update to support configuring an option source (intf or address), and…

… configure server by hostname. This also adds network-instance.

release/models/relay-agent/openconfig-relay-agent.yang

@@ -10,8 +10,10 @@ module openconfig-relay-agent {
   // import some basic types
   import ietf-inet-types { prefix inet; }
   import ietf-yang-types { prefix yang; }
+  import openconfig-network-instance { prefix oc-ni; }
   import openconfig-interfaces { prefix oc-if; }
   import openconfig-extensions { prefix oc-ext; }
+  import openconfig-inet-types { prefix oc-inet; }
 
 
   // meta
@@ -27,7 +29,14 @@ module openconfig-relay-agent {
     packets.  The supports both DHCP and DHCPv6 and device-wide and
     per-interface settings.";
 
-  oc-ext:openconfig-version "0.1.2";
+  oc-ext:openconfig-version "0.2.0";
+
+  revision "2024-09-18" {
+    description
+      "Turn helper-address into a keyed list and add attributes for
+      source and hostname configuration";
+    reference "0.2.0";
+  }
 
   revision "2023-02-06" {
     description
@@ -624,6 +633,62 @@ module openconfig-relay-agent {
 
   }
 
+  grouping relay-agent-ipv4-helper-address-config {
+    description
+      "Configuration options for an IP helper-address";
+
+    leaf address {
+      type oc-inet:host;
+      description
+        "IP address to relay DHCP requests to";
+    }
+
+    leaf local-address {
+      type union {
+        type inet:ipv4-address;
+        type oc-if:interface-id;
+      }
+      description
+        "IP address or interface whose IP address is to be used as source in
+	relayed DHCP requests";
+    }
+
+    leaf network-instance {
+      type oc-ni:network-instance-ref;
+      description
+        "The network instance that this DHCP Server
+        is associated with";
+    }
+  }
+
+  grouping relay-agent-ipv6-helper-address-config {
+    description
+      "Configuration options for an IPv6 helper-address";
+
+    leaf address {
+      type oc-inet:host;
+      description
+        "IPv6 address to relay DHCPv6 requests to";
+    }
+
+    leaf local-address {
+      type union {
+        type inet:ipv6-address;
+        type oc-if:interface-id;
+      }
+      description
+        "IPv6 address or interface whose IPv6 address is to be used as source in
+	relayed DHCPv6 requests";
+    }
+
+    leaf network-instance {
+      type oc-ni:network-instance-ref;
+      description
+        "The network instance that this DHCP Server
+        is associated with";
+    }
+  }
+
   grouping relay-agent-ipv4-interfaces-config {
     description
       "Configuration data for interfaces enabled for relaying";
@@ -644,13 +709,53 @@ module openconfig-relay-agent {
 
     leaf-list helper-address {
       type inet:ip-address;
+      status deprecated;
       description
         "List of IPv4 or IPv6 addresses of DHCP servers to which the
         relay agent should forward DHCPv4 requests.  The relay agent is
         expected to forward DHCPv4/BOOTP requests to all listed
         server addresses when DHCPv4 relaying is enabled globally, or
         on the interface.";
     }
+
+    container helper-addresses {
+      description
+        "Enclosing container for helper addresses";
+      list helper-address {
+	key "address";
+	description
+          "List of IPv4 addresses of DHCP servers to which the
+          relay agent should forward DHCPv4 requests.  The relay agent is
+          expected to forward DHCPv4/BOOTP requests to all listed
+          server addresses when DHCPv4 relaying is enabled globally, or
+          on the interface.";
+
+	leaf address {
+          type leafref {
+            path "../config/address";
+          }
+          description
+            "Reference to list key representing IP helper address";
+        }
+
+
+	container config {
+	  description
+	    "Configuration data for IP helper address";
+
+	  uses relay-agent-ipv4-helper-address-config;
+	}
+
+	container state {
+	  config false;
+
+	  description
+	    "Operational state for IP helper address";
+
+	  uses relay-agent-ipv4-helper-address-config;
+	}
+      }
+    }
   }
 
   grouping relay-agent-ipv4-interfaces-state {
@@ -736,13 +841,52 @@ module openconfig-relay-agent {
 
     leaf-list helper-address {
       type inet:ipv6-address;
+      status deprecated;
       description
         "List of IPv6 addresses of DHCP servers to which the
         relay agent should forward DHCPv6 requests.  The relay agent
         is expected to forward DHCPv4/BOOTP requests to all listed
         server addresses when DHCPv6 relaying is enabled globally, or
         on the interface.";
     }
+
+    container helper-addresses {
+      description
+        "Enclosing container for IPv6 helper addresses";
+      list helper-address {
+        key "address";
+        description
+          "List of IPv6 addresses of DHCP servers to which the
+           relay agent should forward DHCPv6 requests.  The relay agent
+           is expected to forward DHCPv4/BOOTP requests to all listed
+           server addresses when DHCPv6 relaying is enabled globally, or
+           on the interface.";
+
+        leaf address {
+          type leafref {
+            path "../config/address";
+          }
+          description
+            "Reference to list key representing IP helper address";
+        }
+
+        container config {
+          description
+            "Configuration data for IP helper address";
+
+          uses relay-agent-ipv6-helper-address-config;
+        }
+
+        container state {
+          config false;
+
+          description
+            "Operational state for IP helper address";
+
+          uses relay-agent-ipv6-helper-address-config;
+        }
+      }
+    }
   }
 
   grouping relay-agent-ipv6-interfaces-state {