
Configuration Examples
A-17
Dial Backup over an ISDN Network
Figure A-4 shows dial backup service in an ISDN network. In this configuration,
the primary circuit is using PPP. At the end of this section, there are configuration
notes if the application uses Standard or Frame Relay protocols.
Figure A-4. Dial Backup in an ISDN Network
Configuration of Router 1
To configure Router 1:
1. Configure a leased, synchronous interface named S131.
2. Select PPP as the WAN protocol.
3. Select IP/RIP as the LAN protocol and configure the interface as follows:
a. IP Address: 140.1.1.1
b. Subnet Mask: 255.255.255.0
c. IP Adjacent Host Address: 140.1.1.2
4. From the Configuration Manager window, click on an ISDN1 connector.
5. Follow the path of configuration windows and set the parameters
according to Tables A-25 through A-32.
ISDN
Network
ASN
AN
Router 1 Router 2
S131
.1
S12
.2
140.11.0
ISDN 1
ISDN 1
Local Phone No: 4364444
Switch Type: NI1
CHAP Local Name: ASN
CHAP Secret: ISDN
Local Phone No: 4363333
Switch Type: NI1
CHAP Local Name: AN
CHAP Secret: ISDN
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