1 files changed, 5 insertions, 3 deletions

diff --git a/draft-schanzen-r5n.xml b/draft-schanzen-r5n.xml
index a583340..22da48f 100644
--- a/draft-schanzen-r5n.xml
+++ b/draft-schanzen-r5n.xml
@@ -554,9 +554,11 @@ Connectivity | |Underlay|  |Underlay|
           <tt>L2NSE = ESTIMATE_NETWORK_SIZE()</tt>
         </dt>
         <dd>
-          A procedure that provides estimates on the base-2 logarithm of the network size
-          <tt>L2NSE</tt>, that is the base-2 logarithm number of peers in the network,
-          for use by the routing algorithm.
+          A procedure that provides an estimate of the network size.
+          The result, <tt>L2NSE</tt>, must be the base-2 logarithm of the estimated number of peers in the network.
+          It is used by the routing algorithm.
+          If the underlay does not support a protocol for network size estimation (such as cite paper NSE) the value
+          <bcp14>MAY</bcp14> be provided as a configuration parameter to the implementation.
         </dd>
       </dl>
       <t>