setup port description if minigraph has neighbor information

Signed-off-by: Guohan Lu <gulv@microsoft.com>

src/sonic-config-engine/minigraph.py

@@ -538,10 +538,14 @@ def parse_xml(filename, platform=None, port_config_file=None):
 
         ports.setdefault(port_name, {})['description'] = port_descriptions[port_name]
 
-    # for the ports w/o description set it to alias, or port name
     for port_name, port in ports.items():
         if not port.get('description'):
-            port['description'] = port.get('alias', port_name)
+            if neighbors.has_key(port_name):
+                # for the ports w/o description set it to neighbor name:port
+                port['description'] = "%s:%s" % (neighbors[port_name]['name'], neighbors[port_name]['port'])
+            else:
+                # for the ports w/o neighbor info, set it to port alias
+                port['description'] = port.get('alias', port_name)
 
     # set default port MTU as 9100
     for port in ports.itervalues():

src/sonic-config-engine/tests/test_cfggen.py

@@ -151,6 +151,11 @@ def test_minigraph_extra_neighbors(self):
                 "'Ethernet112': {'name': 'ARISTA01T1', 'port': 'Ethernet1/1'}, "
                 "'Ethernet120': {'name': 'ARISTA03T1', 'port': 'Ethernet1/1'}}")
 
+    def test_minigraph_port_description(self):
+        argument = '-m "' + self.sample_graph_t0 + '" -p "' + self.port_config + '" -v "PORT[\'Ethernet124\']"'
+        output = self.run_script(argument)
+        self.assertEqual(output.strip(), "{'alias': 'fortyGigE0/124', 'admin_status': 'up', 'lanes': '101,102,103,104', 'description': 'ARISTA04T1:Ethernet1/1', 'mtu': '9100'}")
+
     def test_minigraph_bgp(self):
         argument = '-m "' + self.sample_graph_bgp_speaker + '" -p "' + self.port_config + '" -v "BGP_NEIGHBOR[\'10.0.0.59\']"'
         output = self.run_script(argument)