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

<RouterB> system-view

[RouterB] dialer-group 2 rule ip permit

# Configure an IP address to interface BRI 2/4/0.

[RouterB] interface bri 2/4/0

[RouterB-Bri2/4/0] ip address 100.1.1.2 255.255.255.0

# Enable traditional DDR on the interface.

[RouterB-Bri2/4/0] dialer circular enable

# Associate the interface with dialer group 2.

[RouterB-Bri2/4/0] dialer-group 2

# Configure the dial string for calling Router A.

[RouterB-Bri2/4/0] dialer route ip 100.1.1.1 8810048

# Enable the interface to place return calls for ISDN calling number 8810048.

[RouterB-Bri2/4/0] dialer call-in 8810048 callback

Router-to-router PPP callback configuration example

Network requirements

As shown in Figure 63, configure PPP callback for traditional DDR, so that when Router A calls Router B,

Router B can make a return call.

Figure 63 Network diagram

Configuration procedure

Method 1: Use the dial string configured in the dialer route command to call back the client.

1. Configure Router A:

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

<RouterA> system-view

[RouterA] dialer-group 1 rule ip permit

# Configure an IP address for interface Serial 2/1/0.

[RouterA] interface serial 2/1/0

[RouterA-Serial2/1/0] ip address 100.1.1.1 255.255.255.0

# Configure the interface to operate as an asynchronous interface in protocol mode.

[RouterA-Serial2/1/0] physical-mode async

[RouterA-Serial2/1/0] async-mode protocol

# Enable traditional DDR on the interface.

[RouterA-Serial2/1/0] dialer circular enable

# Associate the interface with dialer group 1.

[RouterA-Serial2/1/0] dialer-group 1

# Configure the dial string for calling Router B.

[RouterA-Serial2/1/0] dialer route ip 100.1.1.2 8810052

HP MSR Router Series User Manual

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