Add leaves for common org-defined TLVs to LLDP neighbor state

release/models/lldp/openconfig-lldp.yang

@@ -26,7 +26,15 @@ module openconfig-lldp {
     "This module defines configuration and operational state data
     for the LLDP protocol.";
 
-  oc-ext:openconfig-version "1.1.0";
+  oc-ext:openconfig-version "1.2.0";
+
+  revision "2026-04-14" {
+    description
+      "Add LLDP neighbor state leaves for LLDP-MED inventory serial
+      number, IEEE 802.1 port VLAN ID, and IEEE 802.3 link aggregation
+      and max frame size.";
+    reference "1.2.0";
+  }
 
   revision "2026-04-06" {
     description
@@ -386,6 +394,57 @@ module openconfig-lldp {
         typing to pair up with the 802.1AB Management Address TLV
         specification.";
     }
+
+    leaf med-inventory-serial-number {
+      type string;
+      description
+        "The serial number of the remote device as advertised in
+        the LLDP-MED Inventory - Serial Number TLV.";
+    }
+
+    leaf port-vlan-id {
+      type uint16 {
+        range "0..4094";
+      }
+      description
+        "The port VLAN identifier advertised by the
+        neighbor in the IEEE 802.1 Port VLAN ID TLV. A value of 0
+        indicates that the port is not VLAN-aware.";
+    }
+
+    container link-aggregation {
+      description
+        "Link aggregation state advertised by the neighbor in
+        the IEEE 802.3 Link Aggregation TLV.";
+
+      leaf capable {
+        type boolean;
+        description
+          "Indicates whether the neighbor port is capable of being
+          aggregated.";
+      }
+
+      leaf enabled {
+        type boolean;
+        description
+          "Indicates whether the neighbor port is currently
+          aggregated.";
+      }
+
+      leaf port-id {
+        type uint32;
+        description
+          "The aggregated port identifier of the neighbor port.";
+      }
+    }
+
+    leaf max-frame-size {
+      type uint16;
+      description
+        "The maximum frame size in octets supported by the
+        neighbor port as advertised in the IEEE 802.3 Maximum
+        Frame Size TLV.";
+    }
   }
 
   grouping lldp-capabilities-config {