Avaya Configuring Dial Services Bedienungsanleitung Seite 154

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Configuring Dial Services
6-12
308621-14.00 Rev 00
IP RIP Triggered Updates and Broadcast Timers
To prevent broadcast messages from keeping the demand circuit active, you can
configure the RIP broadcast timer and triggered updates.
The broadcast timer lets you configure how often the router sends routing updates
to the network. Unlike the broadcast timer, triggered updates are sent immediately
after the router detects a routing change in the network.
If you set the broadcast timer to a high value, for example, several hours, and you
enable triggered updates, you limit the frequency of broadcast traffic while
maintaining the accuracy of the routing tables. By limiting broadcast traffic, you
prevent the demand circuit from remaining active unnecessarily.
For more information about these RIP features, see Configuring IP, ARP, RARP,
RIP, and OSPF Services.
IPX RIP and SAP Broadcast Timers
To prevent broadcast messages from keeping the demand circuit active, you can
configure RIP and SAP broadcast timers for IPX transmission. RIP and SAP
broadcast timers enable you to control how often update transmissions occur. You
can even eliminate RIP and SAP broadcasts entirely. By controlling broadcast
traffic, you can prevent the demand circuit from remaining active unnecessarily.
For more information about broadcast timers, see Configuring IPX Services.
Traffic Filters
To prevent routing updates and protocol-specific messages from keeping the
circuit active, you can configure traffic filters that specify which packets are
permitted across an established dial-up line and which packets are prevented from
activating a dial-up line. Traffic filters enable the router to selectively relay or drop
a packet, frame, or datagram, based on standard protocol fields or user-defined
fields.
If you implement inbound filters, the router drops unwanted packets at the
interface where it receives data. By filtering incoming data, you can prevent
unwanted packets from going to the destination interface.
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