)";
+        }
+    }
+
+    container end-t_psp_usp {
+      when "../end-behavior-type = 'End.T_PSP_USP'" {
+        description
+          "This container is valid only when the user chooses
+           End.T behavior (variant: USP/PSP).";
+      }
+      description
+        "Endpoint with specific IPv6 table lookup (variant: USP/PSP).
+         Lookup the next segment in IPv6 table T
+         associated with the SID and forward via
+         the matched table entry.
+         The End.T is used for multi-table operation
+         in the core.";
+        // TODO: HC2VPP-332 - Uncommented presence in container so mandatory child is enforced
+        //       only when container is present. Caused by Yangtools not enforcing when statement (YANGTOOLS-688).
+        presence  "Mandatory child only if container is present";
+
+        leaf lookup-table-ipv6 {
+          type srv6-types:table-id;
+          mandatory true;
+          description
+            "Table Id for lookup on updated DA (next segment)";
+        }
+    }
+
+   container end-x {
+      when "../end-behavior-type = 'End.X'" {
+        description
+          "This container is valid only when the user chooses
+           End.X behavior (variant: no USP/PSP)";
+      }
+      description
+        "Endpoint with cross-connect to an array of
+         layer-3 adjacencies (variant: no USP/PSP).
+         Forward to layer-3 adjacency bound to the SID S.
+         The End.X function is required to express any
+         traffic-engineering policy.";
+
+      leaf protected {
+        type boolean;
+        default false;
+        description "Is Adj-SID protected?";
+      }
+
+      uses multi-paths-v6;
+
+    }
+
+   container end-x_psp {
+      when "../end-behavior-type = 'End.X_PSP'" {
+        description
+          "This container is valid only when the user chooses
+           End.X behavior (variant: PSP only)";
+      }
+      description
+        "Endpoint with cross-connect to an array of
+         layer-3 adjacencies (variant: PSP only).
+         Forward to layer-3 adjacency bound to the SID S.
+         The End.X function is required to express any
+         traffic-engineering policy.";
+
+      leaf protected {
+        type boolean;
+        default false;
+        description "Is Adj-SID protected?";
+      }
+
+      uses multi-paths-v6;
+    }
+
+   container end-x_usp {
+      when "../end-behavior-type = 'End.X_USP'" {
+        description
+          "This container is valid only when the user chooses
+           End.X behavior (variant: USP only)";
+      }
+      description
+        "Endpoint with cross-connect to an array of
+         layer-3 adjacencies (variant: USP only).
+         Forward to layer-3 adjacency bound to the SID S.
+         The End.X function is required to express any
+         traffic-engineering policy.";
+
+      leaf protected {
+        type boolean;
+        default false;
+        description "Is Adj-SID protected?";
+      }
+
+      uses multi-paths-v6;
+    }
+
+   container end-x_psp_usp {
+      when "../end-behavior-type = 'End.X_PSP_USP'" {
+
+        description
+          "This container is valid only when the user chooses
+           End.X behavior (variant: PSP/USP)";
+      }
+      description
+        "Endpoint with cross-connect to an array of
+         layer-3 adjacencies (variant: PSP/USP).
+         Forward to layer-3 adjacency bound to the SID S.
+         The End.X function is required to express any
+         traffic-engineering policy.";
+
+      leaf protected {
+        type boolean;
+        default false;
+        description "Is Adj-SID protected?";
+      }
+
+      uses multi-paths-v6;
+    }
+
+
+    container end-b6 {
+      when "../end-behavior-type = 'End.B6'" {
+        description
+          "This container is valid only when the user chooses
+           End.B6 behavior.";
+      }
+      description
+        "Endpoint bound to an SRv6 Policy.
+         Insert SRH based on the policy and forward the
+         packet toward the first hop configured in the policy.
+         This is the SRv6 instantiation of a Binding SID.";
+      // TODO: HC2VPP-332 - Uncommented presence in container so mandatory child is enforced
+      //       only when container is present. Caused by Yangtools not enforcing when statement (YANGTOOLS-688).
+      presence  "Mandatory child only if container is present";
+
+      leaf policy-name {
+        type string;
+        mandatory true;
+        description "SRv6 policy name.";
+      }
+
+      uses multi-paths-v6;
+    }
+
+    container end-b6-encaps {
+      when "../end-behavior-type = 'End.B6.Encaps'" {
+        description
+          "This container is valid only when the user chooses
+
+           End_B6_Encaps behavior.";
+      }
+      description
+        "This is a variation of the End.B6 behavior where
+         the SRv6 Policy also includes an IPv6 Source
+         Address.
+         Insert SRH based on the policy and update the
+         source IP and forward the packet toward the
+         first hop configured in the policy.
+         Instead of simply inserting an SRH with the
+         policy (End.B6), this behavior also adds an
+         outer IPv6 header.";
+      // TODO: HC2VPP-332 - Uncommented presence in container so mandatory child is enforced
+      //       only when container is present. Caused by Yangtools not enforcing when statement (YANGTOOLS-688).
+      presence  "Mandatory child only if container is present";
+
+      leaf policy-name {
+        type string;
+        mandatory true;
+        description "SRv6 policy name.";
+      }
+      leaf source-address {
+        type inet:ipv6-address;
+        mandatory true;
+        description
+          "IPv6 source address for Encap.";
+      }
+
+      uses multi-paths-v6;
+    }
+
+    container end-bm {
+      when "../end-behavior-type = 'End.BM'" {
+        description
+          "This container is valid only when the user chooses
+           End.BM behavior.";
+      }
+      description
+        "Endpoint bound to an SR-MPLS Policy.
+         push an MPLS label stack <L1, L2, L3> on the
+         received packet and forward the according to
+         Lable L1.
+         This is an SRv6 instantiation of an SR-MPLS Binding SID.";
+      // TODO: HC2VPP-332 - Uncommented presence in container so mandatory child is enforced
+      //       only when container is present. Caused by Yangtools not enforcing when statement (YANGTOOLS-688).
+      presence  "Mandatory child only if container is present";
+
+      leaf policy-name {
+        type string;
+        mandatory true;
+
+        description "SRv6 policy name";
+      }
+      uses multi-paths-mpls;
+    }
+
+    container end-dx6 {
+      when "../end-behavior-type = 'End.DX6'" {
+        description
+          "This container is valid only when the user chooses
+           End.DX6 behavior.";
+      }
+      description
+        "Endpoint with decapsulation and cross-connect to
+         an array of IPv6 adjacencies. Pop the (outer)
+         IPv6 header and its extension headers and forward
+         to layer-3 adjacency bound to the SID S.
+         The End.DX6 used in the L3VPN use-case.";
+
+      uses multi-paths-v6;
+    }
+    container end-dx4 {
+      when "../end-behavior-type = 'End.DX4'" {
+        description
+          "This container is valid only when the user chooses
+           End.DX4 behavior.";
+      }
+      description
+        "Endpoint with decapsulation and cross-connect to
+         an array of IPv4 adjacencies.
+         Pop the (outer) IPv6 header and its extension
+         header and forward to layer-3 adjacency bound
+         to the SID S.
+         This would be equivalent to the per-CE VPN
+         label in MPLS.";
+
+      uses multi-paths-v4;
+    }
+    container end-dt6 {
+      when "../end-behavior-type = 'End.DT6'" {
+        description
+          "This container is valid only when the user chooses
+           End.DT6 behavior.";
+      }
+      description
+        "Endpoint with decapsulation and specific IPv6 table
+         lookup.
+         Pop the (outer) IPv6 header and its extension
+         headers.
+
+         Lookup the exposed inner IPv6 DA in IPv6
+         table T and forward via the matched table entry.
+         End.DT6 function is used in L3VPN use-case.";
+      // TODO: HC2VPP-332 - Uncommented presence in container so mandatory child is enforced
+      //       only when container is present. Caused by Yangtools not enforcing when statement (YANGTOOLS-688).
+      presence  "Mandatory child only if container is present";
+
+      leaf lookup-table-ipv6 {
+        type srv6-types:table-id;
+        mandatory true;
+        description "IPv6 table";
+      }
+    }
+   container end-dt4 {
+      when "../end-behavior-type = 'End.DT4'" {
+        description
+          "This container is valid only when the user chooses
+           End.DT4 behavior.";
+      }
+      description
+        "Endpoint with decapsulation and specific
+         IPv4 table lookup.
+         Pop the (outer) IPv6 header and its extension
+         headers.
+         Lookup the exposed inner IPv4 DA in IPv4
+         table T and forward via the matched table entry.
+         This would be equivalent to the per-VRF VPN label
+         in MPLS.";
+         // TODO: HC2VPP-332 - Uncommented presence in container so mandatory child is enforced
+         //       only when container is present. Caused by Yangtools not enforcing when statement (YANGTOOLS-688).
+         presence  "Mandatory child only if container is present";
+
+      leaf lookup-table-ipv4 {
+        type srv6-types:table-id;
+        mandatory true;
+        description "IPv4 table";
+      }
+    }
+    container end-dt46 {
+      when "../end-behavior-type = 'End.DT46'" {
+        description
+          "This container is valid only when the user chooses
+           End.DT46 behavior.";
+      }
+      description
+        "Endpoint with decapsulation and specific
+         IP table lookup.
+         Depending on the protocol type (IPv4 or IPv6)
+         of the inner ip packet and the specific VRF name
+         forward the packet.
+
+         This would be equivalent to the per-VRF VPN
+         label in MPLS.";
+      // TODO: HC2VPP-332 - Uncommented presence in container so mandatory child is enforced
+      //       only when container is present. Caused by Yangtools not enforcing when statement (YANGTOOLS-688).
+      presence  "Mandatory child only if container is present";
+
+      leaf lookup-table-ipv4 {
+        type srv6-types:table-id;
+        mandatory true;
+        description "IPv4 table";
+      }
+      leaf lookup-table-ipv6 {
+        type srv6-types:table-id;
+        mandatory true;
+        description "IPv6 table";
+      }
+    }
+
+   container end-dx2 {
+      when "../end-behavior-type = 'End.DX2'" {
+        description
+          "This container is valid only when the user chooses
+           End.DX2 behavior.";
+      }
+      description
+        "This is an Endpoint with decapsulation and Layer-2
+         cross-connect to OIF.
+         Pop the (outer) IPv6 header and its extension headers.
+         Forward the resulting frame via OIF associated to the SID.
+         The End.DX2 function is the L2VPN use-case";
+      // TODO: HC2VPP-332 - Added presence in container so mandatory child is enforced
+      //       only when container is present. Caused by Yangtools not enforcing when statement (YANGTOOLS-688).
+      presence  "Mandatory child only if container is present";
+
+         container paths {
+           description "List of outgoing paths";
+
+            leaf interface {
+              type if:interface-ref;
+              mandatory true;
+             description "Layer-2 cross-connect to Out interface.";
+            }
+        }
+    }
+    /* TODO
+    container end-dx2v {
+      when "../end-behavior-type = 'End.DX2V'" {
+        description
+          "This container is valid only when the user chooses
+           End.DX2V behavior.";
+      }
+      description
+
+        "Endpoint with decapsulation and specific VLAN
+         L2 table lookup.
+         Pop the (outer) IPv6 header
+         and its extension headers lookup the exposed
+         inner VLANs in L2 table T forward via the
+         matched table entry.
+         The End.DX2V is used for EVPN Flexible cross-connect
+         use-cases";
+        leaf end-dx2v {
+          type empty;
+          description
+            "End_DX2V behavior";
+        }
+    }
+    container end-dt2u {
+      when "../end-behavior-type = 'End.DT2U'" {
+        description
+          "This container is valid only when the user chooses
+           End.DT2U behavior.";
+      }
+      description
+        "Endpoint with decapsulation and specific
+         unicast MAC L2 table lookup.
+         Pop the (outer) IPv6 header and its extension headers.
+         Learn the exposed inner MAC SA in L2 table T.
+         Lookup the exposed inner MAC DA in L2 table T.
+         Forward via the matched T entry else to all L2OIF in T.
+         The End.DT2U is used for EVPN Bridging unicast use cases";
+        leaf end-dt2u {
+          type empty;
+          description
+            "End_DT2U behavior";
+        }
+    }
+    container end-dt2m {
+      when "../end-behavior-type = 'End.DT2M'" {
+        description
+          "This container is valid only when the user chooses
+           End.DT2M behavior.";
+      }
+      description
+        "Endpoint with decapsulation and specific L2 table flooding.
+         Pop the (outer) IPv6 header and its extension headers.
+         Learn the exposed inner MAC SA in L2 table T.
+         Forward on all L2OIF excluding the one specified in Arg.FE2.
+         The End.DT2M is used for EVPN Bridging BUM use case with
+         ESI filtering capability.";
+        leaf end-dt2m {
+
+          type empty;
+          description
+            "End_DT2M behavior";
+        }
+    }
+*/
+
+    container end-otp {
+      when "../end-behavior-type = 'End.OTP'" {
+        description
+          "This container is valid only when the user chooses
+           End.OTP behavior.";
+      }
+      description
+        "Endpoint for OAM with timestamp and punt behavior";
+    }
+  }
+
+  grouping srv6-static-cfg {
+    description
+      "Grouping configuration and operation for SRv6 sid.";
+
+      list sid {
+        key "opcode";
+        description "Local SID list";
+
+        uses srv6-sid-config;
+      }
+  }
+
+ augment "/rt:routing/srv6:srv6/srv6:locators/srv6:locator" {
+     description
+      "This augments locator leaf withing SRv6.";
+
+   container static {
+    description "Static SRv6";
+
+    /* Local SIDs */
+    container local-sids {
+      description
+           "SRv6-static local-SIDs";
+
+      uses srv6-static-cfg;
+      /* no state for now; SID state accessible through base model */
+   }
+
+  }
+ }
+
+} // module
diff --git a/srv6/srv6-api/src/main/yang/ietf-srv6-types@2018-03-01.yang b/srv6/srv6-api/src/main/yang/ietf-srv6-types@2018-03-01.yang
new file mode 100644
index 000000000..e87a92f14
--- /dev/null
+++ b/srv6/srv6-api/src/main/yang/ietf-srv6-types@2018-03-01.yang
@@ -0,0 +1,589 @@
+module ietf-srv6-types {
+
+  namespace "urn:ietf:params:xml:ns:yang:ietf-srv6-types";
+  prefix srv6-types;
+
+  import ietf-inet-types {
+    prefix inet;
+  }
+
+  organization
+    "IETF SPRING Working Group";
+  contact
+    "WG Web:   <http://tools.ietf.org/wg/spring/>
+     WG List:  <mailto:spring@ietf.org>
+
+     Editor:   Kamran Raza
+               <mailto:skraza@cisco.com>
+
+     Editor:   Jaganbabu Rajamanickam
+               <maito:jrajaman@cisco.com>
+
+     Editor:   Xufeng Liu
+               <mailto:Xufeng_Liu@jabil.com>
+
+     Editor:   Zhibo Hu
+               <mailto:huzhibo@huawei.com>
+
+     Editor:   Iftekhar Hussain
+               <mailto:IHussain@infinera.com>
+
+     Editor:   Himanshu Shah
+               <mailto:hshah@ciena.com>
+
+     Editor:   Daniel Voyer
+               <mailto:daniel.voyer@bell.ca>
+
+     Editor:   Hani Elmalky
+               <mailto:hani.elmalky@ericsson.com>
+
+     Editor:   Satoru Matsushima
+               <mailto:satoru.matsushima@gmail.com>
+
+     Editor:   Katsuhiro Horiba
+
+               <mailto:katsuhiro.horiba@g.softbank.co.jp>
+
+     Editor:   Ahmed AbdelSalam
+               <mailto:ahmed.abdelsalam@gssi.it>
+
+     ";
+
+  description
+    "This YANG module defines the essential types for the
+     management of Segment-Routing with IPv6 dataplane (SRv6).
+
+     Copyright (c) 2018 IETF Trust and the persons identified as
+     authors of the code.  All rights reserved.
+
+     Redistribution and use in source and binary forms, with or
+     without modification, is permitted pursuant to, and subject
+     to the license terms contained in, the Simplified BSD License
+     set forth in Section 4.c of the IETF Trust's Legal Provisions
+     Relating to IETF Documents
+     (http://trustee.ietf.org/license-info).";
+
+  reference "RFC XXXX";
+
+  revision 2018-03-01 {
+    description
+      "Updated to align with SRv6 network programming draft rev 04";
+    reference
+      "RFC XXXX: YANG Data Model for SRv6";
+  }
+
+  revision 2017-11-12 {
+    description
+      "Initial revision";
+    reference
+      "RFC XXXX: YANG Data Model for SRv6";
+  }
+
+  identity srv6-endpoint-type {
+      description
+        "Base identity from which specific SRv6 Endpoint types are derived.";
+  }
+
+  /* Endpoints defined under draft-filsfils-spring-srv6-network-programming */
+
+  identity End {
+    base srv6-endpoint-type;
+    description
+          "End function (variant: no PSP, no USP).";
+
+    reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+  }
+
+  identity End_PSP {
+    base srv6-endpoint-type;
+    description
+          "End function (variant: PSP only).";
+    reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+  }
+
+  identity End_USP {
+    base srv6-endpoint-type;
+    description
+          "End function (variant: USP only).";
+    reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+  }
+
+  identity End_PSP_USP {
+    base srv6-endpoint-type;
+    description
+          "End function (variant: PSP and USP).";
+    reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+  }
+
+  identity End.X {
+    base srv6-endpoint-type;
+    description
+          "Endpoint with cross-connect to an array
+           of layer-3 adjacencies (variant: no PSP, no USP).";
+    reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+  }
+
+  identity End.X_PSP {
+    base srv6-endpoint-type;
+    description
+          "Endpoint with cross-connect to an array
+           of layer-3 adjacencies (variant: PSP only).";
+    reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+  }
+
+  identity End.X_USP {
+    base srv6-endpoint-type;
+
+    description
+          "Endpoint with cross-connect to an array
+           of layer-3 adjacencies (variant: USP only).";
+    reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+  }
+
+  identity End.X_PSP_USP {
+    base srv6-endpoint-type;
+    description
+          "Endpoint with cross-connect to an array
+           of layer-3 adjacencies (variant: PSP and USP).";
+    reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+  }
+
+  identity End.T {
+    base srv6-endpoint-type;
+    description
+          "Endpoint with specific IPv6 table lookup
+          (variant: no PSP, no USP).";
+    reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+  }
+
+  identity End.T_PSP {
+    base srv6-endpoint-type;
+    description
+          "Endpoint with specific IPv6 table lookup
+          (variant: PSP only).";
+    reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+  }
+
+  identity End.T_USP {
+    base srv6-endpoint-type;
+    description
+          "Endpoint with specific IPv6 table lookup
+           (variant: USP only).";
+    reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+  }
+
+  identity End.T_PSP_USP {
+    base srv6-endpoint-type;
+    description
+          "Endpoint with specific IPv6 table lookup
+           (variant: PSP and USP).";
+
+    reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+  }
+
+  identity End.B6 {
+    base srv6-endpoint-type;
+    description
+          "Endpoint bound to an SRv6 Policy";
+    reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+  }
+
+  identity End.B6.Encaps {
+    base srv6-endpoint-type;
+    description
+         "This is a variation of the End.B6 behavior
+          where the SRv6 Policy also includes an
+          IPv6 Source Address A.";
+    reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+   }
+
+   identity End.BM {
+     base srv6-endpoint-type;
+     description
+          "Endpoint bound to an SR-MPLS Policy";
+    reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+   }
+
+   identity End.DX6 {
+     base srv6-endpoint-type;
+     description
+          "Endpoint with decapsulation and cross-connect
+           to an array of IPv6 adjacencies";
+     reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+   }
+
+   identity End.DX4 {
+     base srv6-endpoint-type;
+     description
+          "Endpoint with decapsulation and cross-connect
+           to an array of IPv4 adjacencies";
+     reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+   }
+
+
+   identity End.DT6 {
+     base srv6-endpoint-type;
+     description
+          "Endpoint with decapsulation and specific
+           IPv6 table lookup";
+     reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+   }
+
+   identity End.DT4 {
+     base srv6-endpoint-type;
+     description
+          "Endpoint with decapsulation and specific
+           IPv4 table lookup";
+     reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+   }
+
+   identity End.DT46 {
+     base srv6-endpoint-type;
+     description
+          "Endpoint with decapsulation and specific IP
+           (IPv4 or IPv6) table lookup";
+     reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+   }
+
+   identity End.DX2 {
+     base srv6-endpoint-type;
+     description
+          "Endpoint with decapsulation and Layer-2
+           cross-connect to an L2 interface";
+     reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+   }
+
+   identity End.DX2V {
+     base srv6-endpoint-type;
+     description
+          "Endpoint with decapsulation and specific
+           VLAN L2 table lookup";
+     reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+   }
+
+   identity End.DT2U {
+     base srv6-endpoint-type;
+     description
+
+          "Endpoint with decapsulation and specific
+           unicast MAC L2 table lookup";
+     reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+   }
+
+   identity End.DT2M {
+     base srv6-endpoint-type;
+     description
+          "Endpoint with decapsulation and specific L2 table
+           flooding";
+     reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+   }
+
+   identity End.OTP {
+     base srv6-endpoint-type;
+     description
+          "Endpoint for OAM operation of timestamp and punt";
+     reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+   }
+
+   identity End.S {
+     base srv6-endpoint-type;
+     description
+            "Endpoint in search of a target in table TE";
+     reference
+          "draft-filsfils-spring-srv6-network-programming-04";
+   }
+
+   /* Endpoints defined under draft-xuclad-spring-sr-service-chaining */
+
+   identity End.AS {
+     base srv6-endpoint-type;
+     description
+        "Service-Chaining Static proxy for inner type (Ethernet,
+        IPv4 or IPv6)";
+     reference
+          "draft-xuclad-spring-sr-service-chaining-01";
+   }
+
+   identity End.AD {
+     base srv6-endpoint-type;
+     description
+         "Service-Chaining Dynamic proxy for inner type (Ethernet,
+         IPv4 or IPv6)";
+     reference
+
+          "draft-xuclad-spring-sr-service-chaining-01";
+   }
+
+   identity End.ASM {
+     base srv6-endpoint-type;
+     description
+         "Service-Chaining Shared memory SR proxy for inner type
+         (Ethernet, IPv4 or IPv6)";
+     reference
+          "draft-xuclad-spring-sr-service-chaining-01";
+   }
+
+   identity End.AM {
+     base srv6-endpoint-type;
+     description
+         "Service-Chaining Masquerading SR proxy";
+      reference
+          "draft-xuclad-spring-sr-service-chaining-01";
+   }
+
+   /* Endpoints defined under draft-ietf-dmm-srv6-mobile-uplane */
+
+   identity End.MAP {
+     base srv6-endpoint-type;
+     description
+         "DMM End.MAP";
+      reference
+          "draft-ietf-dmm-srv6-mobile-uplane-01";
+   }
+
+   identity End.M.GTP6.UP {
+     base srv6-endpoint-type;
+     description
+         "DMM End.M.GTP6.UP";
+      reference
+          "draft-ietf-dmm-srv6-mobile-uplane-01";
+   }
+
+   identity End.M.GTP6.DN {
+     base srv6-endpoint-type;
+
+     description
+         "DMM End.M.GTP6.DN";
+      reference
+          "draft-ietf-dmm-srv6-mobile-uplane-01";
+   }
+
+   identity End.M.GTP4.DN {
+     base srv6-endpoint-type;
+     description
+         "DMM End.M.GTP4.DN";
+      reference
+          "draft-ietf-dmm-srv6-mobile-uplane-01";
+   }
+
+   identity End.Limit {
+     base srv6-endpoint-type;
+     description
+         "DMM End.Limit";
+      reference
+          "draft-ietf-dmm-srv6-mobile-uplane-01";
+   }
+
+  typedef srv6-transit-type {
+
+    type enumeration {
+      /* draft-filsfils-spring-srv6-network-programming-04 */
+      enum T { value 1; description "Transit behavior"; }
+      enum T.Insert {
+         description "Transit behavior with insertion of an SRv6 policy";
+      }
+      enum T.Insert.Red {
+         description "Transit behavior with reduced insertion of an SRv6 policy";
+      }
+      enum T.Encaps {
+         description "Transit behavior with encap of an SRv6 policy";
+      }
+      enum T.Encaps.Red {
+         description "Transit behavior with reduced encap of an SRv6 policy";
+      }
+      enum T.Encaps.L2 {
+         description "T.Encaps behavior on the received L2 frame";
+      }
+      enum T.Encaps.L2.Red {
+         description "T.Encaps.Red behavior on the received L2 frame";
+      }
+    }
+
+    description "SRv6 Transit behavior types";
+
+  }
+
+  typedef srv6-security-rule-type {
+    type enumeration {
+      /* draft-filsfils-spring-srv6-network-programming-04 */
+      enum SEC1 { value 1; description "Security rule SEC1"; }
+      enum SEC2 { description "Security rule SEC2"; }
+      enum SEC3 { description "Security rule SEC3"; }
+      enum SEC4 { description "Security rule SEC4"; }
+    }
+
+    description "SRv6 Security rule types";
+  }
+
+  typedef srv6-counter-type {
+    type enumeration {
+      /* draft-filsfils-spring-srv6-network-programming-04 */
+      enum CNT1 { value 1; description "CNT1"; }
+      enum CNT2 { description "CNT2"; }
+      enum CNT3 { description "CNT3"; }
+    }
+
+    description "SRv6 counter types";
+  }
+
+  typedef srv6-sid {
+      type inet:ipv6-prefix;
+      description
+      "This type defines a SID value in SRv6";
+  }
+
+  typedef srv6-func-opcode {
+      type uint32;
+      description
+        "This is a typedef for SID FUNC's opcode type";
+  }
+
+  typedef srv6-func-opcode-reserved {
+      type uint32 {
+        range "1 .. 63";
+      }
+
+      description
+        "This is a typedef for SID FUNC's reserved opcode type";
+  }
+
+  typedef srv6-func-opcode-unreserved {
+      type uint32 {
+
+        range "64 .. max";
+      }
+
+      description
+        "This is a typedef for SID FUNC's allocatable (unreserved) opcode type";
+  }
+
+  typedef srv6-func-opcode-reserved-type {
+      type enumeration {
+        enum invalid {  value 0; description "Invalid opcode"; }
+      }
+
+      description "SRv6 SID FUNC Reserved Opcodes";
+  }
+
+  typedef srv6-locator-len {
+      type uint8 {
+        range "32 .. 96";
+      }
+      description
+         "This type defines an SRv6 locator len with range constraints";
+  }
+
+  typedef srv6-sid-pfxlen {
+      type uint8 {
+        range "33 .. 128";
+      }
+      default 128;
+      description
+      "This type defines a SID prefixlen with range constraints";
+  }
+
+ typedef sid-alloc-type {
+    type enumeration {
+      enum Dynamic {
+        description
+          "SID allocated dynamically.";
+      }
+      enum Explicit {
+        description
+          "SID allocated with explicit (static) value";
+      }
+    }
+    description
+      "Types of sid allocation used.";
+  }
+
+  identity srv6-sid-owner-type {
+
+      description
+        "Base identity from which SID owner types are derived.";
+  }
+
+  identity isis {
+      base srv6-sid-owner-type;
+      description "ISIS";
+  }
+
+  identity ospfv3 {
+      base srv6-sid-owner-type;
+      description "OSPFv3";
+  }
+
+  identity bgp {
+      base srv6-sid-owner-type;
+      description "BGP";
+  }
+
+  identity evpn {
+      base srv6-sid-owner-type;
+      description "EVPN";
+  }
+
+  identity sr-policy {
+      base srv6-sid-owner-type;
+      description "SR Policy";
+  }
+
+  identity service-function {
+      base srv6-sid-owner-type;
+      description "SF";
+  }
+
+  // TODO: Rtg module ?
+  typedef table-id {
+    type uint32;
+    description
+      "Routing Table Id";
+  }
+
+  typedef srv6-status-type {
+    type enumeration {
+     enum up { value 1; description "State is Up"; }
+     enum down { description "State is Down"; }
+    }
+    description
+      "Status type";
+
+  }
+
+  typedef srv6-nexthop-type {
+    type enumeration {
+     enum ipv4 { value 1; description "IPv4 next-hop"; }
+     enum ipv6 { description "IPv6 next-hop"; }
+     enum mpls { description "MPLS next-hop"; }
+     enum l2 { description "L2 next-hop"; }
+    }
+    description
+      "Forwarding Next-hop type";
+  }
+
+} // module
diff --git a/srv6/srv6-api/src/main/yang/vpp-ietf-srv6-base@2018-06-13.yang b/srv6/srv6-api/src/main/yang/vpp-ietf-srv6-base@2018-06-13.yang
new file mode 100644
index 000000000..16aad11c8
--- /dev/null
+++ b/srv6/srv6-api/src/main/yang/vpp-ietf-srv6-base@2018-06-13.yang
@@ -0,0 +1,73 @@
+module vpp-ietf-srv6-base {
+
+    namespace "urn:hc2vpp:params:xml:ns:yang:vpp-ietf-srv6-base";
+    prefix vpp-ietf-srv6-base;
+
+    import hc2vpp-ietf-srv6-base {
+        prefix "ietf-srv6-base";
+        revision-date 2018-03-01;
+    }
+
+    import vpp-fib-table-management {
+        prefix fib-management;
+        revision-date 2018-05-21;
+    }
+
+    import hc2vpp-ietf-routing {
+        prefix "rt";
+    }
+
+    import yang-ext { prefix "ext"; }
+
+    organization
+        "FD.io - The Fast Data Project";
+
+    contact
+        "Hc2vpp Wiki <https://wiki.fd.io/view/Hc2vpp>
+         Mailing List <hc2vpp@lists.fd.io>";
+
+    description
+        "This module provides VPP specific configuration of FIB table management
+         for SRv6 base configuration.
+         It augments locator beacause, locator is the routable element in SRv6 and
+         because this is IPv6 specific configuration the address family for FIB has
+         to be always Ipv6.
+
+         Copyright (c) 2018 Bell Canada, Pantheon Technologies and/or its affiliates.
+
+         Licensed under the Apache License, Version 2.0 (the 'License');
+         you may not use this file except in compliance with the License.
+         You may obtain a copy of the License at:
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+         Unless required by applicable law or agreed to in writing, software
+         distributed under the License is distributed on an 'AS IS' BASIS,
+         WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+         See the License for the specific language governing permissions and
+         limitations under the License.";
+
+    revision 2018-06-13 {
+        description "initial revision";
+    }
+
+    grouping vpp-srv6-fib {
+        container fib-table {
+            leaf table-id {
+                type fib-management:fib-table-list-ref;
+                description "VRF index reference.";
+            }
+            leaf address-family {
+                type fib-management:address-family-type;
+                description "Address family reference. For SRv6 has to be always Ipv6.";
+            }
+        }
+    }
+
+    augment "/rt:routing/ietf-srv6-base:srv6/ietf-srv6-base:locators/ietf-srv6-base:locator" {
+        description "This augments locator leaf withing SRv6 with VPP specific configuration.";
+        ext:augment-identifier "vpp-srv6-fib-locator-augment";
+
+        uses vpp-srv6-fib;
+    }
+}