4000 Router Series Layer 2 - WAN Configuration Guide

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Figure 43 Network diagram for C-DDR application on ISDN

Figure 44 Network diagram for B-DDR application on ISDN

Configuration procedure

• Method 1: Use C-DDR to set up a connection through ISDN BRI or PRI, and configure DDR

parameters on physical interfaces.

a. Configure Router A:

# Create dialer access group 1 and configure a dial access rule for it.

<RouterA> system-view

[RouterA] dialer-group 1 rule ip permit

# Assign an IP address to interface BRI 1/0, enable C-DDR, and configure the dial strings for

calling Router B and Router C.

[RouterA] interface bri 1/0

[RouterA-Bri1/0] ip address 100.1.1.1 255.255.255.0

[RouterA-Bri1/0] dialer circular enable

[RouterA-Bri1/0] dialer-group 1

[RouterA-Bri1/0] dialer route ip 100.1.1.2 8810052

[RouterA-Bri1/0] dialer route ip 100.1.1.3 8810063

b. Configure Router B:

# Create dialer access group 2 and configure a dial access rule for it.