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>

1 files changed, 832 insertions, 0 deletions

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