Avaya Configuring Dial Services Manual de usuario Pagina 151

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Dial-on-Demand Implementation Notes
308621-14.00 Rev 00
6-9
•IP
•IPX
XNS
Demand circuits require static routes if you disable the circuits routing update
protocols. To configure a static route, you need to specify in the protocols 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, see the appropriate protocol guide.
Dial-Optimized Routing
Dial-optimized routing lets you exchange IP RIP and IPX RIP/SAP routing
updates only when a connection is active. By limiting when the router sends
updates, dial-optimized routing reduces the number of connections as well as line
costs.
For each dial-on-demand circuit, you have the choice of enabling dial-optimized
routing. If you enable dial-optimized routing, the router establishes a demand
connection only for outbound data packets, or if it receives a request from the
protocol. The presence of IP RIP and IPX RIP/SAP packets alone will not trigger
a dial connection. If you disable dial-optimized routing, any packet can initiate
demand connections.
To configure dial-optimized routing, see “Enabling Dial-Optimized Routing” on
page 12-24.
Dial-optimized routing is supported for IP and IPX only. For all other protocols,
the router activates a demand connection for any type of routing packet, regardless
of whether you enable dial-optimized routing. To avoid this problem, you can
configure traffic filters to prevent specific types of packets from activating a
connection. See Configuring Traffic Filters and Protocol Prioritization for
information about configuring filters.
What Happens When You Enable Dial-Optimized Routing
With dial-optimized routing enabled, the router activates a demand connection
when there is data to send. The router then alerts IP and IPX that a connection is
active and that they can broadcast routing updates. IP and IPX can also send
triggered updates, if any occur while the connection is active.
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