Specifications

Chapter 7 Configuring Frame Relay
ISDN as a Backup Connection with Floating Static Routes
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Cisco 1700 Series Router Software Configuration Guide
78-5407-03
Configuring the ISDN Interface
Follow these steps to configure parameters for the ISDN interface, which connects
your router to the central-site router if for some reason the Frame Relay
connection fails.
Command Task
Step1
interface BRI0 Enter configuration mode for the ISDN
interface.
Step2
isdn spid1 555987601 Enter the SPID number assigned by the ISDN
service provider to the B1 channel.
This step is required only when the service
provider has assigned a SPID to your ISDN
line. Not all ISDN lines have SPIDs.
Step3
isdn spid2 555987602 Define the SPID number assigned by the
ISDN service provider to the B2 channel.
This step is required only when the service
provider has assigned a SPID to your ISDN
line. Not all ISDN lines have SPIDs.
Step4
ip unnumbered fastethernet0 Enable IP routing on this interface without
assigning an IP address.
Step5
encapsulation ppp Set the encapsulation method on this interface
to PPP.
Step6
ipx network 1234 Configure this interface with an IPX network
number.
Step7
ipx delay 200 Configure this interface to exchange routing
information while the ISDN line is up.
Routing updates do not bring up the ISDN
line if it is down.
Step8
no ip route-cache Disable fast switching and autonomous
switching on this interface.
Step9
ipx watchdog-spoof Set the router to respond to local server
watchdog packets on behalf of a remote client
(called spoofing).