diff --git a/nlsr_nhl.cpp b/nlsr_nhl.cpp
new file mode 100644
index 0000000..9675467
--- /dev/null
+++ b/nlsr_nhl.cpp
@@ -0,0 +1,46 @@
+#include <iostream>
+
+#include "nlsr_nhl.hpp"
+#include "nlsr_nexthop.hpp"
+
+using namespace std;
+
+static bool
+nexthopCompare(NextHop& nh1, NextHop& nh2){
+	return nh1.getConnectingFace()==nh2.getConnectingFace();
+}
+
+/** 
+Add next hop to the Next Hop list
+If next hop is new it is added
+If next hop already exists in next
+hop list then updates the route
+cost with new next hop's route cost
+*/
+
+void
+Nhl::addNextHop(NextHop& nh)
+{
+	std::list<NextHop >::iterator it = std::find_if( nexthopList.begin(), 
+									nexthopList.end(),	
+   								bind(&nexthopCompare, _1, nh));
+	if ( it == nexthopList.end() ){
+		nexthopList.push_back(nh);
+	}
+
+	(*it).setRouteCost(nh.getRouteCost());
+}
+
+
+ostream&
+operator<<(ostream& os, Nhl& nhl)
+{
+	std::list< NextHop > nexthopList = nhl.getNextHopList();
+	int i=1;
+	for( std::list<NextHop>::iterator it=nexthopList.begin(); 
+	                                            it!= nexthopList.end() ; it++,i++)
+	{
+		os << "Nexthop "<<i<<": "<<(*it)<<endl;
+	}
+	return os;
+}