--- a/src/internet-node/ipv4.h	Wed May 16 16:39:32 2007 -0400
+++ b/src/internet-node/ipv4.h	Wed May 16 17:01:39 2007 -0400
@@ -43,9 +43,6 @@
 class TraceContext;
 
 
-/**
- * ::Send is always defined in subclasses.
- */
 class Ipv4 : public L3Protocol 
 {
 public:

--- a/src/node/i-ipv4.h	Wed May 16 16:39:32 2007 -0400
+++ b/src/node/i-ipv4.h	Wed May 16 17:01:39 2007 -0400
@@ -30,7 +30,9 @@
 class NetDevice;
 class Packet;
 class Ipv4Route;
-
+/**
+ * \brief IPv4
+ */
 class IIpv4 : public Interface
 {
 public:

--- a/src/node/ipv4-route.h	Wed May 16 16:39:32 2007 -0400
+++ b/src/node/ipv4-route.h	Wed May 16 17:01:39 2007 -0400
@@ -27,19 +27,33 @@
 #include "ipv4-address.h"
 
 namespace ns3 {
-
+/**
+ * \brief A record of an IPv4 route
+ */
 class Ipv4Route {
 public:
+  /**
+   * \brief This constructor does nothing
+   */
   Ipv4Route ();
+  /**
+   * \brief Copy Constructor
+   * \param route The route to copy
+   */
   Ipv4Route (Ipv4Route const &route);
 
   bool IsHost (void) const;
+  /**
+   * \return The IPv4 address of the destination of this route
+   */
   Ipv4Address GetDest (void) const;
 
   bool IsNetwork (void) const;
   Ipv4Address GetDestNetwork (void) const;
   Ipv4Mask GetDestNetworkMask (void) const;
-
+  /**
+   * \return True if this route is a default route; false otherwise
+   */
   bool IsDefault (void) const;
 
   bool IsGateway (void) const;