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diff --git a/metis/ccnx/forwarder/metis/core/metis_System.h b/metis/ccnx/forwarder/metis/core/metis_System.h
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+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @header metis_System.h
+ * @abstract System-level properties
+ * @discussion
+ *     <#Discussion#>
+ *
+ */
+
+#ifndef Metis_metis_System_h
+#define Metis_metis_System_h
+
+#include <ccnx/forwarder/metis/core/metis_Forwarder.h>
+#include <ccnx/api/control/cpi_InterfaceSet.h>
+
+/**
+ * @function metisSystem_Interfaces
+ * @abstract The system network interfaces
+ * @discussion
+ *   <#Discussion#>
+ *
+ * @param <#param1#>
+ * @return <#return#>
+ */
+CPIInterfaceSet *metisSystem_Interfaces(MetisForwarder *metis);
+
+/**
+ * Returns the MTU of the named interface
+ *
+ * <#Paragraphs Of Explanation#>
+ *
+ * @param [in] metis An allocated forwarder
+ * @param [in] interfaceName The system interface name, e.g. "eth0"
+ *
+ * @return 0 Interface does not exist
+ * @return positive the MTU the kernel reports
+ *
+ * Example:
+ * @code
+ * {
+ *     <#example#>
+ * }
+ * @endcode
+ */
+unsigned metisSystem_InterfaceMtu(MetisForwarder *metis, const char *interfaceName);
+
+/**
+ * Returns the LINK address of the specified interface
+ *
+ * <#Paragraphs Of Explanation#>
+ *
+ * @param [in] metis An allocated forwarder
+ * @param [in] interfaceName The system interface name, e.g. "eth0"
+ *
+ * @retval non-null The MAC address of the interface
+ * @retval null The interface does not exist
+ *
+ * Example:
+ * @code
+ * {
+ *     CPIAddress *linkAddress = metisSystem_GetMacAddressByName(metis, "en0");
+ * }
+ * @endcode
+ */
+CPIAddress *metisSystem_GetMacAddressByName(MetisForwarder *metis, const char *interfaceName);
+#endif