
Configuring PPP Services
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Table 2-3. Comparing Multiline and Multilink
Feature Multiline Multilink
Advantages • Fault tolerance
• Bandwidth availability
• Fault tolerance
• Bandwidth availability
• Uses all lines in the bundle for
greatest speed and efficiency
Number of
physical lines/
circuit
• Up to 31 concurrent data
paths/group
• Data paths can either be
physical or logical lines
(multiple independent data
paths running over a single
physical interface)
Up to 30 lines/bundle, depending
on platform constraints, total
bundle speed, variance in
member links speeds, and traffic
characteristics. Please consult the
Nortel Networks Technical
Solutions Center in your area for
design guidelines.
Grouped/bundled
data paths
The data paths that together
make up a multiline circuit must
share the same speed, MTU,
and encapsulation method.
Lines in a bundle can have
different speeds.
Line types Can use leased lines. Can use leased as well as
switched lines.
Protocol
prioritization
• Automatically enabled
• User can specify protocol
prioritization and traffic filters
• Automatically enabled
• User can specify protocol
prioritization.
Used with these
data link types
• Nortel Networks standard
synchronous
• Frame relay direct mode
• PPP
PPP (only)
Media supported • Synchronous
•T1/E1
•MCE1/MCT1
• HSSI
• Synchronous
•T1/E1
•MCE1/MCT1
• ISDN B-channel drivers
• Raise-DTR/V.25bis modems
(continued)
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