Release Notes for Router Software Version 11.00 Revision 4n
28 114968-A Rev. A
You configure this unused port on the same subnet as the demand circuit of the
remote router. The demand circuit then connects to the router independent of the
initial point-to-point circuit.
In the diagram, Router A’s disabled port is S22. Port S22 has address 2.1.1.1,
which is the same subnet as the demand interface on Router B. For Router A, you
configure S22 as the disabled primary circuit and S23 as its backup circuit. Also,
Router A’s is set to slave mode, so it waits for the incoming call from Router B.
When the point-to-point circuit fails at S21, Router B establishes a demand circuit
to Router A. Router A receives the call and brings up the backup circuit on S23.
Once the demand connection is established, it remains active until you manually
terminate the connection using the Technician Interface command
force takedown. Even when the point-to-point circuit recovers, if its routing
protocol rule precedence is lower than the demand circuit’s precedence, data
continues to flow over the demand connection until you terminate it. By manually
terminating the connection, you control when the router returns to the
point-to-point circuit for transmission.
To configure this application, do the following:
1. Using Site Manager, create a point-to-point circuit on one router.
2. Using Site Manager, configure dial backup service for one router, for
example, a central site router, then disable the primary interface.
3. Using Site Manager, create a demand pool and circuit on a remote router.
This demand circuit will act as the backup circuit. Do not configure a backup
circuit from Site Manager.
4. Using the Technician Interface, set the wfSwserv0ptsBackupCct attribute
of the router with the demand circuit configured to the point-to-point
circuit number (for example, S21 in the diagram).
5. Set the Rule Precedence parameter of each circuit’s routing protocol to
designate which circuit the router will consider preferable.
