diff --git a/src/service/clmcservice/__init__.py b/src/service/clmcservice/__init__.py
index c35e2ec20a48d8440e215eef52b0375582b45b17..07f8d88205d7c256156b54ed8fd0a3f8f2ea91ef 100644
--- a/src/service/clmcservice/__init__.py
+++ b/src/service/clmcservice/__init__.py
@@ -24,7 +24,6 @@
 
 
 # Python standard libs
-from json import load
 from os.path import dirname, abspath
 import os
 
@@ -54,10 +53,7 @@ def main(global_config, **settings):
     settings['influx_port'] = int(settings['influx_port'])  # the influx port setting must be converted to integer instead of a string
     settings['kapacitor_port'] = int(settings['kapacitor_port'])  # the kapacitor port setting must be converted to integer instead of a string
 
-    network_config_file_path = settings["network_configuration_path"]
-    with open(network_config_file_path) as f:
-        network = load(f)
-        settings["network_bandwidth"] = network["bandwidth"]
+    settings["network_bandwidth"] = 104857600  # TODO currently assumed fixed bandwidth across all links
 
     config = Configurator(settings=settings)
 
diff --git a/src/service/clmcservice/graphapi/views.py b/src/service/clmcservice/graphapi/views.py
index c3441afba313621425ba0512886e35d55164f34d..ca9e3a0ddf5868586e2497d3d9329d28ea0f68f5 100644
--- a/src/service/clmcservice/graphapi/views.py
+++ b/src/service/clmcservice/graphapi/views.py
@@ -25,12 +25,13 @@
 
 from clmcservice.graphapi.utilities import validate_json_queries_body, validate_graph_url_params, \
     build_network_graph, delete_network_graph, build_temporal_subgraph, delete_temporal_subgraph, validate_graph_rtt_params, RTT_CYPHER_QUERY_TEMPLATE
-from uuid import uuid4
 from influxdb import InfluxDBClient
 from py2neo import Graph
 from pyramid.httpexceptions import HTTPBadRequest, HTTPNotFound, HTTPServiceUnavailable, HTTPNotImplemented
 from pyramid.view import view_defaults, view_config
 from requests import exceptions, get
+from uuid import uuid4
+from json import load
 import logging
 
 
@@ -271,7 +272,16 @@ class GraphAPI(object):
             log.error("Unexpected error: {0}".format(msg))
             raise HTTPNotImplemented("The SDN controller failed to return a valid JSON response when querying for the network topology.")
 
-        clusters = {}  # TODO this mapping should be retrieved somehow
+        # TODO this is a temporary solution - currently the service router to clusters mapping is read from a file (which must be manually prepared beforehand)
+        clusters_file = self.request.registry.settings["network_configuration_path"]
+        try:
+            with open(clusters_file) as fh:
+                clusters = load(fh)
+        except Exception as e:
+            log.error("Unexpected error: {0}".format(e))
+            log.error("No service_router-to-cluster mapping was found while building the network topology.")
+            clusters = {}
+
         # build the network graph and retrieve the number of switch nodes and cluster nodes that were created
         switch_count, clusters_count = build_network_graph(graph, switches, links, clusters)
 
diff --git a/src/service/development.ini b/src/service/development.ini
index cbc930b6b81038ed0ef4b074d0ff0e674458e9b9..ea65782e94adf07bc350c65764a26a5c33159ad8 100644
--- a/src/service/development.ini
+++ b/src/service/development.ini
@@ -15,7 +15,7 @@ pyramid.includes = pyramid_debugtoolbar pyramid_exclog
 exclog.ignore =
 
 
-network_configuration_path = /vagrant/src/service/resources/GraphAPI/network_config.json
+network_configuration_path = /vagrant/src/service/resources/GraphAPI/network_clusters.json
 
 # PostgreSQL connection url
 sqlalchemy.url = postgresql://clmc:clmc_service@localhost:5432/whoamidb
diff --git a/src/service/production.ini b/src/service/production.ini
index 4d9613152f2ad78fe7bdab6c811a18b3fc8f3cec..083bb91d2bc1cae25c1021b93081c87ff5a3b73f 100644
--- a/src/service/production.ini
+++ b/src/service/production.ini
@@ -15,7 +15,7 @@ pyramid.includes = pyramid_exclog
 exclog.ignore =
 
 
-network_configuration_path = /opt/clmc/src/service/resources/GraphAPI/network_config.json
+network_configuration_path = /opt/clmc/src/service/resources/GraphAPI/network_clusters.json
 
 # PostgreSQL connection url
 sqlalchemy.url = postgresql://clmc:clmc_service@localhost:5432/whoamidb
diff --git a/src/service/resources/GraphAPI/network_clusters.json b/src/service/resources/GraphAPI/network_clusters.json
new file mode 100644
index 0000000000000000000000000000000000000000..40fe2629a6ab664643591eb95533bfe7613520b8
--- /dev/null
+++ b/src/service/resources/GraphAPI/network_clusters.json
@@ -0,0 +1,6 @@
+{
+  "172.20.231.11": "20-sr1-cluster1-cluster",
+  "172.20.231.18": "22-sr1-cluster1-cluster",
+  "172.20.231.17": "23-sr1-cluster1-cluster",
+  "172.20.231.2": "24-sr1-cluster1-cluster"
+}
\ No newline at end of file