Alcatel-Lucent 7450 Manual page 39

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At the end of every adjust interval the system decides if an auto-bandwidth adjustment should be
attempted. The heuristics are as follows:
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Changes to min-bandwidth, max-bandwidth and any of the threshold values (up, up%, down,
down%) are permitted at any time on an operational LSP but the changes have no effect until the
next auto-bandwidth trigger (for example, adjust interval expiry).
If the measured bandwidth exceeds the current bandwidth by more than the percentage threshold
and also by more than the absolute threshold then the bandwidth is re-signaled to the measured
bandwidth (subject to min and max constraints).
The adjust-interval and maximum average data rate are reset whether the adjustment succeeds or
fails. If the bandwidth adjustment fails (for example, CSPF cannot find a path) then the existing
LSP is maintained with its existing bandwidth reservation. The system does not retry the
bandwidth adjustment (for example, per the configuration of the LSP retry-timer and retry-limit).
Overflow-Triggered Auto-Bandwidth Adjustment
For cases where the measured bandwidth of an LSP has increased significantly since the start of
the current adjust interval it may be desirable for the system to preemptively adjust the bandwidth
of the LSP and not wait until the end of the adjust interval.
7450 ESS MPLS Guide
max — The configured max-bandwidth of the LSP.
up% — The minimum difference between measured_bw and current_bw, expressed as a
percentage of current_bw, for increasing the bandwidth of the LSP.
up — The minimum difference between measured_bw and current_bw, expressed as an
absolute bandwidth relative to current_bw, for increasing the bandwidth of the LSP. This
is an optional parameter; if not defined the value is 0.
down% — The minimum difference between current_bw and measured_bw, expressed as
a percentage of current_bw, for decreasing the bandwidth of the LSP.
down — The minimum difference between current_bw and measured_bw, expressed as
an absolute bandwidth relative to current_bw, for decreasing the bandwidth of the LSP.
This is an optional parameter; if not defined the value is 0.
If the measured bandwidth exceeds the current bandwidth by more than the percentage
threshold and also by more than the absolute threshold then the bandwidth is re-signaled
to the measured bandwidth (subject to min and max constraints).
If the measured bandwidth is less than the current bandwidth by more than the percentage
threshold and also by more than the absolute threshold then the bandwidth is re-signaled
to the measured bandwidth (subject to min and max constraints).
If the current bandwidth is greater than the max bandwidth then the LSP bandwidth is re-
signaled to max bandwidth, even if the thresholds have not been triggered.
If the current bandwidth is greater than the min bandwidth then the LSP bandwidth is re-
signaled to min bandwidth, even if the thresholds have not been triggered.
MPLS and RSVP
Page 39