
Bandwidth-on-Demand Implementation Notes
114062 Rev. B 7-5
How BAP Works
Figure 7-2 shows BAP negotiation between two routers.
Figure 7-2. BAP Negotiation between Two Routers
In this example, two Bay Networks routers are connected. Router A has only one
phone number in its outgoing phone list for the destination, Router B. Router A
calls Router B. While they are communicating, Router A, the monitor router,
determines that it needs more bandwidth based on the user-defined congestion
thresholds. BAP negotiation then begins as follows:
1. Router A sends a call request asking for more bandwidth.
2. Router B, the non-monitor router, checks the router slots to find an available
line. It uses the Preferred and Reserved Bandwidth Slot parameters to
determine which slots to check first. You can set these parameters for a
non-monitor router if the Bandwidth Mode parameter is set to Dynamic
Monitor.
3. When it finds an available line, Router B sends a call response that includes
the local phone number of the available line.
4. Router A calls the new phone number. Router B then activates the additional
line.
5. If the lines become congested again, Router A repeats the process.
Router A
Router B
DS0034A
Call request
Router dials
5085551234
Call response
which includes
5085551234
5085551234
5085554365
5085551298
5085559854
Monitor
Non-monitor
Local Phone List
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