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and subtracted dynamically according to traffic demand. The router
uses the Bandwidth Allocation Control Protocol (BACP) and the
Multilink Protocol (MP) to implement bandwidth on demand.
The configuration of bandwidth on demand focuses on the Base
Transmission Rate (BTR) and the Maximum Transmission Rate
(MTR). The relationship between BTR and MTR are shown below:
BTR & MTR Setting
BTR = 64, MTR = 64
BTR = 64, MTR = 128
BTR = 128, MTR = 128
When bandwidth on demand is enabled, a second channel will be
brought up if traffic on the initial channel is higher than the high
Target Utility number for longer than the specified Add Persist
value. Similarly, the second channel will be dropped if the traffic
level falls below the low Target Utility number for longer than the
Subtract Persist value.
The Target Utility specifies the line utilization range at which you
want your DI-300 or DI-300M to add or subtract bandwidth. The
range is 30 to 64 kbps (kilobits per second). The parameters are
separated by a -. For example, 30-60 means the add threshold is 60
kbps and subtract threshold is 30 kbps. The router will perform
bandwidth on demand only if it initiates the call. Addition and
subtraction are based on the value set in the BOD Calculation field.
If this field is set to Transmit or Receive, then traffic in either
direction will be calculated to determine if a link should be added or
dropped. Transmit will only use outgoing traffic to make this
determination, and Receive will only use incoming traffic to make
this determination.
Remote Node Configuration
No. of channel(s)
Max No. of
used to initiate call
channel(s) used
1
1
1
2
2
2
Bandwidth on
demand
Off
On
Off
55
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