- * pretend the session is up and skip the walk.
- * If we set it down then we get traffic loss on new children.
- * if we walk then we lose traffic for existing children. Wait
- * for the first BFD UP/DOWN before we let the session's state
- * influence forwarding.
+ * it would be best here if we could ignore this create and just
+ * wait for the first update, but this is not possible because
+ * BFD sessions are created in the down state, and can remain this
+ * way without transitioning to another state if the peer is
+ * unresponsive. So we have to assume down and wait for up.