diff --git a/es24n_conf.py b/es24n_conf.py
index ec22dd3..7b8c2fe 100644
--- a/es24n_conf.py
+++ b/es24n_conf.py
@@ -604,26 +604,10 @@ def apply_configuration(cfg: ShelfConfig) -> bool:
     results = []
     all_ok  = True
     for iom_cfg in [cfg.iom1, cfg.iom2]:
-        if iom_cfg.dhcp:
-            payload = {"DHCPv4": {"DHCPEnabled": True}}
-        else:
-            payload = {
-                "DHCPv4": {"DHCPEnabled": False},
-                "IPv4StaticAddresses": [{
-                    "Address":    iom_cfg.ip,
-                    "Gateway":    iom_cfg.gateway,
-                    "SubnetMask": iom_cfg.netmask,
-                }],
-            }
-
-        path = f"/redfish/v1/Managers/{iom_cfg.iom}/EthernetInterfaces/1"
-        success, data = _redfish_request(cfg.password, "PATCH", path, payload)
-
-        if success:
-            mode = "DHCP" if iom_cfg.dhcp else f"Static {iom_cfg.ip}"
-            results.append([iom_cfg.iom, _c(C.GRN, "OK"), f"Configured: {mode}"])
-        else:
-            results.append([iom_cfg.iom, _c(C.RED, "FAIL"), str(data)[:60]])
+        success, detail = _apply_iom(cfg.password, iom_cfg)
+        status = _c(C.GRN, "OK") if success else _c(C.RED, "FAIL")
+        results.append([iom_cfg.iom, status, detail])
+        if not success:
             all_ok = False
 
     draw_table(["IOM", "Result", "Detail"], results, [6, 8, 50])
@@ -631,6 +615,60 @@ def apply_configuration(cfg: ShelfConfig) -> bool:
     return all_ok
 
 
+def _apply_iom(password: str, iom_cfg: IOMConfig) -> tuple:
+    """
+    Apply network config to a single IOM.
+
+    DHCP: single PATCH enabling DHCPv4.
+
+    Static: two sequential PATCHes to work around a firmware bug in the
+    current ES24N release that prevents disabling DHCP and setting a static
+    address in the same request.
+      Pass 1 -- set the static IP/gateway/netmask (DHCP still on)
+      Pass 2 -- disable DHCP (address is already committed)
+    """
+    path = f"/redfish/v1/Managers/{iom_cfg.iom}/EthernetInterfaces/1"
+
+    if iom_cfg.dhcp:
+        # DHCP -- single call, no firmware quirk involved
+        ok_flag, data = _redfish_request(
+            password, "PATCH", path,
+            {"DHCPv4": {"DHCPEnabled": True}},
+        )
+        if ok_flag:
+            return True, "Configured: DHCP"
+        return False, str(data)[:80]
+
+    # Static -- Pass 1: set address while DHCP is still enabled
+    info(f"  {iom_cfg.iom} pass 1/2 -- setting static address {iom_cfg.ip}...")
+    ok_flag, data = _redfish_request(
+        password, "PATCH", path,
+        {
+            "IPv4StaticAddresses": [{
+                "Address":    iom_cfg.ip,
+                "Gateway":    iom_cfg.gateway,
+                "SubnetMask": iom_cfg.netmask,
+            }]
+        },
+    )
+    if not ok_flag:
+        return False, f"Pass 1 failed: {str(data)[:70]}"
+
+    # Brief pause to allow the IOM to commit the address before the next call
+    time.sleep(1)
+
+    # Static -- Pass 2: disable DHCP now that the static address is committed
+    info(f"  {iom_cfg.iom} pass 2/2 -- disabling DHCP...")
+    ok_flag, data = _redfish_request(
+        password, "PATCH", path,
+        {"DHCPv4": {"DHCPEnabled": False}},
+    )
+    if not ok_flag:
+        return False, f"Pass 2 failed: {str(data)[:70]}"
+
+    return True, f"Configured: Static {iom_cfg.ip}"
+
+
 # ── Step 5b: Print applied-settings summary ───────────────────────────────────
 def print_summary(cfg: ShelfConfig, changed: bool):
     rule("Summary")