Fix for default gateway issue

Signed-off-by: Prashanth Katti <prkatti1@in.ibm.com>
Change-Id: I15d2110b4acd087d37ba616f32c852febdadc2b6
diff --git a/lib/bmc_network_utils.robot b/lib/bmc_network_utils.robot
index 3c5592e..b4c6c79 100644
--- a/lib/bmc_network_utils.robot
+++ b/lib/bmc_network_utils.robot
@@ -522,3 +522,16 @@
     ...      Should Be Equal  ${status}  ${True}
     ...      msg=Configuration of valid IP Failed.
 
+
+Get BMC Default Gateway
+    [Documentation]  Get system default gateway.
+
+    ${route_info}=  Get BMC Route Info
+
+    ${lines}=  Get Lines Containing String  ${route_info}  default via
+    @{gateway_list}=  Split To Lines  ${lines}
+
+    # Extract first default gateway and return.
+    @{default_gw}=  Split String  ${gateway_list[0]}
+
+    [Return]  ${default_gw[2]}