Netgear RH348 User Manual Page 68

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Reference Guide for the Model RT328 and Model RH348 ISDN Routers
5-6 Remote Node Configuration
Bandwidth on Demand
The Bandwidth on Demand (BOD) feature allows you to bundle both B channels in one logical
connection. The second channel is added and subtracted dynamically according to traffic demand.
The router uses the Bandwidth Allocation Control Protocol (BACP) and the Multilink Protocol
(MP) in implementing 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 is shown in
Table 5-3.
When the Bandwidth on Demand feature is enabled, a second channel is 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 is 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 the router to add or
subtract bandwidth. The range is 30 to 64 Kbps. The parameters are separated by a hyphen ( - ).
For example, 30-60 means the add threshold is 60 Kbps and the subtract threshold is 30 Kbps. The
router performs 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,
traffic in either direction is calculated to determine if a link should be added or dropped. Transmit
uses only outgoing traffic to make this determination, and Receive uses only incoming traffic to
make this determination.
Table 5-3. Relationship Between BTR and MTR
BTR & MTR Setting
Number of Channels
Used to Initiate Call
Max Number of
Channels Used
Bandwidth on Demand
BTR = 64, MTR = 64 1 1 Off
BTR = 64, MTR = 128 1 2 On
BTR = 128, MTR = 128 2 2 Off
Nodeconf.fm Page 6 Tuesday, October 10, 2000 3:19 PM
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