3Com MSR 50 Series Configuration Manual page 203

3com msr 30-16: software guide

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same as those of Router A and Router B, except 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 DCC with one dial string and use

CHAP for authentication.

Network diagram

Figure 32 Network diagram for dial string backup/access service with DCC (PSTN)

Figure 33 Network diagram for dial string backup/access service with DCC (ISDN)

Configuration procedure

Solution 1: Configure circular dial string backup on Router A on dialup side. On

Router B, configure C-DCC, allowing the router to set up connections on eight

asynchronous serial interfaces; configure C-DCC parameters on a dialer interface.

1 Configure Router A

# Configure a dial access control rule for dialer access group 1; create a local user

account userb for Router B and configure PPP authentication for the account.

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DCC Configuration Example

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