Avaya Configuring Dial Services Uživatelský manuál Strana 79

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Dial-on-Demand Implementation Notes
114062 Rev. A 4-3
Static Routes
You need to configure the demand-circuit protocols so that they do not send
broadcast messages out to the network. Once you disable broadcast messages, the
router must determine the destination address using another means: static routes.
A static route specifies the transmission path that data must follow to another
network. This path is based on the destination address of the data. Protocols that
can use static routes include
AURP
DECnet
DLSw
•IP
IPX
XNS
Demand circuits require static routes if you disable the circuit’s routing update
protocols. To configure a static route, you need to specify in the protocol’s routing
table the address of the network to which you will be sending data. The address
must be unique to that circuit. For more information about static routes for each of
these protocols, refer to the appropriate protocol manual.
IP RIP Triggered Updates and Broadcast Timers
To prevent broadcast messages from keeping the demand circuit up, you can
configure the Routing Information Protocol (RIP) broadcast timer together with
triggered updates.
The broadcast timer lets you configure how often the router sends routing updates
to the network. Using this timer, you can control the frequency of broadcast
transmissions. Unlike the broadcast timer, triggered updates are those sent
immediately after the router detects any routing change in the network.
If you set the broadcast timer to a large value, for example, several hours, and you
enable triggered updates, you limit the frequency of broadcast transmissions while
maintaining the accuracy of the routing tables. By limiting broadcast traffic, the
demand circuit does not remain active unnecessarily.
For more information about these RIP features, refer to Configuring IP Services.
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