Optional feature configuration

© 2004 Cisco Systems, Inc. All rights reserved. bcran v2.1—6-5

To configure an ISDN BRI interface on a router, you must use specific global and interface configuration commands.

Global configuration includes these steps:

Step 1 Select the switch type that matches the ISDN provider switch at the central office (CO).

Step 2 Set destination details. Indicate static routes from the router to other ISDN destinations.

Step 3 Specify the traffic criteria that initiate an ISDN call to the appropriate destination. Interface configuration includes these steps:

Step 1 Select the ISDN BRI port and configure an IP address and subnet mask.

Although the interface automatically inherits the global switch-type setting, some configurations may require a specific switch type to be configured on an interface.

Step 2 Specify the encapsulation if it is not HDLC. If PPP encapsulation is selected

(typical), configure PPP including authentication, callback, and multilink options. Step 3 Configure ISDN addressing and any parameters supplied by the ISDN service provider.

Step 4 Configure DDR information and calling parameters.

Step 5 Configure optional features, including time-to-wait for the ISDN carrier to respond to the call, and seconds of idle time before the router times out and drops the call.

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