User Manual - Configuration Guide (Volume 3)
Versatile Routing Platform Chapter 1
DDR Configuration
1-52
Quidway(config-if-Serial0)# ppp authentication pap
1.6.12 DDR for Access Service
I. Networking requirements
We have designed the DDR implementation solution for access service by way of
asynchronous serial port and ISDN PRI interface. Here, it is supposed that the dial
string resources obtained by users from the telecom office are 8810048-8810055 and
8810148 respectively, serving 16 Internet users. In the configuration command, use
Serial2:15 to identify ISDN PRI interface created at cE1/PRI interface.
II. Networking diagram
Router A
PSTN
8810048 Modem
Modem
Modem
Modem Modem
Modem Modem Modem
8810055
8810054
8810053
8810052
8810051
88100508810049
Router A
ISDN
8810148
Access service using ISDN PRI interface
Access service using
asynchronous serial port
Figure DC-1-15 Networking diagram of the configuration example of DDR for access service
III. Configuration procedure
Solution 1: use Legacy DDR configuration mode, PPP PAP authentication and 8
asynchronous serial ports to realize:
Configure router A: