
Configuring Line Services
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• PPP Multilink
• Bandwidth-on-Demand (BOD)
Benefits of a Multiline Configuration
Using a multiline configuration rather than a single path provides the following
advantages
• Greater bandwidth between two sites
Bandwidth is the rate at which traffic travels on the circuit. A multiline circuit
has greater bandwidth because traffic can travel via more than one data path.
• Greater degree of fault tolerance
In a multiline configuration, multiple data paths exist for a single circuit.
Consequently, if one data path becomes disabled, traffic can travel over
another data path.
The example in the next section illustrates the benefits of using multiline services.
Multiline Example
Suppose that your network uses Bay Networks routers to connect two sites, one in
New York City and one in Los Angeles
(Figure 7-1). A high volume of important
data travels between the two sites via three synchronous lines.
Grouping the three synchronous lines into one multiline circuit would
• Reduce congestion by distributing the volume of traffic more evenly among
the three lines.
• Decrease the chance of data loss if a connection fails.
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