User Guide

Bandwidth-on-Demand (Multilink Protocol) Configuration
Local Management User’s Guide 2-17
The fields for the BoD feature are described as follows:
Bandwidth-on-Demand (BoD) option — Specifies whether or not MP support is desired. To
successfully negotiate MP, both devices must support MP. The default setting is DISABLE.
Line Utilization (LU) Threshold (LUT)% — Specifies a line utilization threshold (%) value to
compare against the linear weighted percentage by which to determine when more or less
bandwidth is to be added or removed. The default setting is 50.
History time in seconds to compute LU Avg. (LUA) — Specifies a time value in seconds over
which the line utilization percentage is averaged by the linear weighted percentage algorithm. The
default setting is 5.
# of LUA computation(s) > LUT for when to add BW — Specifies the number of samples for
which the condition for adding more bandwidth must persist before additional bandwidth is added.
This parameter is used to filter out traffic bursts. The value should be chosen such that the time it
takes to add more bandwidth is less than the time the traffic will exceed the “line threshold”. This
will avoid the additional cost of adding unnecessary bandwidth. The default setting is 1.
# of LUA computation(s) < LUT for when to remove BW — Specifies the number of seconds
that the output has fallen below the line threshold before possible previously added additional
bandwidth is removed. The default value is 5.
Maximum # of calls allowed including the 1st call — Specifies the maximum number of
channels an MP call is allowed. The value accounts for the channel used to establish the original/
first link. The default setting is 1.
When modifying the “Maximum # of calls allowed” parameter, which accounts for the first call, a
check is first made against the maximum profiles setting for that interface. Although the maximum
possible value allowed is shown to be 20, the true maximum is the current maximum profiles
setting for that interface (which cannot exceed 20).
# of calls to increase by — Specifies the incremental number of channels by which to increase
additional bandwidth. Specifically, channels can be added in multiples. The default setting is 1.
# of calls to decrease by — Specifies the decremental number of channels by which to remove
bandwidth. Specifically, channels can be removed in multiples. The default setting is 1.
Avg packet size used to determine when to fragment — Specifies the average packet size by
which to determine when it is best to split a packet. This minimizes the amount of buffering
necessary at the remote device to maintain packet sequentiality. The default setting is 260.