diff --git a/Python/etc/radvd.conf b/Python/etc/radvd.conf
index e81e4bd..2629892 100644
--- a/Python/etc/radvd.conf
+++ b/Python/etc/radvd.conf
@@ -34,6 +34,18 @@ for ip in rec:
 
 def router_adv(**kw):
     kw['rec'] = rec_tpl
+    kw.setdefault('other_prefixes', [])
+    
+    def prefix_section(pref):
+        """Renvoie la section de conf d'un prefixe additionnel"""
+        return """
+  prefix %s {
+    AdvOnLink on;
+    AdvAutonomous on;
+    AdvRouterAddr off;
+  };""" % pref
+    
+    kw['other_prefixes'] = '\n'.join(map(prefix_section, kw['other_prefixes']))
     print """
 interface %(iface)s
 {
@@ -45,6 +57,7 @@ interface %(iface)s
     AdvAutonomous on;
     AdvRouterAddr on;
   };
+  # Les routes supplémentaires:\n %(other_prefixes)s
 
   # Les récursifs:\n  %(rec)s
 
@@ -53,5 +66,9 @@ interface %(iface)s
     # NOTE: Je met \n parce qu'un "%" en début de ligne est remplacé par bcfg2 …
 
 router_adv(iface='crans', prefix='2a01:240:fe3d:4::/64')
-router_adv(iface='crans.3', prefix='2a01:240:fe3d:c04::/64')
+router_adv(iface='crans.3', prefix='2a01:240:fe3d:c04::/64',
+   other_prefixes=[
+        # ULA de management des bornes: fda8:5d34:a228:/48
+       'fda8:5d34:a228:c04::/64',
+   ])