Ping failure

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

To resolve the problem:

1. Use the debugging ppp all command to verify that the two ends use the same link layer encapsulation and have correct PPP parameters configured for authentication.

2. Verify that a correct IP address is assigned to the dialup interface.

3. Verify that DDR is enabled on the dialup interface.

4. Verify that the correct dialer-group and dialer-group rule commands are configured and associated to ensure that the packets can pass.

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