diff --git a/src/sonic-config-engine/minigraph.py b/src/sonic-config-engine/minigraph.py
index b560df3332cd..a61c3a08529a 100644
--- a/src/sonic-config-engine/minigraph.py
+++ b/src/sonic-config-engine/minigraph.py
@@ -772,7 +772,7 @@ def enable_internal_bgp_session(bgp_sessions, filename, asic_name):
 # Main functions
 #
 ###############################################################################
-def parse_xml(filename, platform=None, port_config_file=None, asic_name=None):
+def parse_xml(filename, platform=None, port_config_file=None, asic_name=None, hwsku_config_file=None):
     """ Parse minigraph xml file.
 
     Keyword arguments:
@@ -782,6 +782,7 @@ def parse_xml(filename, platform=None, port_config_file=None, asic_name=None):
     asic_name -- asic name; to parse multi-asic device minigraph to 
     generate asic specific configuration.
      """
+
     root = ET.parse(filename).getroot()
 
     u_neighbors = None
@@ -836,7 +837,7 @@ def parse_xml(filename, platform=None, port_config_file=None, asic_name=None):
         if child.tag == str(docker_routing_config_mode_qn):
             docker_routing_config_mode = child.text
 
-    (ports, alias_map, alias_asic_map) = get_port_config(hwsku=hwsku, platform=platform, port_config_file=port_config_file, asic=asic_id)
+    (ports, alias_map, alias_asic_map) = get_port_config(hwsku=hwsku, platform=platform, port_config_file=port_config_file, asic=asic_id, hwsku_config_file=hwsku_config_file)
     port_alias_map.update(alias_map)
     port_alias_asic_map.update(alias_asic_map)
 
diff --git a/src/sonic-config-engine/portconfig.py b/src/sonic-config-engine/portconfig.py
index 87e13687ed55..9b2d798aef57 100644
--- a/src/sonic-config-engine/portconfig.py
+++ b/src/sonic-config-engine/portconfig.py
@@ -1,33 +1,144 @@
 #!/usr/bin/env python
-import os
-import sys
+try:
+    import os
+    import sys
+    import json
+    import ast
+    import re
+    from collections import OrderedDict
+    from swsssdk import ConfigDBConnector
+except ImportError as e:
+    raise ImportError("%s - required module not found" % str(e))
 
+# Global Variable
+PLATFORM_ROOT_PATH = '/usr/share/sonic/device'
+PLATFORM_ROOT_PATH_DOCKER = '/usr/share/sonic/platform'
+SONIC_ROOT_PATH = '/usr/share/sonic'
+HWSKU_ROOT_PATH = '/usr/share/sonic/hwsku'
+
+PLATFORM_JSON = 'platform.json'
+PORT_CONFIG_INI = 'port_config.ini'
+HWSKU_JSON = 'hwsku.json'
+
+PORT_STR = "Ethernet"
+BRKOUT_MODE = "default_brkout_mode"
+CUR_BRKOUT_MODE = "brkout_mode"
+INTF_KEY = "interfaces"
+
+BRKOUT_PATTERN = r'(\d{1,3})x(\d{1,3}G)(\[\d{1,3}G\])?(\((\d{1,3})\))?'
+
+
+#
+# Helper Functions
+#
+def readJson(filename):
+    # Read 'platform.json' or 'hwsku.json' file
+    try:
+        with open(filename) as fp:
+            try:
+                data = json.load(fp)
+            except json.JSONDecodeError:
+                print("Json file does not exist")
+        data_dict = ast.literal_eval(json.dumps(data))
+        return data_dict
+    except Exception as e:
+        print("error occurred while parsing json:", sys.exc_info()[1])
+        return None
+
+def db_connect_configdb():
+    """
+    Connect to configdb
+    """
+    config_db = ConfigDBConnector()
+    if config_db is None:
+        return None
+    try:
+        """
+        This could be blocking during the config load_minigraph phase,
+        as the CONFIG_DB_INITIALIZED is not yet set in the configDB.
+        We can ignore the check by using config_db.db_connect('CONFIG_DB') instead
+        """
+        # Connect only if available & initialized
+        config_db.connect(wait_for_init=False)
+    except Exception as e:
+        config_db = None
+    return config_db
 
 def get_port_config_file_name(hwsku=None, platform=None, asic=None):
+
+    # check 'platform.json' file presence
+    port_config_candidates_Json = []
+    port_config_candidates_Json.append(os.path.join(PLATFORM_ROOT_PATH_DOCKER, PLATFORM_JSON))
+    if platform:
+        port_config_candidates_Json.append(os.path.join(PLATFORM_ROOT_PATH, platform, PLATFORM_JSON))
+
+    # check 'portconfig.ini' file presence
     port_config_candidates = []
-    port_config_candidates.append('/usr/share/sonic/hwsku/port_config.ini')
+    port_config_candidates.append(os.path.join(HWSKU_ROOT_PATH, PORT_CONFIG_INI))
     if hwsku:
         if platform:
             if asic:
-                port_config_candidates.append(os.path.join('/usr/share/sonic/device', platform, hwsku, asic,'port_config.ini'))
-            port_config_candidates.append(os.path.join('/usr/share/sonic/device', platform, hwsku, 'port_config.ini'))
-        port_config_candidates.append(os.path.join('/usr/share/sonic/platform', hwsku, 'port_config.ini'))
-        port_config_candidates.append(os.path.join('/usr/share/sonic', hwsku, 'port_config.ini'))
-    for candidate in port_config_candidates:
+                port_config_candidates.append(os.path.join(PLATFORM_ROOT_PATH, platform, hwsku, asic, PORT_CONFIG_INI))
+            port_config_candidates.append(os.path.join(PLATFORM_ROOT_PATH, platform, hwsku, PORT_CONFIG_INI))
+        port_config_candidates.append(os.path.join(PLATFORM_ROOT_PATH_DOCKER, hwsku, PORT_CONFIG_INI))
+        port_config_candidates.append(os.path.join(SONIC_ROOT_PATH, hwsku, PORT_CONFIG_INI))
+
+    elif platform and not hwsku:
+        port_config_candidates.append(os.path.join(PLATFORM_ROOT_PATH, platform, PORT_CONFIG_INI))
+
+    for candidate in port_config_candidates_Json + port_config_candidates:
+        if os.path.isfile(candidate):
+            return candidate
+    return None
+
+def get_hwsku_file_name(hwsku=None, platform=None):
+    hwsku_candidates_Json = []
+    hwsku_candidates_Json.append(os.path.join(HWSKU_ROOT_PATH, HWSKU_JSON))
+    if hwsku:
+        if platform:
+            hwsku_candidates_Json.append(os.path.join(PLATFORM_ROOT_PATH, platform, hwsku, HWSKU_JSON))
+        hwsku_candidates_Json.append(os.path.join(PLATFORM_ROOT_PATH_DOCKER, hwsku, HWSKU_JSON))
+        hwsku_candidates_Json.append(os.path.join(SONIC_ROOT_PATH, hwsku, HWSKU_JSON))
+    for candidate in hwsku_candidates_Json:
         if os.path.isfile(candidate):
             return candidate
     return None
-    
 
+def get_port_config(hwsku=None, platform=None, port_config_file=None, hwsku_config_file=None, asic=None):
+    config_db = db_connect_configdb()
+    # If available, Read from CONFIG DB first
+    if config_db is not None and port_config_file is None:
+
+        port_data = config_db.get_table("PORT")
+        if bool(port_data):
+            ports = ast.literal_eval(json.dumps(port_data))
+            port_alias_map = {}
+            port_alias_asic_map = {}
+            for intf_name in ports.keys():
+                port_alias_map[ports[intf_name]["alias"]] = intf_name
+            return (ports, port_alias_map, port_alias_asic_map)
 
-def get_port_config(hwsku=None, platform=None, port_config_file=None, asic=None):
     if not port_config_file:
         port_config_file = get_port_config_file_name(hwsku, platform, asic)
         if not port_config_file:
             return ({}, {}, {})
-    return parse_port_config_file(port_config_file)
 
 
+    # Read from 'platform.json' file
+    if port_config_file.endswith('.json'):
+        if not hwsku_config_file:
+             hwsku_json_file = get_hwsku_file_name(hwsku, platform)
+             if not hwsku_json_file:
+                return ({}, {}, {})
+        else:
+            hwsku_json_file = hwsku_config_file
+
+        return parse_platform_json_file(hwsku_json_file, port_config_file)
+
+    # If 'platform.json' file is not available, read from 'port_config.ini'
+    else:
+        return parse_port_config_file(port_config_file)
+
 def parse_port_config_file(port_config_file):
     ports = {}
     port_alias_map = {}
@@ -63,4 +174,142 @@ def parse_port_config_file(port_config_file):
                 port_alias_asic_map[data['alias']] = data['asic_port_name'].strip()
     return (ports, port_alias_map, port_alias_asic_map)
 
+# Generate configs (i.e. alias, lanes, speed, index) for port
+def gen_port_config(ports, parent_intf_id, index, alias_at_lanes, lanes, k,  offset):
+    if k is not None:
+        num_lane_used, speed, alt_speed, _ , assigned_lane = k[0], k[1], k[2], k[3], k[4]
+
+        # In case of symmetric mode
+        if assigned_lane is None:
+            assigned_lane = len(lanes.split(","))
+
+        parent_intf_id = int(offset)+int(parent_intf_id)
+        alias_start = 0 + offset
+
+        step = int(assigned_lane)//int(num_lane_used)
+        for i in range(0,int(assigned_lane), step):
+            intf_name = PORT_STR + str(parent_intf_id)
+            ports[intf_name] = {}
+            ports[intf_name]['alias'] = alias_at_lanes.split(",")[alias_start]
+            ports[intf_name]['lanes'] = ','.join(lanes.split(",")[alias_start:alias_start+step])
+            if speed:
+                speed_pat = re.search("^((\d+)G|\d+)$", speed.upper())
+                if speed_pat is None:
+                    raise Exception('{} speed is not Supported...'.format(speed))
+                speed_G, speed_orig = speed_pat.group(2), speed_pat.group(1)
+                if speed_G:
+                    conv_speed = int(speed_G)*1000
+                else:
+                    conv_speed = int(speed_orig)
+                ports[intf_name]['speed'] = str(conv_speed)
+            else:
+                raise Exception('Regex return for speed is None...')
+
+            ports[intf_name]['index'] = index.split(",")[alias_start]
+            ports[intf_name]['admin_status'] = "up"
+
+            parent_intf_id += step
+            alias_start += step
+
+        offset = int(assigned_lane) + int(offset)
+        return offset
+    else:
+        raise Exception('Regex return for k is None...')
+
+"""
+Given a port and breakout mode, this method returns
+the list of child ports using platform_json file
+"""
+def get_child_ports(interface, breakout_mode, platform_json_file):
+    child_ports = {}
+
+    port_dict = readJson(platform_json_file)
+
+    index = port_dict[INTF_KEY][interface]['index']
+    alias_at_lanes = port_dict[INTF_KEY][interface]['alias_at_lanes']
+    lanes = port_dict[INTF_KEY][interface]['lanes']
+
+    """
+    Example of match_list for some breakout_mode using regex
+        Breakout Mode -------> Match_list
+        -----------------------------
+        2x25G(2)+1x50G(2) ---> [('2', '25G', None, '(2)', '2'), ('1', '50G', None, '(2)', '2')]
+        1x50G(2)+2x25G(2) ---> [('1', '50G', None, '(2)', '2'), ('2', '25G', None, '(2)', '2')]
+        1x100G[40G] ---------> [('1', '100G', '[40G]', None, None)]
+        2x50G ---------------> [('2', '50G', None, None, None)]
+    """
+    # Asymmetric breakout mode
+    if re.search("\+",breakout_mode) is not None:
+        breakout_parts = breakout_mode.split("+")
+        match_list = [re.match(BRKOUT_PATTERN, i).groups() for i in breakout_parts]
+
+    # Symmetric breakout mode
+    else:
+        match_list = [re.match(BRKOUT_PATTERN, breakout_mode).groups()]
+
+    offset = 0
+    parent_intf_id = int(re.search("Ethernet(\d+)", interface).group(1))
+    for k in match_list:
+        offset = gen_port_config(child_ports, parent_intf_id, index, alias_at_lanes, lanes, k, offset)
+    return child_ports
+
+def parse_platform_json_file(hwsku_json_file, platform_json_file):
+    ports = {}
+    port_alias_map = {}
+    port_alias_asic_map = {}
+
+    port_dict = readJson(platform_json_file)
+    hwsku_dict = readJson(hwsku_json_file)
+
+    if not port_dict:
+        raise Exception("port_dict is none")
+    if not hwsku_dict:
+        raise Exception("hwsku_dict is none")
+
+    if INTF_KEY not in port_dict or INTF_KEY not in  hwsku_dict:
+        raise Exception("INTF_KEY is not present in appropriate file")
+
+    for intf in port_dict[INTF_KEY]:
+        if intf not in hwsku_dict[INTF_KEY]:
+            raise Exception("{} is not available in hwsku_dict".format(intf))
+
+        # take default_brkout_mode from hwsku.json
+        brkout_mode = hwsku_dict[INTF_KEY][intf][BRKOUT_MODE]
+
+        child_ports = get_child_ports(intf, brkout_mode, platform_json_file)
+        ports.update(child_ports)
+
+    if not ports:
+        raise Exception("Ports dictionary is empty")
+
+    for i in ports.keys():
+        port_alias_map[ports[i]["alias"]]= i
+    return (ports, port_alias_map, port_alias_asic_map)
+
+
+def get_breakout_mode(hwsku=None, platform=None, port_config_file=None):
+    if not port_config_file:
+        port_config_file = get_port_config_file_name(hwsku, platform)
+        if not port_config_file:
+            return None
+    if port_config_file.endswith('.json'):
+        hwsku_json_file = get_hwsku_file_name(hwsku, platform)
+        if not hwsku_json_file:
+            raise Exception("'hwsku_json' file does not exist!!! This file is necessary to proceed forward.")
+
+        return parse_breakout_mode(hwsku_json_file)
+    else:
+        return None
+
+def parse_breakout_mode(hwsku_json_file):
+    brkout_table = {}
+    hwsku_dict = readJson(hwsku_json_file)
+    if not hwsku_dict:
+        raise Exception("hwsku_dict is empty")
+    if INTF_KEY not in  hwsku_dict:
+        raise Exception("INTF_KEY is not present in hwsku_dict")
 
+    for intf in hwsku_dict[INTF_KEY]:
+        brkout_table[intf] = {}
+        brkout_table[intf][CUR_BRKOUT_MODE] = hwsku_dict[INTF_KEY][intf][BRKOUT_MODE]
+    return brkout_table
diff --git a/src/sonic-config-engine/sonic-cfggen b/src/sonic-config-engine/sonic-cfggen
index c247d85abec3..c0f61d8a95f9 100755
--- a/src/sonic-config-engine/sonic-cfggen
+++ b/src/sonic-config-engine/sonic-cfggen
@@ -38,7 +38,7 @@ from minigraph import minigraph_encoder
 from minigraph import parse_xml
 from minigraph import parse_device_desc_xml
 from minigraph import parse_asic_sub_role
-from portconfig import get_port_config
+from portconfig import get_port_config, get_port_config_file_name, get_breakout_mode
 from sonic_device_util import get_machine_info
 from sonic_device_util import get_platform_info
 from sonic_device_util import get_system_mac
@@ -199,6 +199,7 @@ def main():
     group.add_argument("-k", "--hwsku", help="HwSKU")
     parser.add_argument("-n", "--namespace", help="namespace name", nargs='?', const=None, default=None)
     parser.add_argument("-p", "--port-config", help="port config file, used with -m or -k", nargs='?', const=None)
+    parser.add_argument("-S", "--hwsku-config", help="hwsku config file, used with -p and -m or -k", nargs='?', const=None)
     parser.add_argument("-y", "--yaml", help="yaml file that contains additional variables", action='append', default=[])
     parser.add_argument("-j", "--json", help="json file that contains additional variables", action='append', default=[])
     parser.add_argument("-a", "--additional-data", help="addition data, in json string")
@@ -240,12 +241,18 @@ def main():
             'hwsku': hwsku
             }}}
         deep_update(data, hardware_data)
+        if args.port_config is None:
+            args.port_config = get_port_config_file_name(hwsku, platform)
         (ports, _, _) = get_port_config(hwsku, platform, args.port_config, asic_id)
         if not ports:
             print('Failed to get port config', file=sys.stderr)
             sys.exit(1)
         deep_update(data, {'PORT': ports})
 
+        brkout_table = get_breakout_mode(hwsku, platform, args.port_config)
+        if  brkout_table is not None:
+            deep_update(data, {'BREAKOUT_CFG': brkout_table})
+
     for json_file in args.json:
         with open(json_file, 'r') as stream:
             deep_update(data, FormatConverter.to_deserialized(json.load(stream)))
@@ -254,11 +261,11 @@ def main():
         minigraph = args.minigraph
         if platform:
             if args.port_config != None:
-                deep_update(data, parse_xml(minigraph, platform, args.port_config, asic_name=asic_name))
+                deep_update(data, parse_xml(minigraph, platform, args.port_config, asic_name=asic_name, hwsku_config_file=args.hwsku_config))
             else:
                 deep_update(data, parse_xml(minigraph, platform, asic_name=asic_name))
         else:
-            deep_update(data, parse_xml(minigraph, port_config_file=args.port_config, asic_name=asic_name))
+            deep_update(data, parse_xml(minigraph, port_config_file=args.port_config, asic_name=asic_name, hwsku_config_file=args.hwsku_config))
 
     if args.device_description != None:
         deep_update(data, parse_device_desc_xml(args.device_description))
diff --git a/src/sonic-config-engine/tests/sample_hwsku.json b/src/sonic-config-engine/tests/sample_hwsku.json
new file mode 100644
index 000000000000..5b450932c238
--- /dev/null
+++ b/src/sonic-config-engine/tests/sample_hwsku.json
@@ -0,0 +1,100 @@
+{
+    "interfaces": {
+        "Ethernet0": {
+            "default_brkout_mode": "1x100G[40G]"
+        },
+        "Ethernet4": {
+            "default_brkout_mode": "2x50G"
+        },
+        "Ethernet8": {
+            "default_brkout_mode": "4x25G[10G]"
+        },
+        "Ethernet12": {
+            "default_brkout_mode": "2x25G(2)+1x50G(2)"
+        },
+        "Ethernet16": {
+            "default_brkout_mode": "1x50G(2)+2x25G(2)"
+        },
+        "Ethernet20": {
+            "default_brkout_mode": "1x100G[40G]"
+        },
+        "Ethernet24": {
+            "default_brkout_mode": "2x50G"
+        },
+        "Ethernet28": {
+            "default_brkout_mode": "4x25G[10G]"
+        },
+        "Ethernet32": {
+            "default_brkout_mode": "2x25G(2)+1x50G(2)"
+        },
+        "Ethernet36": {
+            "default_brkout_mode": "1x50G(2)+2x25G(2)"
+        },
+        "Ethernet40": {
+            "default_brkout_mode": "1x100G[40G]"
+        },
+        "Ethernet44": {
+            "default_brkout_mode": "2x50G"
+        },
+        "Ethernet48": {
+            "default_brkout_mode": "4x25G[10G]"
+        },
+        "Ethernet52": {
+            "default_brkout_mode": "2x25G(2)+1x50G(2)"
+        },
+        "Ethernet56": {
+            "default_brkout_mode": "1x50G(2)+2x25G(2)"
+        },
+        "Ethernet60": {
+            "default_brkout_mode": "1x100G[40G]"
+        },
+        "Ethernet64": {
+            "default_brkout_mode": "2x50G"
+        },
+        "Ethernet68": {
+            "default_brkout_mode": "4x25G[10G]"
+        },
+        "Ethernet72": {
+            "default_brkout_mode": "2x25G(2)+1x50G(2)"
+        },
+        "Ethernet76": {
+            "default_brkout_mode": "1x50G(2)+2x25G(2)"
+        },
+        "Ethernet80": {
+            "default_brkout_mode": "1x100G[40G]"
+        },
+        "Ethernet84": {
+            "default_brkout_mode": "2x50G"
+        },
+        "Ethernet88": {
+            "default_brkout_mode": "4x25G[10G]"
+        },
+        "Ethernet92": {
+            "default_brkout_mode": "2x25G(2)+1x50G(2)"
+        },
+        "Ethernet96": {
+            "default_brkout_mode": "1x50G(2)+2x25G(2)"
+        },
+        "Ethernet100": {
+            "default_brkout_mode": "1x100G[40G]"
+        },
+        "Ethernet104": {
+            "default_brkout_mode": "2x50G"
+        },
+        "Ethernet108": {
+            "default_brkout_mode": "4x25G[10G]"
+        },
+        "Ethernet112": {
+            "default_brkout_mode": "2x25G(2)+1x50G(2)"
+        },
+        "Ethernet116": {
+            "default_brkout_mode": "1x50G(2)+2x25G(2)"
+        },
+        "Ethernet120": {
+            "default_brkout_mode": "1x100G[40G]"
+        },
+        "Ethernet124": {
+            "default_brkout_mode": "2x50G"
+        }
+    }
+}
diff --git a/src/sonic-config-engine/tests/sample_output/platform_output.json b/src/sonic-config-engine/tests/sample_output/platform_output.json
new file mode 100644
index 000000000000..f4e031fbe536
--- /dev/null
+++ b/src/sonic-config-engine/tests/sample_output/platform_output.json
@@ -0,0 +1,819 @@
+{
+  "Ethernet8": {
+    "index": "3",
+    "lanes": "8",
+    "description": "Eth3/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth3/1",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet9": {
+    "index": "3",
+    "lanes": "9",
+    "description": " Eth3/2",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth3/2",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet36": {
+    "index": "10",
+    "lanes": "36,37",
+    "description": "Eth10/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth10/1",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet98": {
+    "index": "25",
+    "lanes": "98",
+    "description": " Eth25/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth25/3",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet0": {
+    "index": "1",
+    "lanes": "0,1,2,3",
+    "fec": "rs",
+    "description": "Eth1/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth1/1",
+    "pfc_asym": "off",
+    "speed": "100000"
+  },
+  "Ethernet6": {
+    "index": "2",
+    "lanes": "6,7",
+    "description": " Eth2/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth2/3",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet4": {
+    "index": "2",
+    "lanes": "4,5",
+    "description": "Eth2/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth2/1",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet109": {
+    "index": "28",
+    "lanes": "109",
+    "description": " Eth28/2",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth28/2",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet108": {
+    "index": "28",
+    "lanes": "108",
+    "description": "Eth28/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth28/1",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet18": {
+    "index": "5",
+    "lanes": "18",
+    "description": " Eth5/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth5/3",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet100": {
+    "index": "26",
+    "lanes": "100,101,102,103",
+    "fec": "rs",
+    "description": "Eth26/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth26/1",
+    "pfc_asym": "off",
+    "speed": "100000"
+  },
+  "Ethernet34": {
+    "index": "9",
+    "lanes": "34,35",
+    "description": " Eth9/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth9/3",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet104": {
+    "index": "27",
+    "lanes": "104,105",
+    "description": "Eth27/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth27/1",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet106": {
+    "index": "27",
+    "lanes": "106,107",
+    "description": " Eth27/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth27/3",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet94": {
+    "index": "24",
+    "lanes": "94,95",
+    "description": " Eth24/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth24/3",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet126": {
+    "index": "32",
+    "lanes": "126,127",
+    "description": " Eth32/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth32/3",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet96": {
+    "index": "25",
+    "lanes": "96,97",
+    "description": "Eth25/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth25/1",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet124": {
+    "index": "32",
+    "lanes": "124,125",
+    "description": "Eth32/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth32/1",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet90": {
+    "index": "23",
+    "lanes": "90",
+    "description": " Eth23/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth23/3",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet91": {
+    "index": "23",
+    "lanes": "91",
+    "description": " Eth23/4",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth23/4",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet92": {
+    "index": "24",
+    "lanes": "92",
+    "description": "Eth24/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth24/1",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet93": {
+    "index": "24",
+    "lanes": "93",
+    "description": " Eth24/2",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth24/2",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet50": {
+    "index": "13",
+    "lanes": "50",
+    "description": " Eth13/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth13/3",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet51": {
+    "index": "13",
+    "lanes": "51",
+    "description": " Eth13/4",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth13/4",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet52": {
+    "index": "14",
+    "lanes": "52",
+    "description": "Eth14/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth14/1",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet53": {
+    "index": "14",
+    "lanes": "53",
+    "description": " Eth14/2",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth14/2",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet54": {
+    "index": "14",
+    "lanes": "54,55",
+    "description": " Eth14/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth14/3",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet99": {
+    "index": "25",
+    "lanes": "99",
+    "description": " Eth25/4",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth25/4",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet56": {
+    "index": "15",
+    "lanes": "56,57",
+    "description": "Eth15/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth15/1",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet113": {
+    "index": "29",
+    "lanes": "113",
+    "description": " Eth29/2",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth29/2",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet76": {
+    "index": "20",
+    "lanes": "76,77",
+    "description": "Eth20/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth20/1",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet74": {
+    "index": "19",
+    "lanes": "74,75",
+    "description": " Eth19/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth19/3",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet39": {
+    "index": "10",
+    "lanes": "39",
+    "description": " Eth10/4",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth10/4",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet72": {
+    "index": "19",
+    "lanes": "72",
+    "description": "Eth19/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth19/1",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet73": {
+    "index": "19",
+    "lanes": "73",
+    "description": " Eth19/2",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth19/2",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet70": {
+    "index": "18",
+    "lanes": "70",
+    "description": " Eth18/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth18/3",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet71": {
+    "index": "18",
+    "lanes": "71",
+    "description": " Eth18/4",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth18/4",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet32": {
+    "index": "9",
+    "lanes": "32",
+    "description": "Eth9/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth9/1",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet33": {
+    "index": "9",
+    "lanes": "33",
+    "description": " Eth9/2",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth9/2",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet16": {
+    "index": "5",
+    "lanes": "16,17",
+    "description": "Eth5/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth5/1",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet111": {
+    "index": "28",
+    "lanes": "111",
+    "description": " Eth28/4",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth28/4",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet10": {
+    "index": "3",
+    "lanes": "10",
+    "description": " Eth3/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth3/3",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet11": {
+    "index": "3",
+    "lanes": "11",
+    "description": " Eth3/4",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth3/4",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet12": {
+    "index": "4",
+    "lanes": "12",
+    "description": "Eth4/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth4/1",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet13": {
+    "index": "4",
+    "lanes": "13",
+    "description": " Eth4/2",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth4/2",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet58": {
+    "index": "15",
+    "lanes": "58",
+    "description": " Eth15/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth15/3",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet19": {
+    "index": "5",
+    "lanes": "19",
+    "description": " Eth5/4",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth5/4",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet59": {
+    "index": "15",
+    "lanes": "59",
+    "description": " Eth15/4",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth15/4",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet38": {
+    "index": "10",
+    "lanes": "38",
+    "description": " Eth10/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth10/3",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet78": {
+    "index": "20",
+    "lanes": "78",
+    "description": " Eth20/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth20/3",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet68": {
+    "index": "18",
+    "lanes": "68",
+    "description": "Eth18/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth18/1",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet14": {
+    "index": "4",
+    "lanes": "14,15",
+    "description": " Eth4/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth4/3",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet89": {
+    "index": "23",
+    "lanes": "89",
+    "description": " Eth23/2",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth23/2",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet88": {
+    "index": "23",
+    "lanes": "88",
+    "description": "Eth23/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth23/1",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet118": {
+    "index": "30",
+    "lanes": "118",
+    "description": " Eth30/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth30/3",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet119": {
+    "index": "30",
+    "lanes": "119",
+    "description": " Eth30/4",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth30/4",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet116": {
+    "index": "30",
+    "lanes": "116,117",
+    "description": "Eth30/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth30/1",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet114": {
+    "index": "29",
+    "lanes": "114,115",
+    "description": " Eth29/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth29/3",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet80": {
+    "index": "21",
+    "lanes": "80,81,82,83",
+    "fec": "rs",
+    "description": "Eth21/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth21/1",
+    "pfc_asym": "off",
+    "speed": "100000"
+  },
+  "Ethernet112": {
+    "index": "29",
+    "lanes": "112",
+    "description": "Eth29/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth29/1",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet86": {
+    "index": "22",
+    "lanes": "86,87",
+    "description": " Eth22/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth22/3",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet110": {
+    "index": "28",
+    "lanes": "110",
+    "description": " Eth28/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth28/3",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet84": {
+    "index": "22",
+    "lanes": "84,85",
+    "description": "Eth22/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth22/1",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet31": {
+    "index": "8",
+    "lanes": "31",
+    "description": " Eth8/4",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth8/4",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet49": {
+    "index": "13",
+    "lanes": "49",
+    "description": " Eth13/2",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth13/2",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet48": {
+    "index": "13",
+    "lanes": "48",
+    "description": "Eth13/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth13/1",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet46": {
+    "index": "12",
+    "lanes": "46,47",
+    "description": " Eth12/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth12/3",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet30": {
+    "index": "8",
+    "lanes": "30",
+    "description": " Eth8/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth8/3",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet29": {
+    "index": "8",
+    "lanes": "29",
+    "description": " Eth8/2",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth8/2",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet40": {
+    "index": "11",
+    "lanes": "40,41,42,43",
+    "fec": "rs",
+    "description": "Eth11/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth11/1",
+    "pfc_asym": "off",
+    "speed": "100000"
+  },
+  "Ethernet120": {
+    "index": "31",
+    "lanes": "120,121,122,123",
+    "fec": "rs",
+    "description": "Eth31/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth31/1",
+    "pfc_asym": "off",
+    "speed": "100000"
+  },
+  "Ethernet28": {
+    "index": "8",
+    "lanes": "28",
+    "description": "Eth8/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth8/1",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet66": {
+    "index": "17",
+    "lanes": "66,67",
+    "description": " Eth17/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth17/3",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet60": {
+    "index": "16",
+    "lanes": "60,61,62,63",
+    "fec": "rs",
+    "description": "Eth16/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth16/1",
+    "pfc_asym": "off",
+    "speed": "100000"
+  },
+  "Ethernet64": {
+    "index": "17",
+    "lanes": "64,65",
+    "description": "Eth17/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth17/1",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet44": {
+    "index": "12",
+    "lanes": "44,45",
+    "description": "Eth12/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth12/1",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet20": {
+    "index": "6",
+    "lanes": "20,21,22,23",
+    "fec": "rs",
+    "description": "Eth6/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth6/1",
+    "pfc_asym": "off",
+    "speed": "100000"
+  },
+  "Ethernet79": {
+    "index": "20",
+    "lanes": "79",
+    "description": " Eth20/4",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth20/4",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet69": {
+    "index": "18",
+    "lanes": "69",
+    "description": " Eth18/2",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth18/2",
+    "pfc_asym": "off",
+    "speed": "25000"
+  },
+  "Ethernet24": {
+    "index": "7",
+    "lanes": "24,25",
+    "description": "Eth7/1",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": "Eth7/1",
+    "pfc_asym": "off",
+    "speed": "50000"
+  },
+  "Ethernet26": {
+    "index": "7",
+    "lanes": "26,27",
+    "description": " Eth7/3",
+    "admin_status": "up",
+    "mtu": "9100",
+    "alias": " Eth7/3",
+    "pfc_asym": "off",
+    "speed": "50000"
+  }
+}
diff --git a/src/sonic-config-engine/tests/sample_platform.json b/src/sonic-config-engine/tests/sample_platform.json
new file mode 100644
index 000000000000..fd11a49ed0a0
--- /dev/null
+++ b/src/sonic-config-engine/tests/sample_platform.json
@@ -0,0 +1,196 @@
+{
+    "interfaces": {
+        "Ethernet0": {
+            "index": "1,1,1,1",
+            "lanes": "0,1,2,3",
+            "alias_at_lanes": "Eth1/1, Eth1/2, Eth1/3, Eth1/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet4": {
+            "index": "2,2,2,2",
+            "lanes": "4,5,6,7",
+            "alias_at_lanes": "Eth2/1, Eth2/2, Eth2/3, Eth2/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G]"
+        },
+        "Ethernet8": {
+            "index": "3,3,3,3",
+            "lanes": "8,9,10,11",
+            "alias_at_lanes": "Eth3/1, Eth3/2, Eth3/3, Eth3/4",
+            "breakout_modes": "1x100G[40G],2x50G,2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet12": {
+            "index": "4,4,4,4",
+            "lanes": "12,13,14,15",
+            "alias_at_lanes": "Eth4/1, Eth4/2, Eth4/3, Eth4/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet16": {
+            "index": "5,5,5,5",
+            "lanes": "16,17,18,19",
+            "alias_at_lanes": "Eth5/1, Eth5/2, Eth5/3, Eth5/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet20": {
+            "index": "6,6,6,6",
+            "lanes": "20,21,22,23",
+            "alias_at_lanes": "Eth6/1, Eth6/2, Eth6/3, Eth6/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet24": {
+            "index": "7,7,7,7",
+            "lanes": "24,25,26,27",
+            "alias_at_lanes": "Eth7/1, Eth7/2, Eth7/3, Eth7/4",
+            "breakout_modes": "1x100G[40G],4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet28": {
+            "index": "8,8,8,8",
+            "lanes": "28,29,30,31",
+            "alias_at_lanes": "Eth8/1, Eth8/2, Eth8/3, Eth8/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet32": {
+            "index": "9,9,9,9",
+            "lanes": "32,33,34,35",
+            "alias_at_lanes": "Eth9/1, Eth9/2, Eth9/3, Eth9/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet36": {
+            "index": "10,10,10,10",
+            "lanes": "36,37,38,39",
+            "alias_at_lanes": "Eth10/1, Eth10/2, Eth10/3, Eth10/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet40": {
+            "index": "11,11,11,11",
+            "lanes": "40,41,42,43",
+            "alias_at_lanes": "Eth11/1, Eth11/2, Eth11/3, Eth11/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet44": {
+            "index": "12,12,12,12",
+            "lanes": "44,45,46,47",
+            "alias_at_lanes": "Eth12/1, Eth12/2, Eth12/3, Eth12/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet48": {
+            "index": "13,13,13,13",
+            "lanes": "48,49,50,51",
+            "alias_at_lanes": "Eth13/1, Eth13/2, Eth13/3, Eth13/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet52": {
+            "index": "14,14,14,14",
+            "lanes": "52,53,54,55",
+            "alias_at_lanes": "Eth14/1, Eth14/2, Eth14/3, Eth14/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet56": {
+            "index": "15,15,15,15",
+            "lanes": "56,57,58,59",
+            "alias_at_lanes": "Eth15/1, Eth15/2, Eth15/3, Eth15/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet60": {
+            "index": "16,16,16,16",
+            "lanes": "60,61,62,63",
+            "alias_at_lanes": "Eth16/1, Eth16/2, Eth16/3, Eth16/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet64": {
+            "index": "17,17,17,17",
+            "lanes": "64,65,66,67",
+            "alias_at_lanes": "Eth17/1, Eth17/2, Eth17/3, Eth17/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet68": {
+            "index": "18,18,18,18",
+            "lanes": "68,69,70,71",
+            "alias_at_lanes": "Eth18/1, Eth18/2, Eth18/3, Eth18/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet72": {
+            "index": "19,19,19,19",
+            "lanes": "72,73,74,75",
+            "alias_at_lanes": "Eth19/1, Eth19/2, Eth19/3, Eth19/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet76": {
+            "index": "20,20,20,20",
+            "lanes": "76,77,78,79",
+            "alias_at_lanes": "Eth20/1, Eth20/2, Eth20/3, Eth20/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet80": {
+            "index": "21,21,21,21",
+            "lanes": "80,81,82,83",
+            "alias_at_lanes": "Eth21/1, Eth21/2, Eth21/3, Eth21/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet84": {
+            "index": "22,22,22,22",
+            "lanes": "84,85,86,87",
+            "alias_at_lanes": "Eth22/1, Eth22/2, Eth22/3, Eth22/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet88": {
+            "index": "23,23,23,23",
+            "lanes": "88,89,90,91",
+            "alias_at_lanes": "Eth23/1, Eth23/2, Eth23/3, Eth23/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet92": {
+            "index": "24,24,24,24",
+            "lanes": "92,93,94,95",
+            "alias_at_lanes": "Eth24/1, Eth24/2, Eth24/3, Eth24/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet96": {
+            "index": "25,25,25,25",
+            "lanes": "96,97,98,99",
+            "alias_at_lanes": "Eth25/1, Eth25/2, Eth25/3, Eth25/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet100": {
+            "index": "26,26,26,26",
+            "lanes": "100,101,102,103",
+            "alias_at_lanes": "Eth26/1, Eth26/2, Eth26/3, Eth26/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet104": {
+            "index": "27,27,27,27",
+            "lanes": "104,105,106,107",
+            "alias_at_lanes": "Eth27/1, Eth27/2, Eth27/3, Eth27/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet108": {
+            "index": "28,28,28,28",
+            "lanes": "108,109,110,111",
+            "alias_at_lanes": "Eth28/1, Eth28/2, Eth28/3, Eth28/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet112": {
+            "index": "29,29,29,29",
+            "lanes": "112,113,114,115",
+            "alias_at_lanes": "Eth29/1, Eth29/2, Eth29/3, Eth29/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet116": {
+            "index": "30,30,30,30",
+            "lanes": "116,117,118,119",
+            "alias_at_lanes": "Eth30/1, Eth30/2, Eth30/3, Eth30/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet120": {
+            "index": "31,31,31,31",
+            "lanes": "120,121,122,123",
+            "alias_at_lanes": "Eth31/1, Eth31/2, Eth31/3, Eth31/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        },
+        "Ethernet124": {
+            "index": "32,32,32,32",
+            "lanes": "124,125,126,127",
+            "alias_at_lanes": "Eth32/1, Eth32/2, Eth32/3, Eth32/4",
+            "breakout_modes": "1x100G[40G],2x50G,4x25G[10G],2x25G(2)+1x50G(2),1x50G(2)+2x25G(2)"
+        }
+    }
+}
diff --git a/src/sonic-config-engine/tests/test_cfggen_platformJson.py b/src/sonic-config-engine/tests/test_cfggen_platformJson.py
new file mode 100644
index 000000000000..f94fcb4ab89b
--- /dev/null
+++ b/src/sonic-config-engine/tests/test_cfggen_platformJson.py
@@ -0,0 +1,76 @@
+from unittest import TestCase
+import subprocess
+import os
+import json
+import ast
+
+# Global Variable
+PLATFORM_OUTPUT_FILE = "platform_output.json"
+
+class TestCfgGenPlatformJson(TestCase):
+
+    def setUp(self):
+        self.test_dir = os.path.dirname(os.path.realpath(__file__))
+        self.script_file = os.path.join(self.test_dir, '..', 'sonic-cfggen')
+        self.sample_graph_simple = os.path.join(self.test_dir, 'simple-sample-graph.xml')
+        self.platform_json = os.path.join(self.test_dir, 'sample_platform.json')
+        self.hwsku_json = os.path.join(self.test_dir, 'sample_hwsku.json')
+
+    def run_script(self, argument, check_stderr=False):
+        print '\n    Running sonic-cfggen ' + argument
+        if check_stderr:
+            output = subprocess.check_output(self.script_file + ' ' + argument, stderr=subprocess.STDOUT, shell=True)
+        else:
+            output = subprocess.check_output(self.script_file + ' ' + argument, shell=True)
+
+        linecount = output.strip().count('\n')
+        if linecount <= 0:
+            print '    Output: ' + output.strip()
+        else:
+            print '    Output: ({0} lines, {1} bytes)'.format(linecount + 1, len(output))
+        return output
+
+    def test_dummy_run(self):
+        argument = ''
+        output = self.run_script(argument)
+        self.assertEqual(output, '')
+
+    def test_print_data(self):
+        argument = '-m "' + self.sample_graph_simple + '" --print-data'
+        output = self.run_script(argument)
+        self.assertTrue(len(output.strip()) > 0)
+
+    # Check whether all interfaces present or not as per platform.json
+    def test_platform_json_interfaces_keys(self):
+        argument = '-m "' + self.sample_graph_simple + '" -p "' + self.platform_json + '" -S "' + self.hwsku_json + '" -v "PORT.keys()"'
+        output = self.run_script(argument)
+        expected = "['Ethernet8', 'Ethernet9', 'Ethernet36', 'Ethernet98', 'Ethernet0', 'Ethernet6', 'Ethernet4', 'Ethernet109', 'Ethernet108', 'Ethernet18', 'Ethernet100', 'Ethernet34', 'Ethernet104', 'Ethernet106', 'Ethernet94', 'Ethernet126', 'Ethernet96', 'Ethernet124', 'Ethernet90', 'Ethernet91', 'Ethernet92', 'Ethernet93', 'Ethernet50', 'Ethernet51', 'Ethernet52', 'Ethernet53', 'Ethernet54', 'Ethernet99', 'Ethernet56', 'Ethernet113', 'Ethernet76', 'Ethernet74', 'Ethernet39', 'Ethernet72', 'Ethernet73', 'Ethernet70', 'Ethernet71', 'Ethernet32', 'Ethernet33', 'Ethernet16', 'Ethernet111', 'Ethernet10', 'Ethernet11', 'Ethernet12', 'Ethernet13', 'Ethernet58', 'Ethernet19', 'Ethernet59', 'Ethernet38', 'Ethernet78', 'Ethernet68', 'Ethernet14', 'Ethernet89', 'Ethernet88', 'Ethernet118', 'Ethernet119', 'Ethernet116', 'Ethernet114', 'Ethernet80', 'Ethernet112', 'Ethernet86', 'Ethernet110', 'Ethernet84', 'Ethernet31', 'Ethernet49', 'Ethernet48', 'Ethernet46', 'Ethernet30', 'Ethernet29', 'Ethernet40', 'Ethernet120', 'Ethernet28', 'Ethernet66', 'Ethernet60', 'Ethernet64', 'Ethernet44', 'Ethernet20', 'Ethernet79', 'Ethernet69', 'Ethernet24', 'Ethernet26']"
+
+        self.assertEqual(sorted(output.strip()), sorted(expected))
+
+    # Check specific Interface with it's proper configuration as per platform.json
+    def test_platform_json_specific_ethernet_interfaces(self):
+
+        argument = '-m "' + self.sample_graph_simple + '" -p "' + self.platform_json + '" -S "' + self.hwsku_json  + '" -v "PORT[\'Ethernet8\']"'
+        output = self.run_script(argument)
+        expected = "{'index': '3', 'lanes': '8', 'description': 'Eth3/1', 'admin_status': 'up', 'mtu': '9100', 'alias': 'Eth3/1', 'pfc_asym': 'off', 'speed': '25000'}"
+        self.assertEqual(output.strip(), expected)
+
+        argument = '-m "' + self.sample_graph_simple + '" -p "' + self.platform_json + '" -S "' + self.hwsku_json  + '" -v "PORT[\'Ethernet112\']"'
+        output = self.run_script(argument)
+        expected = "{'index': '29', 'lanes': '112', 'description': 'Eth29/1', 'admin_status': 'up', 'mtu': '9100', 'alias': 'Eth29/1', 'pfc_asym': 'off', 'speed': '25000'}"
+        self.assertEqual(output.strip(), expected)
+
+    # Check all Interface with it's proper configuration as per platform.json
+    def test_platform_json_all_ethernet_interfaces(self):
+        argument = '-m "' + self.sample_graph_simple + '" -p "' + self.platform_json + '" -S "' + self.hwsku_json  + '" -v "PORT"'
+        output = self.run_script(argument)
+
+        sample_file = os.path.join(self.test_dir, 'sample_output', PLATFORM_OUTPUT_FILE)
+        fh = open(sample_file, 'rb')
+        fh_data = json.load(fh)
+        fh.close()
+
+        output_dict = ast.literal_eval(output.strip())
+        expected = ast.literal_eval(json.dumps(fh_data))
+        self.assertDictEqual(output_dict, expected)
diff --git a/src/sonic-daemon-base/sonic_daemon_base/daemon_base.py b/src/sonic-daemon-base/sonic_daemon_base/daemon_base.py
index d3807bf91524..797110422dc9 100644
--- a/src/sonic-daemon-base/sonic_daemon_base/daemon_base.py
+++ b/src/sonic-daemon-base/sonic_daemon_base/daemon_base.py
@@ -27,7 +27,7 @@
 
 # Port config information
 PORT_CONFIG = 'port_config.ini'
-PORTMAP = 'portmap.ini'
+PLATFORM_JSON = 'platform.json'
 
 EEPROM_MODULE_NAME = 'eeprom'
 EEPROM_CLASS_NAME = 'board'
@@ -151,11 +151,12 @@ def get_path_to_port_config_file(self):
         # Get platform and hwsku path
         (platform_path, hwsku_path) = self.get_path_to_platform_and_hwsku()
 
-        # First check for the presence of the new 'port_config.ini' file
-        port_config_file_path = "/".join([hwsku_path, PORT_CONFIG])
+        # First check for the presence of the new 'platform.json' file
+        port_config_file_path = "/".join([platform_path, PLATFORM_JSON])
         if not os.path.isfile(port_config_file_path):
-            # port_config.ini doesn't exist. Try loading the legacy 'portmap.ini' file
-            port_config_file_path = "/".join([hwsku_path, PORTMAP])
+
+            # platform.json doesn't exist. Try loading the legacy 'port_config.ini' file
+            port_config_file_path = "/".join([hwsku_path, PORT_CONFIG])
             if not os.path.isfile(port_config_file_path):
                 raise IOError("Failed to detect port config file: %s" % (port_config_file_path))