diff --git a/spyglass/data_extractor/custom_exceptions.py b/spyglass/data_extractor/custom_exceptions.py
index 46f3a8a..f43a69f 100644
--- a/spyglass/data_extractor/custom_exceptions.py
+++ b/spyglass/data_extractor/custom_exceptions.py
@@ -26,6 +26,15 @@ class BaseError(Exception):
         sys.exit(1)
 
 
+class NoSpecMatched(BaseError):
+    def __init__(self, excel_specs):
+        self.specs = excel_specs
+
+    def display_error(self):
+        print('No spec matched. Following are the available specs:\n'.format(
+            self.specs))
+        sys.exit(1)
+
 class MissingAttributeError(BaseError):
     pass
 
diff --git a/spyglass/data_extractor/plugins/tugboat/excel_parser.py b/spyglass/data_extractor/plugins/tugboat/excel_parser.py
new file mode 100644
index 0000000..83e4f85
--- /dev/null
+++ b/spyglass/data_extractor/plugins/tugboat/excel_parser.py
@@ -0,0 +1,410 @@
+# Copyright 2018 AT&T Intellectual Property.  All other rights reserved.
+#
+# 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.
+
+import logging
+import pprint
+import re
+import sys
+import yaml
+from openpyxl import load_workbook
+from openpyxl import Workbook
+from spyglass.data_extractor.custom_exceptions import
+    NoSpecMatched, )
+# from spyglass.data_extractor.custom_exceptions
+
+LOG = logging.getLogger(__name__)
+
+
+class ExcelParser():
+    """ Parse data from excel into a dict """
+
+    def __init__(self, file_name, excel_specs):
+        self.file_name = file_name
+        with open(excel_specs, 'r') as f:
+            spec_raw_data = f.read()
+        self.excel_specs = yaml.safe_load(spec_raw_data)
+        # A combined design spec, returns a workbok object after combining
+        # all the inputs excel specs
+        combined_design_spec = self.combine_excel_design_specs(file_name)
+        self.wb_combined = combined_design_spec
+        self.filenames = file_name
+        self.spec = 'xl_spec'
+
+    @staticmethod
+    def sanitize(string):
+        """ Remove extra spaces and convert string to lower case """
+        return string.replace(' ', '').lower()
+
+    def compare(self, string1, string2):
+        """ Compare the strings """
+        return bool(re.search(self.sanitize(string1), self.sanitize(string2)))
+
+    def validate_sheet(self, spec, sheet):
+        """ Check if the sheet is correct or not """
+        ws = self.wb_combined[sheet]
+        header_row = self.excel_specs['specs'][spec]['header_row']
+        ipmi_header = self.excel_specs['specs'][spec]['ipmi_address_header']
+        ipmi_column = self.excel_specs['specs'][spec]['ipmi_address_col']
+        header_value = ws.cell(row=header_row, column=ipmi_column).value
+        return bool(self.compare(ipmi_header, header_value))
+
+    def find_correct_spec(self):
+        """ Find the correct spec """
+        for spec in self.excel_specs['specs']:
+            sheet_name = self.excel_specs['specs'][spec]['ipmi_sheet_name']
+            for sheet in self.wb_combined.sheetnames:
+                if self.compare(sheet_name, sheet):
+                    self.excel_specs['specs'][spec]['ipmi_sheet_name'] = sheet
+                    if self.validate_sheet(spec, sheet):
+                        return spec
+        raise NoSpecMatched(self.excel_specs)
+
+    def get_ipmi_data(self):
+        """ Read IPMI data from the sheet """
+        ipmi_data = {}
+        hosts = []
+        provided_sheetname = self.excel_specs['specs'][self.
+                                                       spec]['ipmi_sheet_name']
+        workbook_object, extracted_sheetname = self.get_xl_obj_and_sheetname(
+            provided_sheetname)
+        if workbook_object is not None:
+            ws = workbook_object[extracted_sheetname]
+        else:
+            ws = self.wb_combined[provided_sheetname]
+        row = self.excel_specs['specs'][self.spec]['start_row']
+        end_row = self.excel_specs['specs'][self.spec]['end_row']
+        hostname_col = self.excel_specs['specs'][self.spec]['hostname_col']
+        ipmi_address_col = self.excel_specs['specs'][self.
+                                                     spec]['ipmi_address_col']
+        host_profile_col = self.excel_specs['specs'][self.
+                                                     spec]['host_profile_col']
+        ipmi_gateway_col = self.excel_specs['specs'][self.
+                                                     spec]['ipmi_gateway_col']
+        previous_server_gateway = None
+        while row <= end_row:
+            hostname = self.sanitize(
+                ws.cell(row=row, column=hostname_col).value)
+            hosts.append(hostname)
+            ipmi_address = ws.cell(row=row, column=ipmi_address_col).value
+            if '/' in ipmi_address:
+                ipmi_address = ipmi_address.split('/')[0]
+            ipmi_gateway = ws.cell(row=row, column=ipmi_gateway_col).value
+            if ipmi_gateway:
+                previous_server_gateway = ipmi_gateway
+            else:
+                ipmi_gateway = previous_server_gateway
+            host_profile = ws.cell(row=row, column=host_profile_col).value
+            try:
+                if host_profile is None:
+                    raise RuntimeError("No value read from {} ".format(
+                        self.file_name) + "sheet:{} row:{}, col:{}".format(
+                            self.spec, row, host_profile_col))
+            except RuntimeError as rerror:
+                LOG.critical(rerror)
+                sys.exit("Tugboat exited!!")
+            ipmi_data[hostname] = {
+                'ipmi_address': ipmi_address,
+                'ipmi_gateway': ipmi_gateway,
+                'host_profile': host_profile,
+                'type': type,
+            }
+            row += 1
+        LOG.debug("ipmi data extracted from excel:\n{}".format(
+            pprint.pformat(ipmi_data)))
+        LOG.debug("host data extracted from excel:\n{}".format(
+            pprint.pformat(hosts)))
+        return [ipmi_data, hosts]
+
+    def get_private_vlan_data(self, ws):
+        """ Get private vlan data from private IP sheet """
+        vlan_data = {}
+        row = self.excel_specs['specs'][self.spec]['vlan_start_row']
+        end_row = self.excel_specs['specs'][self.spec]['vlan_end_row']
+        type_col = self.excel_specs['specs'][self.spec]['net_type_col']
+        vlan_col = self.excel_specs['specs'][self.spec]['vlan_col']
+        while row <= end_row:
+            cell_value = ws.cell(row=row, column=type_col).value
+            if cell_value:
+                vlan = ws.cell(row=row, column=vlan_col).value
+                if vlan:
+                    vlan = vlan.lower()
+                vlan_data[vlan] = cell_value
+            row += 1
+        LOG.debug("vlan data extracted from excel:\n%s",
+                  pprint.pformat(vlan_data))
+        return vlan_data
+
+    def get_private_network_data(self):
+        """ Read network data from the private ip sheet """
+        provided_sheetname = self.excel_specs['specs'][
+            self.spec]['private_ip_sheet']
+        workbook_object, extracted_sheetname = self.get_xl_obj_and_sheetname(
+            provided_sheetname)
+        if workbook_object is not None:
+            ws = workbook_object[extracted_sheetname]
+        else:
+            ws = self.wb_combined[provided_sheetname]
+        vlan_data = self.get_private_vlan_data(ws)
+        network_data = {}
+        row = self.excel_specs['specs'][self.spec]['net_start_row']
+        end_row = self.excel_specs['specs'][self.spec]['net_end_row']
+        col = self.excel_specs['specs'][self.spec]['net_col']
+        vlan_col = self.excel_specs['specs'][self.spec]['net_vlan_col']
+        old_vlan = ''
+        while row <= end_row:
+            vlan = ws.cell(row=row, column=vlan_col).value
+            if vlan:
+                vlan = vlan.lower()
+            network = ws.cell(row=row, column=col).value
+            if vlan and network:
+                net_type = vlan_data[vlan]
+                if 'vlan' not in network_data:
+                    network_data[net_type] = {
+                        'vlan': vlan,
+                        'subnet': [],
+                    }
+            elif not vlan and network:
+                # If vlan is not present then assign old vlan to vlan as vlan
+                # value is spread over several rows
+                vlan = old_vlan
+            else:
+                row += 1
+                continue
+            network_data[vlan_data[vlan]]['subnet'].append(network)
+            old_vlan = vlan
+            row += 1
+        for network in network_data:
+            network_data[network]['is_common'] = True
+            """
+            if len(network_data[network]['subnet']) > 1:
+                network_data[network]['is_common'] = False
+            else:
+                network_data[network]['is_common'] = True
+        LOG.debug(
+            "private network data extracted from\
+                          excel:\n%s", pprint.pformat(network_data))
+            """
+        return network_data
+
+    def get_public_network_data(self):
+        """ Read public network data from public ip data """
+        network_data = {}
+        provided_sheetname = self.excel_specs['specs'][self.
+                                                       spec]['public_ip_sheet']
+        workbook_object, extracted_sheetname = self.get_xl_obj_and_sheetname(
+            provided_sheetname)
+        if workbook_object is not None:
+            ws = workbook_object[extracted_sheetname]
+        else:
+            ws = self.wb_combined[provided_sheetname]
+        oam_row = self.excel_specs['specs'][self.spec]['oam_ip_row']
+        oam_col = self.excel_specs['specs'][self.spec]['oam_ip_col']
+        oam_vlan_col = self.excel_specs['specs'][self.spec]['oam_vlan_col']
+        ingress_row = self.excel_specs['specs'][self.spec]['ingress_ip_row']
+        oob_row = self.excel_specs['specs'][self.spec]['oob_net_row']
+        col = self.excel_specs['specs'][self.spec]['oob_net_start_col']
+        end_col = self.excel_specs['specs'][self.spec]['oob_net_end_col']
+        network_data = {
+            'oam': {
+                'subnet': [ws.cell(row=oam_row, column=oam_col).value],
+                'vlan': ws.cell(row=oam_row, column=oam_vlan_col).value,
+            },
+            'ingress': ws.cell(row=ingress_row, column=oam_col).value,
+        }
+        network_data['oob'] = {
+            'subnet': [],
+        }
+        while col <= end_col:
+            cell_value = ws.cell(row=oob_row, column=col).value
+            if cell_value:
+                network_data['oob']['subnet'].append(self.sanitize(cell_value))
+            col += 1
+        LOG.debug(
+            "public network data extracted from\
+                          excel:\n%s", pprint.pformat(network_data))
+        return network_data
+
+    def get_site_info(self):
+        """ Read location, dns, ntp and ldap data"""
+        site_info = {}
+        provided_sheetname = self.excel_specs['specs'][
+            self.spec]['dns_ntp_ldap_sheet']
+        workbook_object, extracted_sheetname = self.get_xl_obj_and_sheetname(
+            provided_sheetname)
+        if workbook_object is not None:
+            ws = workbook_object[extracted_sheetname]
+        else:
+            ws = self.wb_combined[provided_sheetname]
+        dns_row = self.excel_specs['specs'][self.spec]['dns_row']
+        dns_col = self.excel_specs['specs'][self.spec]['dns_col']
+        ntp_row = self.excel_specs['specs'][self.spec]['ntp_row']
+        ntp_col = self.excel_specs['specs'][self.spec]['ntp_col']
+        domain_row = self.excel_specs['specs'][self.spec]['domain_row']
+        domain_col = self.excel_specs['specs'][self.spec]['domain_col']
+        login_domain_row = self.excel_specs['specs'][self.
+                                                     spec]['login_domain_row']
+        ldap_col = self.excel_specs['specs'][self.spec]['ldap_col']
+        global_group = self.excel_specs['specs'][self.spec]['global_group']
+        ldap_search_url_row = self.excel_specs['specs'][
+            self.spec]['ldap_search_url_row']
+        dns_servers = ws.cell(row=dns_row, column=dns_col).value
+        ntp_servers = ws.cell(row=ntp_row, column=ntp_col).value
+        try:
+            if dns_servers is None:
+                raise RuntimeError(
+                    "No value for dns_server from:{} Sheet:'{}' Row:{} Col:{}".
+                    format(self.file_name, provided_sheetname, dns_row,
+                           dns_col))
+                raise RuntimeError(
+                    "No value for ntp_server frome:{} Sheet:'{}' Row:{} Col:{}"
+                    .format(self.file_name, provided_sheetname, ntp_row,
+                            ntp_col))
+        except RuntimeError as rerror:
+            LOG.critical(rerror)
+            sys.exit("Tugboat exited!!")
+
+        dns_servers = dns_servers.replace('\n', ' ')
+        ntp_servers = ntp_servers.replace('\n', ' ')
+        if ',' in dns_servers:
+            dns_servers = dns_servers.split(',')
+        else:
+            dns_servers = dns_servers.split()
+        if ',' in ntp_servers:
+            ntp_servers = ntp_servers.split(',')
+        else:
+            ntp_servers = ntp_servers.split()
+        site_info = {
+            'location': self.get_location_data(),
+            'dns': dns_servers,
+            'ntp': ntp_servers,
+            'domain': ws.cell(row=domain_row, column=domain_col).value,
+            'ldap': {
+                'subdomain': ws.cell(row=login_domain_row,
+                                     column=ldap_col).value,
+                'common_name': ws.cell(row=global_group,
+                                       column=ldap_col).value,
+                'url': ws.cell(row=ldap_search_url_row, column=ldap_col).value,
+            }
+        }
+        LOG.debug(
+            "Site Info extracted from\
+                          excel:\n%s", pprint.pformat(site_info))
+        return site_info
+
+    def get_location_data(self):
+        """ Read location data from the site and zone sheet """
+        provided_sheetname = self.excel_specs['specs'][self.
+                                                       spec]['location_sheet']
+        workbook_object, extracted_sheetname = self.get_xl_obj_and_sheetname(
+            provided_sheetname)
+        if workbook_object is not None:
+            ws = workbook_object[extracted_sheetname]
+        else:
+            ws = self.wb_combined[provided_sheetname]
+        corridor_row = self.excel_specs['specs'][self.spec]['corridor_row']
+        column = self.excel_specs['specs'][self.spec]['column']
+        site_name_row = self.excel_specs['specs'][self.spec]['site_name_row']
+        state_name_row = self.excel_specs['specs'][self.spec]['state_name_row']
+        country_name_row = self.excel_specs['specs'][self.
+                                                     spec]['country_name_row']
+        clli_name_row = self.excel_specs['specs'][self.spec]['clli_name_row']
+        return {
+            'corridor': ws.cell(row=corridor_row, column=column).value,
+            'name': ws.cell(row=site_name_row, column=column).value,
+            'state': ws.cell(row=state_name_row, column=column).value,
+            'country': ws.cell(row=country_name_row, column=column).value,
+            'physical_location': ws.cell(row=clli_name_row,
+                                         column=column).value,
+        }
+
+    def validate_sheet_names_with_spec(self):
+        """ Checks is sheet name in spec file matches with excel file"""
+        spec = list(self.excel_specs['specs'].keys())[0]
+        spec_item = self.excel_specs['specs'][spec]
+        sheet_name_list = []
+        ipmi_header_sheet_name = spec_item['ipmi_sheet_name']
+        sheet_name_list.append(ipmi_header_sheet_name)
+        private_ip_sheet_name = spec_item['private_ip_sheet']
+        sheet_name_list.append(private_ip_sheet_name)
+        public_ip_sheet_name = spec_item['public_ip_sheet']
+        sheet_name_list.append(public_ip_sheet_name)
+        dns_ntp_ldap_sheet_name = spec_item['dns_ntp_ldap_sheet']
+        sheet_name_list.append(dns_ntp_ldap_sheet_name)
+        location_sheet_name = spec_item['location_sheet']
+        sheet_name_list.append(location_sheet_name)
+        try:
+            for sheetname in sheet_name_list:
+                workbook_object, extracted_sheetname = \
+                    self.get_xl_obj_and_sheetname(sheetname)
+                if workbook_object is not None:
+                    wb = workbook_object
+                    sheetname = extracted_sheetname
+                else:
+                    wb = self.wb_combined
+
+                if sheetname not in wb.sheetnames:
+                    raise RuntimeError(
+                        "SheetName '{}' not found ".format(sheetname))
+        except RuntimeError as rerror:
+            LOG.critical(rerror)
+            sys.exit("Tugboat exited!!")
+
+        LOG.info("Sheet names in excel spec validated")
+
+    def get_data(self):
+        """ Create a dict with combined data """
+        self.validate_sheet_names_with_spec()
+        ipmi_data = self.get_ipmi_data()
+        network_data = self.get_private_network_data()
+        public_network_data = self.get_public_network_data()
+        site_info_data = self.get_site_info()
+        data = {
+            'ipmi_data': ipmi_data,
+            'network_data': {
+                'private': network_data,
+                'public': public_network_data,
+            },
+            'site_info': site_info_data,
+        }
+        LOG.debug(
+            "Location data extracted from\
+                          excel:\n%s", pprint.pformat(data))
+        return data
+
+    def combine_excel_design_specs(self, filenames):
+        """ Combines multiple excel file to a single design spec"""
+        design_spec = Workbook()
+        for exel_file in filenames:
+            loaded_workbook = load_workbook(exel_file, data_only=True)
+            for names in loaded_workbook.sheetnames:
+                design_spec_worksheet = design_spec.create_sheet(names)
+                loaded_workbook_ws = loaded_workbook[names]
+                for row in loaded_workbook_ws:
+                    for cell in row:
+                        design_spec_worksheet[cell.
+                                              coordinate].value = cell.value
+        return design_spec
+
+    def get_xl_obj_and_sheetname(self, sheetname):
+        """
+        The logic confirms if the sheetname is specified for example as:
+            "MTN57a_AEC_Network_Design_v1.6.xlsx:Public IPs"
+        """
+        if (re.search('.xlsx', sheetname) or re.search('.xls', sheetname)):
+            """ Extract file name """
+            source_xl_file = sheetname.split(':')[0]
+            wb = load_workbook(source_xl_file, data_only=True)
+            return [wb, sheetname.split(':')[1]]
+        else:
+            return [None, sheetname]
diff --git a/spyglass/schemas/data_schema.json b/spyglass/schemas/data_schema.json
index 53182cc..7be761f 100644
--- a/spyglass/schemas/data_schema.json
+++ b/spyglass/schemas/data_schema.json
@@ -140,8 +140,11 @@
           "properties": {
             "subnet": {
               "description": "Subnet address of the network",
-              "type": "string",
-              "pattern": "^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])/([0-9]|[1-2][0-9]|3[0-2])$"
+              "type": "array",
+	      "items": {
+		"type": "string",
+              	"pattern": "^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])/([0-9]|[1-2][0-9]|3[0-2])$"
+		}
             },
             "vlan": {
               "description": "Vlan id of the network",
@@ -166,13 +169,8 @@
 		"pattern":"^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])/([0-9]|[1-2][0-9]|3[0-2])$"
 		}
 		]
+              }
             },
-            "vlan": {
-              "description": "Vlan id of the network",
-              "type": "string",
-              "pattern": "^([0-9]|[0-9][0-9]|[0-9][0-9][0-9]|[0-3][0-9][0-9][0-9]|40[0-9][0-5])$"
-            }
-          },
           "required": [
             "subnet"
           ]
@@ -182,8 +180,11 @@
           "properties": {
             "subnet": {
               "description": "Subnet address of the network",
+              "type": "array",
+	      "items": {
               "type": "string",
               "pattern": "^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])/([0-9]|[1-2][0-9]|3[0-2])$"
+	      }
             },
             "vlan": {
               "description": "Vlan id of the network",
@@ -201,18 +202,20 @@
           "properties": {
             "subnet": {
               "description": "Subnet address of the network",
+	      "type": "array",
+	      "items": {
               "type": "string",
               "pattern": "^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])/([0-9]|[1-2][0-9]|3[0-2])$"
+	      }
             },
             "vlan": {
               "description": "Vlan id of the network",
               "type": "string",
-              "pattern": "^([0-9]|[0-9][0-9]|[0-9][0-9][0-9]|[0-3][0-9][0-9][0-9]|40[0-9][0-5])$"
+              "pattern": "^([0-9]|[0-9][0-9]|[0-9][0-9][0-9]|[0-3][0-9][0-9][0-9]|40[0-9][0-5])?$"
             }
           },
           "required": [
-            "subnet",
-	    "vlan"
+            "subnet"
           ]
         },
           "pxe": {
@@ -220,8 +223,11 @@
           "properties": {
             "subnet": {
               "description": "Subnet address of the network",
+	      "type": "array",
+	      "items": {
               "type": "string",
               "pattern": "^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])/([0-9]|[1-2][0-9]|3[0-2])$"
+	      }
             },
             "vlan": {
               "description": "Vlan id of the network",
@@ -239,8 +245,11 @@
           "properties": {
             "subnet": {
               "description": "Subnet address of the network",
+	      "type": "array",
+	      "items": {
               "type": "string",
               "pattern": "^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])/([0-9]|[1-2][0-9]|3[0-2])$"
+	     }
             },
             "vlan": {
               "description": "Vlan id of the network",
@@ -252,8 +261,7 @@
             "subnet",
 	    "vlan"
           ]
-        }
-
+      }
       },
         "required" :[
           "calico",