
Configuring Dial Services
6-4 114062 Rev. B
For Router A to dial Router C, you must configure the routers according to the
requirements listed in T
able 6-1.
Simplifying Unnumbered Configurations with Demand Circuit Groups
You can simplify configurations for large networks by using a demand circuit
group and dial backup service.
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 router
in the network. One demand circuit group supports many remote routers, thereby
reducing the configuration tasks for a large network.
Refer to Chapter 5 for a detailed description of demand circuit groups.
Sample Network Using Demand Circuit Groups
Figure
6-2 shows a sample network using demand circuit groups. Router 1 is a
regional router that supports hundreds of remote routers. Router 5 serves as a
recovery router for several branch offices if Router 1 fails.
Table 6-1. Configuration Requirements 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 Local Name/CHAP
Secret or PAP Local ID/ PAP Password
for the primary circuit
Configure the caller resolution table to include
Router A’s CHAP Name/CHAP Secret or PAP
ID/PAP Password
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