diff --git a/src/vnet/interface.api b/src/vnet/interface.api
index 0cebd00..d8d9198 100644
--- a/src/vnet/interface.api
+++ b/src/vnet/interface.api
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-option version = "2.2.1";
+option version = "2.3.0";
 
 import "vnet/interface_types.api";
 
@@ -77,7 +77,6 @@
   u8  enable;
 };
 
-
 /** \brief Interface Event generated by want_interface_events
     @param client_index - opaque cookie to identify the sender
     @param pid - client pid registered to receive notification
@@ -112,7 +111,7 @@
 
 /** \brief Interface details structure (fix this) 
     @param sw_if_index - index of the interface
-    @param sup_sw_if_index - index of parent interface if any, else same as sw_if_index  
+    @param sup_sw_if_index - index of parent interface if any, else same as sw_if_index
     @param l2_address_length - length of the interface's l2 address
     @param pid - the interface's l2 address
     @param interface_name - name of the interface
@@ -194,7 +193,7 @@
   u32 vtr_tag1;			// first pushed tag
   u32 vtr_tag2;			// second pushed tag
   u8 tag[64];
-  
+
   /* pbb tag rewrite info */
   u16 outer_tag;
   u8  b_dmac[6];
@@ -206,11 +205,11 @@
 /** \brief Request all or filtered subset of sw_interface_details
     @param client_index - opaque cookie to identify the sender
     @param context - sender context, to match reply w/ request
-    @param sw_if_index - ~0 if ignore, index of the interface to filter on
+    @param sw_if_index - index of the interface to dump info on, ~0 if on all
     @param name_filter_valid - 1 if requesting a filtered subset of records else 0
+      if name filter is valid, sw_if_index value is effectively set to ~0
     @param name_filter - interface name substring filter. Eg. loop1 returns [loop1, loop10]
 */
-
 define sw_interface_dump
 {
   u32 client_index;
diff --git a/src/vnet/interface_api.c b/src/vnet/interface_api.c
index 993d12c..8b0cd8e 100644
--- a/src/vnet/interface_api.c
+++ b/src/vnet/interface_api.c
@@ -308,7 +308,7 @@
   u8 *filter = 0, *name = 0;
   sw_if_index = ntohl (mp->sw_if_index);
 
-  if (sw_if_index != ~0)
+  if (!mp->name_filter_valid && sw_if_index != ~0)
     {
       /* is it a valid sw_if_index/ */
       if (vec_len (im->sw_interfaces) <= sw_if_index)
@@ -316,8 +316,6 @@
 
       swif = vec_elt_at_index (im->sw_interfaces, sw_if_index);
 
-      /* If we have a sw_if_index, ignore the name filter. */
-      mp->name_filter_valid = 0;
       vec_reset_length (name);
       name =
 	format (name, "%U%c", format_vnet_sw_interface_name, am->vnet_main,