add info for extra static routes

arednServicesGuide/network_tools.rst

@@ -4,6 +4,11 @@ Network Management Tools
 
 There are several service programs that can assist in visualizing or mapping an AREDN |trade| network, as well as for viewing local RF conditions near your node. Some of these programs are discussed below.
 
+Manage Extra Static Routes
+--------------------------
+
+There may be cases when you need to create extra static routes to control the flow of network traffic through your node. You can maintain your extra routes by entering them into the ``/etc/aredn_include/static_routes`` file. You must login to your node at the command line and use the ``vi`` editor to manage the routes in this file. A helpful example is provided in the file, and you can view the `OpenWRT Static Routes <https://openwrt.org/docs/guide-user/network/routing/routes_configuration>`_ page for additional information about managing static routes.
+
 KG6WXC MeshMap Network Visualizer
 ---------------------------------