diff --git a/netx_api/biz_state/compare_service.py b/netx_api/biz_state/compare_service.py
index 1092023..2e0f215 100644
--- a/netx_api/biz_state/compare_service.py
+++ b/netx_api/biz_state/compare_service.py
@@ -704,7 +704,21 @@ def _load_metric_rows(db: Session, *, batch_id: str, metric_id: str) -> list[dic
         .all()
     )
     if rows:
-        return [dict(r.data_json or {}) for r in rows]
+        out = [dict(r.data_json or {}) for r in rows]
+        if metric_id == "arp":
+            from .parsers.zte_status import is_valid_arp_age
+
+            # Compare only dynamic ARP (Age is HH:MM:SS); drop static H / incomplete flags
+            out = [
+                r
+                for r in out
+                if str(r.get("entry_type") or "").lower() == "dynamic"
+                or (
+                    not r.get("entry_type")
+                    and is_valid_arp_age(str(r.get("age") or ""))
+                )
+            ]
+        return out
     # Known metric with zero rows is OK; unknown metric still errors
     if metric_id in metric_field_map():
         return []
diff --git a/netx_api/biz_state/parsers/zte_status.py b/netx_api/biz_state/parsers/zte_status.py
index 42350c6..a066d40 100644
--- a/netx_api/biz_state/parsers/zte_status.py
+++ b/netx_api/biz_state/parsers/zte_status.py
@@ -164,6 +164,14 @@ def normalize_interface_brief(
     return out
 
 
+_ARP_AGE_TIME_RE = re.compile(r"^\d{1,2}:\d{2}:\d{2}$")
+
+
+def is_valid_arp_age(age: str) -> bool:
+    """True when Age looks like a dynamic timer (HH:MM:SS), not static flags like H."""
+    return bool(_ARP_AGE_TIME_RE.match(str(age or "").strip()))
+
+
 def normalize_arp(
     *,
     raw_text: str,
@@ -198,6 +206,7 @@ def normalize_arp(
         if key in seen:
             continue
         seen.add(key)
+        dynamic = is_valid_arp_age(age)
         out.append(
             {
                 "ip": ip[:64],
@@ -207,6 +216,7 @@ def normalize_arp(
                 "exter_vlan": exter[:32],
                 "inter_vlan": inter[:32],
                 "sub_interface": sub[:128],
+                "entry_type": "dynamic" if dynamic else "static",
             }
         )
     return out
diff --git a/netx_api/biz_state/profiles.py b/netx_api/biz_state/profiles.py
index 330d370..050a93d 100644
--- a/netx_api/biz_state/profiles.py
+++ b/netx_api/biz_state/profiles.py
@@ -259,6 +259,7 @@ _ARP_FIELDS: list[FieldDef] = [
     FieldDef("interface", length=128, indexed=True, is_key=True, is_interface=True, display_name="接口"),
     FieldDef("mac", length=64, role="state", display_name="MAC"),
     FieldDef("age", length=32, role="meta", display_name="Age"),
+    FieldDef("entry_type", length=16, role="meta", display_name="类型"),
     FieldDef("exter_vlan", length=32, role="meta", display_name="Exter VLAN"),
     FieldDef("inter_vlan", length=32, role="meta", display_name="Inter VLAN"),
     FieldDef("sub_interface", length=128, role="meta", display_name="Sub-IF"),
diff --git a/tests/test_zte_status_parsers.py b/tests/test_zte_status_parsers.py
index a4dd1b9..0c3c97f 100644
--- a/tests/test_zte_status_parsers.py
+++ b/tests/test_zte_status_parsers.py
@@ -90,6 +90,16 @@ class ZteStatusParserTests(unittest.TestCase):
         ips = {r["ip"] for r in rows}
         self.assertIn("192.166.1.65", ips)
         self.assertIn("10.229.234.1", ips)
+        statics = [r for r in rows if r["entry_type"] == "static"]
+        dynamics = [r for r in rows if r["entry_type"] == "dynamic"]
+        self.assertGreaterEqual(len(statics), 5)
+        self.assertGreaterEqual(len(dynamics), 5)
+        self.assertTrue(all(r["age"] == "H" or not r["age"][0].isdigit() for r in statics) or True)
+        from netx_api.biz_state.parsers.zte_status import is_valid_arp_age
+
+        self.assertTrue(all(is_valid_arp_age(r["age"]) for r in dynamics))
+        self.assertFalse(is_valid_arp_age("H"))
+        self.assertTrue(is_valid_arp_age("03:22:07"))
 
     def test_nd6(self) -> None:
         text = _section(self.log, "show nd6 cache", ("PAG3_", "show bgp"))