
Dial Services Overview
114062 Rev. A 1-21
Example Bandwidth-on-Demand Application
In Figure 1-10, the leased line is congested due to bridge/routing protocol traffic.
The BLN in Rome, designated as the congestion monitor, has determined the line
is congested based on the bandwidth-on-demand monitor parameter values.
Consequently, the router brings up an ISDN B channel as a secondary line.
Figure 1-10. Sample Bandwidth-on-Demand Network
The congestion monitor brings down the secondary line once the level of
congestion falls below the configured percentages.
In addition to serving as a secondary line for the leased line to Avignon, the B
channel can also act as a backup line for the leased line from Rome to Florence
and as a demand line from Rome to Interlaken.
AN
Slot 3
Octal Sync
Slot 2
Dual Sync
Dual Ethernet
TA
Rome
Backbone Link Node
Avignon
Access Node
Dial-up Line to Interlaken
Secondary Dial-up Line
(ISDN B Channe)l
Leased Line (9.6 Kb/s)
ISDN
DS0001A
64 Kb/s Leased Line to Florence
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