Avaya Configuring Dial Services Manual do Utilizador Página 38

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Configuring Dial Services
1-10
117353-B Rev. 00
For a dynamic UNI, use the default frame relay service record. This service
record holds all PVCs that the router learns dynamically.
Choose a network layer protocol that can retransmit data between the PVC
and the network if the data is lost.
Although the router makes a dial connection and starts sending data, the PVCs
do not always activate immediately. Consequently, you might lose data during
the first part of the transmission. Therefore, it is important to use protocols
that can account for this situation and ensure that any lost data can be sent
again. We strongly recommend using Internet Protocol (IP) or Internet
Protocol Exchange (IPX).
If the remote routers in your network are using IP, ensure that they also use the
Address Resolution Protocol (ARP) and not Inverse ARP. This enables the
local router to learn address information.
Activating Demand Circuits
The router activates a demand circuit when
The router has data to send across the circuit.
When the router has data to transmit, it automatically selects one of the
demand lines from the circuit’s associated demand pool. As long as data is
going across the line, the end-to-end connection remains active.
You enable the Force Dial parameter.
To activate a line immediately, you configure the Force Dial parameter to
force the router to initiate a connection, regardless of whether there is data
activity. To configure this parameter, see “Customizing PPP and Frame Relay
Demand Circuits” on page 10-6.
You specify a time of day to activate the circuit.
Using the Schedule option, you can schedule the circuit’s availability for a
specific day and time. The schedule parameters are part of the circuits
configuration (see “Scheduling When the Demand Circuit Is Available” on
page 10-9). The Schedule option also allows you to specify whether the router
uses the Inactivity Time parameter to dynamically deactivate the connection.
The router does not accept incoming calls or activate frame relay demand circuits
if there is an incoming call from the frame relay network. The router answers an
incoming call only over a PPP circuit.
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