1 files changed, 54 insertions, 0 deletions
diff --git a/resources/libraries/python/InterfaceUtil.py b/resources/libraries/python/InterfaceUtil.py
new file mode 100644
index 0000000000..bc8bf94a9b
--- /dev/null
+++ b/resources/libraries/python/InterfaceUtil.py
@@ -0,0 +1,54 @@
+# Copyright (c) 2016 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.
+
+"""Interface util library"""
+
+from resources.libraries.python.ssh import exec_cmd_no_error
+from resources.libraries.python.topology import NodeType, Topology
+from resources.libraries.python.VatExecutor import VatExecutor
+
+
+class InterfaceUtil(object):
+    """General utilities for managing interfaces"""
+
+    @staticmethod
+    def set_interface_state(node, interface, state):
+        """Set interface state on a node.
+
+        Function can be used for DUTs as well as for TGs.
+
+        :param node: node where the interface is
+        :param interface: interface name
+        :param state: one of 'up' or 'down'
+        :type node: dict
+        :type interface: str
+        :type state: str
+        :return: nothing
+        """
+        if node['type'] == NodeType.DUT:
+            if state == 'up':
+                state = 'admin-up link-up'
+            elif state == 'down':
+                state = 'admin-down link-down'
+            else:
+                raise Exception('Unexpected interface state: {}'.format(state))
+
+            sw_if_index = Topology.get_interface_sw_index(node, interface)
+            VatExecutor.cmd_from_template(node, 'set_if_state.vat',
+                                          sw_if_index=sw_if_index, state=state)
+
+        elif node['type'] == NodeType.TG:
+            cmd = 'ip link set {} {}'.format(interface, state)
+            exec_cmd_no_error(node, cmd, sudo=True)
+        else:
+            raise Exception('Unknown NodeType: "{}"'.format(node['type']))