3Com MSR 50 Series Configuration Manual page 160

160 C 6: DCC C
HAPTER ONFIGURATION
"Configuring multiple interfaces to place calls to one or multiple remote ends"
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on page 163
"Configuring multiple interfaces to receive calls from one or multiple remote
■
ends" on page 165
In the C-DCC implementation of DCC, the two dial parties can configure the
password authentication protocol (PAP) or the challenge-handshake
authentication protocol (CHAP) authentication. You are recommended to
configure authentication to ensure security of dialing IDs. When doing that, note
the following:
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
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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, you are recommended to make the configuration on both
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physical and dialer interfaces. This is because after a physical interface receives
a call, it negotiates PPP and authenticates the dialer prior to handing the call
over to the upper layer DCC module
Configuring an interface to place calls to a remote end
As shown in the following figure, an interface at the local end places calls to a
single remote end (the components in inverse color represent the routers irrelevant
to the networking):
Figure 15 Network diagram for an interface to place calls to a remote end
Local end
if0
(Single
interface)
In this scenario, for Interface0 (if0) to place DCC calls to a single remote interface
if1, you may configure a dial string with the dialer number or dialer route
command. As calls are to be placed from a single interface, you can configure
DCC by configuring a dialer circular group. In addition, you may configure PAP or
CHAP authentication.
After completing the basic DCC configurations, follow these steps to configure an
interface to place calls to a remote end:
if1
Remote end
(Single
interface)