+<h2><a id="bi-directional-link-quality" name="bi-directional-link-quality">2.3 Bi-directional Link Quality</a></h2>
+<p>LEEP does not define or compute bi-directional link quality. LEEP
+provides a way to exchange sufficient information to compute in-bound
+and out-bound link qualities. These two link qualities can be used to
+compute the bi-directional link quality. One popular way to define the
+bi-directional link quality between a node pair (A,B) as the
+probability that a packet transmitted by A will be successfully
+received and acknowledged by B. This approach computes the
+bi-directional link quality of a node pair (A,B) as the product of the
+link quality of (A,B) and (B,A).</p>
+</div>
+<div class="section">