
Configuring Line Services
10-10 115391-A Rev. A
Dial Backup
If a primary PPP, Frame Relay, or standard line fails and you have enabled dial
backup, the router automatically establishes a backup line and data transmission
continues.
PPP Multiline
Bay Networks PPP services include support for the multiline feature, which lets
you configure a single circuit that consists of one or more WAN data paths. A data
path is a logical point-to-point channel that is a permanent (leased) line. Multiline
provides both increased fault tolerance and greater bandwidth between two sites.
T
able 10-3 shows the features of multiline.
Table 10-3. Multiline Features
Feature Multiline
Advantages • Fault tolerance
• Bandwidth availability
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)
Grouped/bundled
data paths
The data paths that together make up a multiline circuit must share
the same speed, MTU, and encapsulation method
Line types Can use leased lines
Protocol
prioritization
• Automatically enabled
• User can specify protocol priority and/or traffic filters
Used with these
data link types
• Bay Networks standard synchronous
• Frame Relay direct mode
• PPP
Media supported • Synchronous
• T1/E1
• MCE1/MCT1
• HSSI
(continued)
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