4000 Router Series Layer 2 - WAN Configuration Guide

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[RouterB-Dialer1] dialer timer autodial 10

Troubleshooting

Symptom 1: Failure to set up a dailup connection

DDR dialup connection cannot be set up because the modem does not dial when the router forwards

data.

Solution

Check that:

• The modem and phone cable connections are correct, and the modem initialization process is

correct.

• The dialup interface, if it is synchronous/asynchronous, is set to operate in asynchronous protocol

mode.

• DDR is enabled on the dialup interface.

• A dialer route or dialer number command is available for the packets.

Symptom 2: Ping failure

The remote end cannot be pinged after the modem is connected.

Solution

Check that:

• The same link layer encapsulation is used at the two ends, and correct PPP parameters are

configured for authentication. Use the debugging ppp all command to verify that.

• A correct IP address is assigned to the dialup interface (physical or dialer interface).

• DDR is enabled on the dialup interface.

• The correct dialer-group and dialer-group rule commands are configured and associated to make

sure that the packets can pass.

• Use the debugging dialer event and debugging dialer packet commands to locate the problem.