Update SNMP AGENT ADDRESS config table with default

values in minigraph parser

Signed-off-by: Suvarna Meenakshi <sumeenak@microsoft.com>

src/sonic-config-engine/minigraph.py

@@ -16,6 +16,7 @@
 
 from portconfig import get_port_config, get_fabric_port_config, get_fabric_monitor_config
 from sonic_py_common.interface import backplane_prefix
+from sonic_py_common.multi_asic import is_multi_asic
 
 # TODO: Remove this once we no longer support Python 2
 if sys.version_info.major == 3:
@@ -1713,6 +1714,22 @@ def parse_xml(filename, platform=None, port_config_file=None, asic_name=None, hw
 
     results['MGMT_VRF_CONFIG'] = mvrf
 
+    # Update SNMP_AGENT_ADDRESS_CONFIG with Management IP and Loopback0 IP
+    # for single-asic platform.
+    # Update SNMP_AGENT_ADDRESS_CONFIG with Management IP and docker0 IP
+    # for multi-asic platform.
+    results['SNMP_AGENT_ADDRESS_CONFIG'] = {}
+    if asic_name is None and not is_multi_asic():
+        results['SNMP_AGENT_ADDRESS_CONFIG'] = {}
+        for mgmt_if in results['MGMT_INTERFACE'].keys():
+            snmp_key = mgmt_if[1].split('/')[0] + '|161|'
+            results['SNMP_AGENT_ADDRESS_CONFIG'][snmp_key] = {}
+        # Add Loopback0 IP as agent address for single asic
+        for loip in results['LOOPBACK_INTERFACE']:
+            if len(loip) == 2 and loip[0] == 'Loopback0':
+                snmp_key = loip[1].split('/')[0] + '|161|'
+                results['SNMP_AGENT_ADDRESS_CONFIG'][snmp_key] = {}
+
     phyport_intfs = {}
     vlan_intfs = {}
     pc_intfs = {}

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

@@ -1145,4 +1145,9 @@ def test_minigraph_cisco_400g_to_100G_speed_no_lane_change(self):
             )
         )
 
-
+    def testsnmp_agent_address_config(self):
+        argument = ['-m', self.sample_graph, '-p', self.port_config, '-v', 'SNMP_AGENT_ADDRESS_CONFIG.keys()|list']
+        output = self.run_script(argument)
+        self.assertEqual(
+            utils.liststr_to_dict(output.strip()),
+            utils.liststr_to_dict("['192.168.200.15|161|', '100.0.0.6|161|']")