3Com MSR 50 Series Configuration Manual page 167

If RS-DCC sets are used to configure RS-DCC parameters, you only need to
configure link layer encapsulation and dialer bundle numbers on physical
interfaces.
Before configuring RS-DCC, be aware of the following:
In RS-DCC, a RS-DCC set is unable to apply the attribute information in it, PPP
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authentication for example, to the physical interfaces in a dialer bundle. In
other words, the physical interfaces do not inherit the authentication attribute
in the RS-DCC set. Therefore, authentication information must be configured
on call receiving physical interfaces.
Authentication is mandatory in RS-DCC. You must configure authentication
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(dialer user and PPP authentication) on both dialer interfaces and their physical
interfaces. This is because RS-DCC needs to conduct PPP negotiation on the
physical interface and sends the agreed-upon remote username to DCC. Based
on this remote username, DCC decides which dialer interface address is used
and then informs PPP. PPP then uses the configuration of the dialer interface to
start IP control protocol (IPCP) negotiation.
Complete these tasks to configure RS-DCC for on-demand calling:
Task
"Enabling RS-DCC" on page 167
"Configuring a dial string for the dialer interface" on page
167
"Assigning physical interfaces to the dialer bundle" on page
168
"Configuring dial authentication for RS-DCC" on page 168
Enabling RS-DCC
Follow these steps to enable RS-DCC:
To do...
Enter system view
Create and enter dialer interface view
Set the remote username
Create a dialer bundle for the dialer
interface
Configuring a dial string for the dialer interface
In the RS-DCC approach to on-demand dial, the attributes of physical interfaces
vary by dial string. Therefore, DCC parameters should be configured on dialer
interfaces and dial strings can be configured only with the dialer number
command. Furthermore, for each dialer interface, you can configure only one dial
string.
Follow these steps to configure a dial string for the dialer interface:
To do...
Enter system view
DCC Configuration
Remarks
Required
Required
Required
Required
Use the command...
system-view
interface dialer number
dialer user username
dialer bundle number
Use the command...
system-view
167
Remarks
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Required
Required
Remarks
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