+ vl_api_interface_index_t sw_if_index0;
+ vl_api_interface_index_t sw_if_index1;
+ option vat_help = "[<intfc0> | sw_if_index <swif0>] [<intfc1> | sw_if_index <swif1>] [disable]";
+};
+
+/** \brief enable / disable the network delay simulation output feature
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param enable_disable - enable or disable the feature
+ @param sw_if_index0 - interface
+*/
+autoreply define nsim_output_feature_enable_disable
+{
+ /* Client identifier, set from api_main.my_client_index */
+ u32 client_index;
+
+ /* Arbitrary context, so client can match reply to request */
+ u32 context;
+
+ /* Enable / disable the feature on the interfaces */
+ bool enable_disable;
+
+ /* Interface handles */
+ vl_api_interface_index_t sw_if_index;
+ option vat_help = "[<intfc> | sw_if_index <nnn> [disable]";