vnet_feature_next (&arc_next0, b0);
vnet_feature_next (&arc_next1, b1);
vnet_feature_next (&arc_next0, b0);
vnet_feature_next (&arc_next1, b1);
b0 = vlib_get_buffer (vm, bi0);
next0 = def_next;
vnet_feature_next (&arc_next0, b0);
b0 = vlib_get_buffer (vm, bi0);
next0 = def_next;
vnet_feature_next (&arc_next0, b0);