Avaya Configuring Dial Services Instrukcja Użytkownika Strona 70

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Configuring Dial Services
3-20
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 group 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.
When the router activates a line in the demand pool, the circuits in a demand
circuit group also become available. The router does not actually bring up the
circuits until it receives an incoming call.
A circuit group can belong to more than one demand pool. This enables the router
to use one configuration for circuits across the router’s slots. Note however, that
demand pools cannot cross slots.
Each demand circuit group has its own id. This number is distinct from the
demand pool ID that identifies the line pool.
Note that both individual demand circuits and demand circuit groups can use the
same demand pool.
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