Configuration Example For Circular Dial String Backup And Internet Access - HPE FlexNetwork MSR series Configuration Manual

Configuration example for circular dial string backup and
Internet access
Network requirements
As shown in
•
Router B operates as an access server and is configured with an IP address of 100.1.1.254/24.
It uses the address range of 100.1.1.1/24 to 100.1.1.16/24 for address assignment. The PSTN
dial strings available on it are 8810048 through 8810055, allowing the router to provide services
to 16 online users.
•
Router A accepts the IP address assigned by Router B.
Configure Router A on the dialup side to implement cyclic dial string backup with dialer routes.
Configure Router B on the access side to use asynchronous serial interfaces to provide DDR dialup
access and adopt PAP to authenticate the dialup side.
As shown in
B. The only difference is that Router D uses an ISDN dial string 8810048 rather than PSTN dial
strings to provide services.
Configure Router C and Router D to implement DDR with one dial string and use CHAP for
authentication.
Figure 64 Network diagram for dial string backup/Internet access service (PSTN mode)
Router A
Ser2/1/0
......
Host
Figure 64:
Figure 65, Router C and Router D have the same configurations as Router A and Router
Modem
Modem
PSTN
Modem
Modem
8810048
Modem
Asy2/4/0 to
8810049
Asy2/4/7
Router B
......
Modem
8810054
Modem
8810055
207
Internet