anchor.diff:  1. (Optional) Decide on the number of TCP routes you want to support. For each
   TCP route, you must reserve a port. Configure your load balancer to forward the
   range of ports to the TCP routers. Skip this step if you have configured DNS to
  -resolve the TCP domain name to an instance of the TCP router. For more details
  -on configuring port reservations see the [Modify TCP port
  -reservations](#modify-ports) section below.
  +resolve the TCP domain name to an instance of the TCP router. For more information about
  +configuring port reservations, see [Modify TCP port
  +reservations](#modify-ports) below.
   
   
   1. <%= partial vars.tcp_port %>
  
positive.code:     </pre>
  
  <p class="note">
  <strong>Note:</strong> `reservable_ports` must not conflict
  with ports that are used by other processes on the TCP router instances.  Ports
  in the ephemeral port range should also be avoided for this reason. Recommended
  port ranges include those within `1024-2047` and `18000-32767` on default
  installations, but it is recommended that operators check what ports are
  available on  the TCP Router VMs directly to verify that no additional ports
  are in use. See <a href="https://github.com/cloudfoundry/routing-release/issues/184">this issue</a>
  for more details.
  </p>
  
  
negative.code: `routing.router_groups.write` scopes.
  
  1. In a terminal window, run `cf curl /routing/v1/router_groups` to view the
  `reservable_ports`. Record the `guid` from the output.<br>
  For example:
    <pre class="terminal">
    $ cf curl /routing/v1/router\_groups
      [
  