
Configuring Dial Services
5-4 114062 Rev. A
For Router A to dial Router C, you must configure the routers according to the
requirements in
Table 5-1.
Simplifying Unnumbered Configurations Using Demand Circuit
Groups
To set up a large network that includes a recovery router to back up a regional
router supporting many remote sites, you can simplify configuration by using
unnumbered interfaces as part of a demand circuit group.
A demand circuit group is a set of demand circuits that share the same
user-defined, unnumbered protocol configuration. An unnumbered protocol
configuration does not restrict the router to a specific destination address. Instead,
it enables the router to use any circuit in the group for an incoming call,
eliminating the need to configure a unique demand circuit for each remote node in
the network. One demand circuit group supports many remote routers, thereby
reducing the configuration tasks for a large network.
Demand Pools and Demand Circuit Groups
Like individual demand circuits, a demand circuit group is associated with an
existing demand pool. The number of circuits in the demand circuit group must be
less than or equal to the number of lines in the demand pool. If you change the
number of lines in a demand pool, you must increase or decrease the number of
demand circuits in the group accordingly.
Table 5-1. Configuration for Routers A and C
Router A Router C
Configure an unnumbered PPP primary
circuit.
Configure a demand pool with unnumbered
demand circuits.
Configure routing protocols for the
primary circuit.
Configure routing protocols on the demand
circuit to match Router A’s routing protocol
configuration for the primary circuit.
N/A Set Connection Mode parameter to No Dial.
Include CHAP Name/Secret or
PAP ID/Password for the primary circuit.
Configure the Caller Resolution Table to
include Router A’s CHAP Name/Secret or
PAP ID/Password.
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