diff --git a/micronets-gw-service/app/dnsmasq_adapter.py b/micronets-gw-service/app/dnsmasq_adapter.py
index 6c81e88..e2f75ab 100644
--- a/micronets-gw-service/app/dnsmasq_adapter.py
+++ b/micronets-gw-service/app/dnsmasq_adapter.py
@@ -64,6 +64,8 @@ def write_micronets (self, outfile, micronets):
                     dns_server += "," + server
                 outfile.write ("dhcp-option=tag:{}, option:dns-server{}\n"
                                .format (micronet_id, dns_server))
+            if 'mtu' in micronet:
+                outfile.write (f"dhcp-option=tag:{micronet_id}, option:mtu,{micronet['mtu']}\n")
             outfile.write ("\n")
 
     def write_devices (self, outfile, devices):
@@ -85,4 +87,6 @@ def write_devices (self, outfile, devices):
                 outfile.write (f"\n# Device: {device_id}/(\"{device_name}\")\n")
                 outfile.write ("dhcp-host={},{},set:{},{},{}\n"
                                .format (mac_addr, short_device_id, device_id, ip_addr, lease_period))
+                if 'mtu' in device:
+                    outfile.write (f"dhcp-option=tag:{device_id}, option:mtu,{device['mtu']}\n")
             outfile.write ("\n")
diff --git a/micronets-gw-service/app/gateway_service_api.py b/micronets-gw-service/app/gateway_service_api.py
index 638a689..63111c5 100644
--- a/micronets-gw-service/app/gateway_service_api.py
+++ b/micronets-gw-service/app/gateway_service_api.py
@@ -131,7 +131,8 @@ async def get_interfaces ():
     return await get_conf_model().get_interfaces(medium=medium_param)
 
 def check_micronet (micronet, micronet_id=None, required=True):
-    check_for_unrecognized_entries (micronet, ['micronetId','ipv4Network','nameservers','interface','vlan','name'])
+    check_for_unrecognized_entries (micronet, ['micronetId', 'ipv4Network', 'nameservers', 'interface', 'vlan',
+                                               'name', 'mtu'])
     body_micronet_id = check_field (micronet, 'micronetId', str, required)
     if micronet_id and body_micronet_id:
         if micronet_id != body_micronet_id:
@@ -146,6 +147,7 @@ def check_micronet (micronet, micronet_id=None, required=True):
     check_field (micronet, 'interface', str, required)
     check_vlan (micronet, 'vlan', False) # Optional
     check_field (micronet, 'name', str, False)
+    check_field (micronet, 'mtu', int, False)
 
 def check_micronets (micronets, required):
     for micronet in micronets:
@@ -318,7 +320,7 @@ def check_portspec (container, field_name, required):
 
 async def check_device (device, required):
     check_for_unrecognized_entries (device, ['deviceId', 'macAddress', 'networkAddress', 'psk', 'outRules', 'inRules',
-                                             'allowHosts','denyHosts','name'])
+                                             'allowHosts','denyHosts','name','mtu'])
     device_id = check_field (device, 'deviceId', str, required)
     if device_id:
         device_id = device_id.lower ()
@@ -347,6 +349,7 @@ async def check_device (device, required):
     await check_hostspecs (device, 'allowHosts', False)
     await check_hostspecs (device, 'denyHosts', False)
     check_field (device, 'name', str, False)
+    check_field (device, 'mtu', int, False)
 
 async def check_devices (devices, required):
     for device in devices:
diff --git a/micronets-gw-service/app/netreach_adapter.py b/micronets-gw-service/app/netreach_adapter.py
index 333a513..29e055c 100644
--- a/micronets-gw-service/app/netreach_adapter.py
+++ b/micronets-gw-service/app/netreach_adapter.py
@@ -54,6 +54,7 @@ def __init__ (self, config):
         self.use_device_pass = bool(config.get('NETREACH_ADAPTER_USE_DEVICE_PASS', "False"))
         self.psk_cache_enabled = bool(config.get('NETREACH_ADAPTER_PSK_CACHE_ENABLED', "True"))
         self.psk_cache_expire_s = config.get('NETREACH_ADAPTER_PSK_CACHE_EXPIRE_S', 120)
+        self.device_mtu = config.get('NETREACH_ADAPTER_DEVICE_MTU', 0)
         self.tunnel_man = NetreachApNetworkManager(config, self)
         self.api_token = None
         self.api_token_refresh = None
@@ -445,6 +446,9 @@ async def _setup_micronets_for_ap(self, service_list, service_device_list):
                         "nameservers": [micronet_gateway]
                     }
                 }
+
+                if self.device_mtu:
+                    micronet_to_add['micronet']['mtu'] = self.device_mtu
                 logger.info(f"NetreachAdapter:_setup_micronets_for_ap: micronet: {json.dumps(micronet_to_add, indent=4)}")
                 result = await micronets_api.post(f"{self.micronets_api_prefix}/micronets",
                                                   json=micronet_to_add)
diff --git a/micronets-gw-service/config.py b/micronets-gw-service/config.py
index 02a7903..51a8f32 100644
--- a/micronets-gw-service/config.py
+++ b/micronets-gw-service/config.py
@@ -80,6 +80,7 @@ class NetreachDefaultSettings():
                                        "options:remote_ip={remote_vxlan_host} " \
                                        "options:key={vxlan_conn_key}"
     NETREACH_ADAPTER_VXLAN_DISCONNECT_CMD = "/usr/bin/ovs-vsctl del-port {vxlan_port_name}"
+    NETREACH_ADAPTER_DEVICE_MTU = 1430
 
 #
 # Configure settings for local/development testing