You are troubleshooting a PPPoE connection that is supposed to maintain a connection with the ISP, even if no interesting traffic exists. The configuration of the dialer interface is shown below:

What command should you add to ensure the connection is maintained in the absence of interesting traffic?

A. dialer -group

B. dialer persistent

C. dialer list
D. dialer string

Explanation:
The dialer persistent command is used to specify that the connection stays up even in the absence of interesting traffic. Interesting traffic is user-defined traffic that triggers a call to the remote end. Were it present in the configuration, the section would appear as follows:

The dialer-group command is assigns the dialer interface to a dialer group. It is an optional setting, and does not appear in this configuration.

The dialer-list command is used to specify an access list that defines interesting traffic. It is an optional setting, and would NOT be a part of a configuration that does not maintain the connection based on interesting traffic. If you use dialer persistent, then you don’t need to use dialer-list. The dialer list defines interesting traffic, while dialer persist keep the connection up in the absence of interesting traffic.

The dialer string command is used to define the number to call to make the connection. It is present in the configuration in the scenario, and specifies the number 713 555 0199.

Objective:
Layer 2 Technologies
Sub-Objective:
Configure and verify PPP