Configuring C-DCC

In the C-DCC approach, you can configure DCC parameters for a physical interface using one of the following methods:

• Directly configure DCC parameters on the physical interface. This is applicable only to one-to-one calls or one-to-many calls.

• Bind the interface to a dialer interface by assigning it to the dialer circular group associated with the dialer interface. The interface can inherit the DCC parameters configured on the dialer interface. This is applicable to many-to-one and many-to-many calls, in addition to one-to-many and one-to-one calls.

A dialer circular group associates a dialer interface with a group of physical interfaces. All physical interfaces in the group inherit the DCC configurations on the dialer interface. If the dialer interface is associated with multiple destinations, any physical interface in the group can call any of these destinations.

Depending on your network topology and dial needs, for example, to allow one or multiple interfaces to both place and receive calls, you can use any combinations of the following C-DCC configuration approaches:

• Configuring an interface to place calls to a remote end

• Configuring an interface to receive calls from a remote end

• Configuring an interface to place calls to multiple remote ends

• Configuring an interface to receive calls from multiple remote ends

• Configuring multiple interfaces to place calls to one or multiple remote ends

• Configuring multiple interfaces to receive calls from one or multiple remote ends

In the C-DCC implementation of DCC, the two dial parties can configure the PAP or CHAP authentication. Hewlett Packard Enterprise recommends that you configure authentication to ensure security of dialing IDs. For more information about configuring authentication, see "Configuring PPP and MP." When you do that, follow these guidelines:

• If one party has configured authentication, the other party must do that as well.

• At the sending side, if DCC is enabled on physical interfaces, directly configure PAP or CHAP authentication on the physical interfaces. If DCC is enabled on a dialer circular group, configure PAP or CHAP authentication on the dialer interface corresponding to the dialer circular group.

• At the receiving end, make the configuration on both physical and dialer interfaces, because after a physical interface receives a call, it negotiates PPP and authenticates the dialer prior to handing over the call to the upper layer DCC module.