+Update And Verify L2Gateway
+ [Arguments] ${bridge_name} ${gw_name} ${intf_name_1} ${intf_name_2}
+ [Documentation] Keyword to add interface {intf_name_2} to an existing L2 Gateway ${gw_name} for bridge ${bridge_name} (Using Neutron CLI).
+ ${l2gw_output}= OpenStackOperations.Update L2Gateway ${bridge_name} ${gw_name} ${intf_name_1} ${intf_name_2}
+ ${output}= OpenStackOperations.Get All L2Gateway
+ Log ${output}
+ Should Contain ${output} ${gw_name}
+ Should Contain ${output} ${intf_name_1}
+ Should Contain ${output} ${intf_name_2}
+ @{list_to_check}= Create List ${gw_name}
+ Utils.Check For Elements At URI ${L2GW_LIST_REST_URL} ${list_to_check} session
+ [Return] ${l2gw_output}
+