
Configuring PPP Services
2-18 117360-A Rev. A
Differences between Multiline and Multilink
Both multiline and multilink use circuits consisting of one or more data paths
between two peer routers. Each has its special characteristics and advantages,
described in the following paragraphs and summarized in T
able 2-4.
Table 2-4. 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
Bay 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
priority and/or traffic filters
• Automatically enabled
• Not user configurable
• Automatically assigns highest
(interrupt) priority to LCP
packets and assigns all others
normal priority
Used with these
data link types
• Bay Networks standard
synchronous
• Frame relay direct mode
• PPP
PPP (only)
(continued)
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