Alcatel-Lucent 7450 Manual page 40

Label Switching Routers
The following parameters are defined:
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When a sample interval ends it is counted as an overflow if:
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If the bandwidth adjustment is successful then the adjust-interval, maximum average data rate and
overflow count are all reset. If the bandwidth adjustment fails then the overflow count is reset but
the adjust-interval and maximum average data rate continue with current values. It is possible that
the overflow count will once again reach the configured limit before the end of adjust-interval is
reached and this will once again trigger an immediate auto-bandwidth adjustment attempt.
The overflow configuration command fails if the max-bandwidth of the LSP has not been defined.
The threshold limit can be changed on an operational auto-bandwidth LSP at any time and the
change should take effect at the end of the current sample interval (for example, if the user
decreases the overflow limit to a value lower than the current overflow count then auto-bandwidth
adjustment will take place as soon as the sample interval ends). The threshold values can also be
changed at any time (for example, %_threshold and min_threshold) but the new values will not
take effect until the end of the current sample interval.
Manually-Triggered Auto-Bandwidth Adjustment
Manually-triggered auto-bandwidth adjustment feature is configured with the
tools>perform>router>mpls adjust-autobandwidth [lsp lsp-name [force [bandwidth mbps]]]
command to attempt immediate auto-bandwidth adjustment for either one specific LSP or all
active LSPs. If the LSP is not specified then the system assumes the command applies to all LSPs.
Page 40
current_bw — The currently reserved bandwidth of the LSP.
sampled_bw — The average data rate of the sample interval that just ended.
measured_bw — The maximum average data rate in the current adjust interval.
signaled_bw — The bandwidth that is provided to the CSPF algorithm and signaled in the
SENDER_TSPEC and FLOWSPEC objects when an auto-bandwidth adjustment is
attempted.
max — The configured max-bandwidth of the LSP.
%_threshold — The minimum difference between sampled_bw and current_bw,
expressed as a percentage of the current_bw, for counting an overflow event.
min_threshold — The minimum difference between sampled_bw and current_bw,
expressed as an absolute bandwidth relative to current_bw, for counting an overflow
event. This is an optional parameter; if not defined the value is 0.
The sampled bandwidth exceeds the current bandwidth by more than the percentage
threshold and by more than the absolute bandwidth threshold (if defined).
When the number of overflow samples reaches a configured limit, an immediate attempt is
made to adjust the bandwidth to the measured bandwidth (subject to the min and max
constraints).
7450 ESS MPLS Guide