diff --git a/nodescraper/plugins/inband/pcie/pcie_collector.py b/nodescraper/plugins/inband/pcie/pcie_collector.py
index eb3bb5f7..624122ec 100755
--- a/nodescraper/plugins/inband/pcie/pcie_collector.py
+++ b/nodescraper/plugins/inband/pcie/pcie_collector.py
@@ -489,10 +489,20 @@ def get_cap_cfg(
         for cap_id, cap_addr in cap_data.items():
             if cap_id == 0:
                 continue
-            if cap_addr >= 0x100:
-                cap_enum: Enum = ExtendedCapabilityEnum(cap_id)
-            else:
-                cap_enum = CapabilityEnum(cap_id)
+            cap_type = ExtendedCapabilityEnum if cap_addr >= 0x100 else CapabilityEnum
+            try:
+                cap_enum: Enum = cap_type(cap_id)
+            except ValueError:
+                # Unknown / not-yet-modeled capability id. Skip it instead of
+                # aborting the whole collection so one new cap id can't take
+                # down the entire PCIe plugin.
+                self.logger.warning(
+                    "Skipping unknown %s id 0x%X at offset 0x%X",
+                    cap_type.__name__,
+                    cap_id,
+                    cap_addr,
+                )
+                continue
             cap_cls = self.get_cap_struct(cap_enum)
             if cap_cls is None:
                 continue
diff --git a/nodescraper/plugins/inband/pcie/pcie_data.py b/nodescraper/plugins/inband/pcie/pcie_data.py
index 83a03403..70da6375 100644
--- a/nodescraper/plugins/inband/pcie/pcie_data.py
+++ b/nodescraper/plugins/inband/pcie/pcie_data.py
@@ -157,6 +157,7 @@ class ExtendedCapabilityEnum(Enum):
     ALT_PROTOCOL = 0x002B  # Alternate Protocol Extended Capability
     SFI = 0x002C  # System Firmware Intermediary (SFI)Extended Capability
     DOE = 0x2E  # 	0x2e	 Data Object Exchange
+    IDE = 0x2F  # 	0x2f	Integrity and Data Encryption (IDE)
     INT_DOE = 0x30  # 	0x30	Integrity and Data Encryption