[201811][cherry-pick]Update minigraph parser to support MIRROR_DSCP

src/sonic-config-engine/minigraph.py

@@ -242,6 +242,7 @@ def parse_dpg(dpg, hname):
             acl_intfs = []
             is_mirror = False
             is_mirror_v6 = False
+            is_mirror_dscp = False
 
             # TODO: Ensure that acl_intfs will only ever contain front-panel interfaces (e.g.,
             # maybe we should explicity ignore management and loopback interfaces?) because we
@@ -261,7 +262,9 @@ def parse_dpg(dpg, hname):
                     if port_alias_map[member] in intfs_inpc:
                         print >> sys.stderr, "Warning: ACL " + aclname + " is attached to a LAG member interface " + port_alias_map[member] + ", instead of LAG interface"
                 elif member.lower().startswith('erspan'):
-                    if member.lower().startswith('erspanv6'):
+                    if 'dscp' in member.lower():
+                        is_mirror_dscp = True
+                    elif member.lower().startswith('erspanv6'):
                         is_mirror_v6 = True
                     else:
                         is_mirror = True
@@ -283,6 +286,8 @@ def parse_dpg(dpg, hname):
                     acls[aclname]['type'] = 'MIRROR'
                 elif is_mirror_v6:
                     acls[aclname]['type'] = 'MIRRORV6'
+                elif is_mirror_dscp:
+                    acls[aclname]['type'] = 'MIRROR_DSCP'
                 else:
                     acls[aclname]['type'] = 'L3V6' if  'v6' in aclname.lower() else 'L3'
             else:
@@ -481,7 +486,7 @@ def filter_acl_mirror_table_bindings(acls, neighbors, port_channels):
     for acl_table, group_params in acls.iteritems():
         group_type = group_params.get('type', None)
 
-        if group_type != 'MIRROR' and group_type != 'MIRRORV6':
+        if group_type != 'MIRROR' and group_type != 'MIRRORV6' and group_type != 'MIRROR_DSCP':
             continue
 
         active_ports = [ port for port in group_params.get('ports', []) if port in neighbors.keys() or port in port_channels ]

src/sonic-config-engine/tests/simple-sample-graph-case.xml

@@ -175,6 +175,11 @@
           <InAcl>SNMP_ACL</InAcl>
           <Type>SNMP</Type>
         </AclInterface>
+        <AclInterface>
+          <AttachTo>ERSPAN_DSCP</AttachTo>
+          <InAcl>Everflow_dscp</InAcl>
+          <Type>Everflow_dscp</Type>
+        </AclInterface>
       </AclInterfaces>
       <DownstreamSummaries/>
       <DownstreamSummarySet xmlns:a="http://schemas.datacontract.org/2004/07/Microsoft.Search.Autopilot.Evolution"/>

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

@@ -1,7 +1,7 @@
 from unittest import TestCase
 import subprocess
 import os
-
+import minigraph
 class TestCfgGenCaseInsensitive(TestCase):
 
     def setUp(self):
@@ -125,3 +125,16 @@ def test_metadata_ntp(self):
         argument = '-m "' + self.sample_graph + '" -p "' + self.port_config + '" -v "NTP_SERVER"'
         output = self.run_script(argument)
         self.assertEqual(output.strip(), "{'10.0.10.1': {}, '10.0.10.2': {}}")
+
+    def test_minigraph_mirror_dscp(self):
+        result = minigraph.parse_xml(self.sample_graph, port_config_file=self.port_config)
+        self.assertTrue('EVERFLOW_DSCP' in result['ACL_TABLE'])
+        everflow_dscp_entry = result['ACL_TABLE']['EVERFLOW_DSCP']
+
+        self.assertEqual(everflow_dscp_entry['type'], 'MIRROR_DSCP')
+        self.assertEqual(everflow_dscp_entry['stage'], 'ingress')
+        expected_ports = ['PortChannel01', 'Ethernet12', 'Ethernet8', 'Ethernet0']
+        self.assertEqual(
+            everflow_dscp_entry['ports'].sort(),
+            expected_ports.sort()
+        )