diff --git a/test/gnmi/testdata/nx.cisco.networking.metal.ironcore.dev/interface_physical_ipv6_linklocal.txtar b/test/gnmi/testdata/nx.cisco.networking.metal.ironcore.dev/interface_physical_ipv6_linklocal.txtar
new file mode 100644
index 000000000..0a3b3aa1e
--- /dev/null
+++ b/test/gnmi/testdata/nx.cisco.networking.metal.ironcore.dev/interface_physical_ipv6_linklocal.txtar
@@ -0,0 +1,126 @@
+# Physical Interface with IPv6 Link-Local Address Only
+-- interfaces/eth1-1 --
+apiVersion: networking.metal.ironcore.dev/v1alpha1
+kind: Interface
+metadata:
+  name: eth1-1
+  namespace: default
+spec:
+  deviceRef:
+    name: device
+  name: eth1/1
+  description: Leaf1 to Spine1
+  adminState: Up
+  type: Physical
+  mtu: 9216
+  ipv6:
+    useLinkLocalOnly: true
+
+-- state/preload --
+{
+  "System": {
+    "procsys-items": {
+      "bootTime": "1700000000"
+    }
+  }
+}
+
+-- state/expect --
+
+{
+  "System": {
+    "procsys-items": {
+      "bootTime": "1700000000"
+    },
+    "intf-items": {
+      "phys-items": {
+        "PhysIf-list": [
+          {
+            "accessVlan": "unknown",
+            "adminSt": "up",
+            "descr": "Leaf1 to Spine1",
+            "FECMode": "auto",
+            "id": "eth1/1",
+            "layer": "Layer3",
+            "mtu": 9216,
+            "medium": "broadcast",
+            "mode": "access",
+            "nativeVlan": "unknown",
+            "userCfgdFlags": "admin_layer,admin_mtu,admin_state",
+            "rtvrfMbr-items": {
+              "tDn": "/System/inst-items/Inst-list[name='default']"
+            },
+            "physExtd-items": {
+              "bufferBoost": "enable"
+            }
+          }
+        ]
+      }
+    },
+    "ipv6-items": {
+      "inst-items": {
+        "dom-items": {
+          "Dom-list": [
+            {
+              "name": "default",
+              "if-items": {
+                "If-list": [
+                  {
+                    "id": "eth1/1",
+                    "useLinkLocalAddr": "enabled"
+                  }
+                ]
+              }
+            }
+          ]
+        }
+      }
+    }
+  }
+}
+
+-- state/delete --
+
+{
+  "System": {
+    "procsys-items": {
+      "bootTime": "1700000000"
+    },
+    "intf-items": {
+      "phys-items": {
+        "PhysIf-list": [
+          {
+            "accessVlan": "vlan-1",
+            "descr": "DME_UNSET_PROPERTY_MARKER",
+            "FECMode": "auto",
+            "id": "eth1/1",
+            "layer": "Layer2",
+            "mtu": 1500,
+            "medium": "broadcast",
+            "mode": "access",
+            "nativeVlan": "vlan-1",
+            "userCfgdFlags": "",
+            "physExtd-items": {
+              "bufferBoost": "enable"
+            },
+            "trunkVlans": "1-4094"
+          }
+        ]
+      }
+    },
+    "ipv6-items": {
+      "inst-items": {
+        "dom-items": {
+          "Dom-list": [
+            {
+              "name": "default",
+              "if-items": {
+                "If-list": []
+              }
+            }
+          ]
+        }
+      }
+    }
+  }
+}
diff --git a/test/gnmi/testdata/openconfig.networking.metal.ironcore.dev/interface_physical_ipv6_linklocal.txtar b/test/gnmi/testdata/openconfig.networking.metal.ironcore.dev/interface_physical_ipv6_linklocal.txtar
new file mode 100644
index 000000000..ea44a0c24
--- /dev/null
+++ b/test/gnmi/testdata/openconfig.networking.metal.ironcore.dev/interface_physical_ipv6_linklocal.txtar
@@ -0,0 +1,97 @@
+# Physical Interface with IPv6 Link-Local Address Only
+-- interfaces/eth1-1 --
+apiVersion: networking.metal.ironcore.dev/v1alpha1
+kind: Interface
+metadata:
+  name: eth1-1
+  namespace: default
+spec:
+  deviceRef:
+    name: device
+  name: eth1/1
+  description: Leaf1 to Spine1
+  adminState: Up
+  type: Physical
+  mtu: 9216
+  ipv6:
+    useLinkLocalOnly: true
+
+-- state/preload --
+{
+  "openconfig-system:system": {
+    "state": {
+      "boot-time": "1784731445707000000"
+    }
+  }
+}
+
+-- state/expect --
+
+{
+  "openconfig-system:system": {
+    "state": {
+      "boot-time": "1784731445707000000"
+    }
+  },
+  "openconfig-interfaces:interfaces": {
+    "interface": [
+      {
+        "config": {
+          "name": "eth1/1",
+          "type": "iana-if-type:ethernetCsmacd",
+          "description": "Leaf1 to Spine1",
+          "enabled": true,
+          "mtu": 9216
+        },
+        "subinterfaces": {
+          "subinterface": [
+            {
+              "index": 0,
+              "config": {
+                "index": 0,
+                "enabled": true
+              },
+              "openconfig-if-ip:ipv6": {
+                "config": {
+                  "enabled": true
+                }
+              }
+            }
+          ]
+        },
+        "name": "eth1/1"
+      }
+    ]
+  }
+}
+
+-- state/delete --
+
+{
+  "openconfig-system:system": {
+    "state": {
+      "boot-time": "1784731445707000000"
+    }
+  },
+  "openconfig-interfaces:interfaces": {
+    "interface": [
+      {
+        "config": {
+          "name": "eth1/1",
+          "type": "iana-if-type:ethernetCsmacd",
+          "enabled": false
+        },
+        "name": "eth1/1",
+        "openconfig-if-ethernet:ethernet": {
+          "openconfig-vlan:switched-vlan": {
+            "config": {
+              "trunk-vlans": [
+                "1..4094"
+              ]
+            }
+          }
+        }
+      }
+    ]
+  }
+}