3Com 3C13636 Configuration Manual page 1417

3Com Router 3000 Ethernet Family
Configuration Guide
Each dialer interface can use only one dialer bundle, which contains multiple
physical interfaces of different priorities. However, each physical interface can be
used by different dialer bundles. For an ISDN BRI or PRI interface, the number of
B channels used can be configured by using the dialer bundle command.
All the calls aimed to the same destination segment use the same RS-attribute set.
Due to the differences between the configurations of logical and physical interface,
RS-DCC are applicable for more network topologies and DCC dialing requirements,
especially for the situation in which multiple interface groups originate calls to multiple
remote interfaces.
Call
Remote end A
Call
Remote end B
Call
Remote end C
Figure 1-9 Multiple interfaces placing calls to multiple remote ends in the RS-DCC
implementation
As shown in the above figure, different dialer interfaces are used for establishing calls
to different remote ends. (That is, one dialer interface only corresponds to one remote
end.) A physical interface can generate calls to different destinations by joining the
interface into bundles, each of which corresponds to a certain dialer interface.
When you configure RS-DCC based on RS-attribute set, a physical interface only
needs to be configured with the link layer protocol and the number of the dialer bundle
to which the physical interface belongs.
Note:
When you configure RS-DCC based on RS-attribute set, a RS-attribute set is unable to
apply its attributes to the physical interfaces in a dialer bundle. (For example, it is
unable to apply PPP authentication to the physical interfaces.) In other words, the
physical interfaces do not inherit the authentication attribute of the RS-attribute set.
Therefore, authentication of the related information must be configured on the physical
interfaces at the receiving end.
Physical interface
groups
Local end
(multiple interfaces)
Dialer0
Dialer1
Router
Dialer2
3Com Corporation
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Chapter 1 DCC Configuration
if1
Remote end A
Single/Multiple interface(s)
Router
if2
Remote end B
Single/Multiple interface(s)
Router
if3
Remote end C
Single/Multiple interface(s)
Router