diff --git a/src/network/utils/sequence-number.h b/src/network/utils/sequence-number.h
index 752e2e14e..1310b9363 100644
--- a/src/network/utils/sequence-number.h
+++ b/src/network/utils/sequence-number.h
@@ -469,6 +469,7 @@ std::istream & operator >> (std::istream &is, const SequenceNumber<NUMERIC_TYPE,
 typedef SequenceNumber<uint32_t, int32_t> SequenceNumber32;
 /// 16 bit Sequence number
 typedef SequenceNumber<uint16_t, int16_t> SequenceNumber16;
+/// 8 bit Sequence number
 typedef SequenceNumber<uint8_t, int8_t> SequenceNumber8;
 
 /**
diff --git a/src/network/utils/simple-net-device.cc b/src/network/utils/simple-net-device.cc
index e477a6f96..a85541c36 100644
--- a/src/network/utils/simple-net-device.cc
+++ b/src/network/utils/simple-net-device.cc
@@ -36,10 +36,14 @@ namespace ns3 {
 NS_LOG_COMPONENT_DEFINE ("SimpleNetDevice");
 
 /**
- * \brief Internal tag to store source, destination and protocol of each packet.
+ * \brief SimpleNetDevice tag to store source, destination and protocol of each packet.
  */
 class SimpleTag : public Tag {
 public:
+  /**
+   * \brief Get the type ID.
+   * \return the object TypeId
+   */
   static TypeId GetTypeId (void);
   virtual TypeId GetInstanceTypeId (void) const;
 
@@ -47,21 +51,45 @@ public:
   virtual void Serialize (TagBuffer i) const;
   virtual void Deserialize (TagBuffer i);
 
+  /**
+   * Set the source address
+   * \param src source address
+   */
   void SetSrc (Mac48Address src);
+  /**
+   * Get the source address
+   * \return the source address
+   */
   Mac48Address GetSrc (void) const;
 
+  /**
+   * Set the destination address
+   * \param dst destination address
+   */
   void SetDst (Mac48Address dst);
+  /**
+   * Get the destination address
+   * \return the destination address
+   */
   Mac48Address GetDst (void) const;
 
+  /**
+   * Set the protocol number
+   * \param proto protocol number
+   */
   void SetProto (uint16_t proto);
+  /**
+   * Get the protocol number
+   * \return the protocol number
+   */
   uint16_t GetProto (void) const;
 
   void Print (std::ostream &os) const;
 
 private:
-  Mac48Address m_src;
-  Mac48Address m_dst;
-  uint16_t m_protocolNumber;
+  Mac48Address m_src; //!< source address
+  Mac48Address m_dst; //!< destination address
+  uint16_t m_protocolNumber; //!< protocol number
 };