diff --git a/server/src/com/cloud/network/element/F5ExternalLoadBalancerElement.java b/server/src/com/cloud/network/element/F5ExternalLoadBalancerElement.java
index 4d3fca11fc2..6a9a65fa969 100644
--- a/server/src/com/cloud/network/element/F5ExternalLoadBalancerElement.java
+++ b/server/src/com/cloud/network/element/F5ExternalLoadBalancerElement.java
@@ -38,7 +38,9 @@ import com.cloud.api.commands.ListExternalLoadBalancersCmd;
 import com.cloud.api.commands.ListF5LoadBalancerNetworksCmd;
 import com.cloud.api.commands.ListF5LoadBalancersCmd;
 import com.cloud.api.response.F5LoadBalancerResponse;
+import com.cloud.configuration.Config;
 import com.cloud.configuration.ConfigurationManager;
+import com.cloud.configuration.dao.ConfigurationDao;
 import com.cloud.dc.DataCenter;
 import com.cloud.dc.DataCenterVO;
 import com.cloud.dc.dao.DataCenterDao;
@@ -80,6 +82,7 @@ import com.cloud.network.rules.LbStickinessMethod.StickinessMethodType;
 import com.cloud.offering.NetworkOffering;
 import com.cloud.resource.ServerResource;
 import com.cloud.server.api.response.ExternalLoadBalancerResponse;
+import com.cloud.utils.NumbersUtil;
 import com.cloud.utils.component.Inject;
 import com.cloud.utils.exception.CloudRuntimeException;
 import com.cloud.vm.NicProfile;
@@ -103,6 +106,7 @@ public class F5ExternalLoadBalancerElement extends ExternalLoadBalancerDeviceMan
     @Inject NetworkExternalLoadBalancerDao _networkLBDao;
     @Inject NetworkDao _networkDao;
     @Inject HostDetailsDao _detailsDao;
+    @Inject ConfigurationDao _configDao;
 
     private boolean canHandle(Network config) {
         if (config.getGuestType() != Network.GuestType.Isolated || config.getTrafficType() != TrafficType.Guest) {
@@ -434,7 +438,12 @@ public class F5ExternalLoadBalancerElement extends ExternalLoadBalancerDeviceMan
         response.setPublicInterface(lbDetails.get("publicInterface"));
         response.setPrivateInterface(lbDetails.get("privateInterface"));
         response.setDeviceName(lbDeviceVO.getDeviceName());
-        response.setDeviceCapacity(lbDeviceVO.getCapacity());
+        if (lbDeviceVO.getCapacity() == 0) {
+            long defaultLbCapacity = NumbersUtil.parseLong(_configDao.getValue(Config.DefaultExternalLoadBalancerCapacity.key()), 50);
+            response.setDeviceCapacity(defaultLbCapacity);
+        } else {
+            response.setDeviceCapacity(lbDeviceVO.getCapacity());
+        }
         response.setInlineMode(lbDeviceVO.getIsInLineMode());
         response.setDedicatedLoadBalancer(lbDeviceVO.getIsDedicatedDevice());
         response.setProvider(lbDeviceVO.getProviderName());
diff --git a/server/src/com/cloud/network/element/JuniperSRXExternalFirewallElement.java b/server/src/com/cloud/network/element/JuniperSRXExternalFirewallElement.java
index 3eaf2bfd7f5..d779a98624e 100644
--- a/server/src/com/cloud/network/element/JuniperSRXExternalFirewallElement.java
+++ b/server/src/com/cloud/network/element/JuniperSRXExternalFirewallElement.java
@@ -37,7 +37,9 @@ import com.cloud.api.commands.ListExternalFirewallsCmd;
 import com.cloud.api.commands.ListSrxFirewallNetworksCmd;
 import com.cloud.api.commands.ListSrxFirewallsCmd;
 import com.cloud.api.response.SrxFirewallResponse;
+import com.cloud.configuration.Config;
 import com.cloud.configuration.ConfigurationManager;
+import com.cloud.configuration.dao.ConfigurationDao;
 import com.cloud.dc.DataCenter;
 import com.cloud.dc.DataCenterVO;
 import com.cloud.dc.DataCenter.NetworkType;
@@ -80,6 +82,7 @@ import com.cloud.offering.NetworkOffering;
 import com.cloud.offerings.dao.NetworkOfferingDao;
 import com.cloud.resource.ServerResource;
 import com.cloud.server.api.response.ExternalFirewallResponse;
+import com.cloud.utils.NumbersUtil;
 import com.cloud.utils.component.Inject;
 import com.cloud.utils.exception.CloudRuntimeException;
 import com.cloud.vm.NicProfile;
@@ -107,7 +110,8 @@ public class JuniperSRXExternalFirewallElement extends ExternalFirewallDeviceMan
     @Inject NetworkDao _networkDao;
     @Inject NetworkServiceMapDao _ntwkSrvcDao;
     @Inject HostDetailsDao _hostDetailDao;
-
+    @Inject ConfigurationDao _configDao;
+ 
     private boolean canHandle(Network network, Service service) {
         DataCenter zone = _configMgr.getZone(network.getDataCenterId());
         if ((zone.getNetworkType() == NetworkType.Advanced && network.getGuestType() != Network.GuestType.Isolated) || (zone.getNetworkType() == NetworkType.Basic && network.getGuestType() != Network.GuestType.Shared)) {
@@ -490,7 +494,12 @@ public class JuniperSRXExternalFirewallElement extends ExternalFirewallDeviceMan
         response.setId(fwDeviceVO.getId());
         response.setPhysicalNetworkId(fwDeviceVO.getPhysicalNetworkId());
         response.setDeviceName(fwDeviceVO.getDeviceName());
-        response.setDeviceCapacity(fwDeviceVO.getCapacity());
+        if (fwDeviceVO.getCapacity() == 0) {
+            long defaultFwCapacity = NumbersUtil.parseLong(_configDao.getValue(Config.DefaultExternalFirewallCapacity.key()), 50);
+            response.setDeviceCapacity(defaultFwCapacity);
+        } else {
+            response.setDeviceCapacity(fwDeviceVO.getCapacity());
+        }
         response.setProvider(fwDeviceVO.getProviderName());
         response.setDeviceState(fwDeviceVO.getDeviceState().name());
         response.setIpAddress(fwHost.getPrivateIpAddress());
diff --git a/server/src/com/cloud/network/element/NetscalerElement.java b/server/src/com/cloud/network/element/NetscalerElement.java
index 68f890eed25..913dfcd5962 100644
--- a/server/src/com/cloud/network/element/NetscalerElement.java
+++ b/server/src/com/cloud/network/element/NetscalerElement.java
@@ -47,7 +47,9 @@ import com.cloud.api.commands.DeleteNetscalerLoadBalancerCmd;
 import com.cloud.api.commands.ListNetscalerLoadBalancerNetworksCmd;
 import com.cloud.api.commands.ListNetscalerLoadBalancersCmd;
 import com.cloud.api.response.NetscalerLoadBalancerResponse;
+import com.cloud.configuration.Config;
 import com.cloud.configuration.ConfigurationManager;
+import com.cloud.configuration.dao.ConfigurationDao;
 import com.cloud.dc.DataCenter;
 import com.cloud.dc.DataCenterVO;
 import com.cloud.dc.DataCenter.NetworkType;
@@ -94,6 +96,7 @@ import com.cloud.network.rules.LbStickinessMethod.StickinessMethodType;
 import com.cloud.network.rules.StaticNat;
 import com.cloud.offering.NetworkOffering;
 import com.cloud.resource.ServerResource;
+import com.cloud.utils.NumbersUtil;
 import com.cloud.utils.component.Inject;
 import com.cloud.utils.db.DB;
 import com.cloud.utils.db.Transaction;
@@ -122,6 +125,7 @@ public class NetscalerElement extends ExternalLoadBalancerDeviceManagerImpl impl
     @Inject PhysicalNetworkDao _physicalNetworkDao;
     @Inject NetworkDao _networkDao;
     @Inject HostDetailsDao _detailsDao;
+    @Inject ConfigurationDao _configDao;
 
     private boolean canHandle(Network config, Service service) {
         DataCenter zone = _dcDao.findById(config.getDataCenterId());
@@ -462,7 +466,12 @@ public class NetscalerElement extends ExternalLoadBalancerDeviceManagerImpl impl
         response.setPublicInterface(lbDetails.get("publicInterface"));
         response.setPrivateInterface(lbDetails.get("privateInterface"));
         response.setDeviceName(lbDeviceVO.getDeviceName());
-        response.setDeviceCapacity(lbDeviceVO.getCapacity());
+        if (lbDeviceVO.getCapacity() == 0) {
+            long defaultLbCapacity = NumbersUtil.parseLong(_configDao.getValue(Config.DefaultExternalLoadBalancerCapacity.key()), 50);
+            response.setDeviceCapacity(defaultLbCapacity);
+        } else {
+            response.setDeviceCapacity(lbDeviceVO.getCapacity());
+        }
         response.setInlineMode(lbDeviceVO.getIsInLineMode());
         response.setDedicatedLoadBalancer(lbDeviceVO.getIsDedicatedDevice());
         response.setProvider(lbDeviceVO.getProviderName());