Alcatel-Lucent 7450 Manual page 37

All LSPs configured for accounting, including any configured for auto-bandwidth based on traffic
measurements, must reference the same accounting policy. An example configuration of such an
accounting-policy is shown below: in the CLI example below.
config log
accounting-policy 99
collection-interval 5
exit
exit
Note that the record combined-mpls-lsp-egress command in the accounting policy has the effect
of recording both egress packet and byte counts and bandwidth measurements based on the byte
counts if auto-bandwidth is enabled on the LSP.
When egress statistics are enabled the CPM collects stats from of all IOMs involved in forwarding
traffic belonging to the LSP (whether the traffic is currently leaving the ingress LER via the
primary LSP path, a secondary LSP path, an FRR detour path or an FRR bypass path). The egress
statistics have counts for the number of packets and bytes forwarded per LSP on a per-forwarding
class, per-priority (in-profile vs. out-of-profile) basis. When auto-bandwidth is configured for an
LSP the ingress LER calculates a traffic rate for the LSP as follows:
Average data rate of LSP[x] during interval[i] = F(x, i)—F(x, i-1)/sample interval
F(x, i) — The total number of bytes belonging to LSP[x], regardless of forwarding-class or
priority, at time[i]
sample interval = time[i] — time [i-1], time[i+1] — time[i], etc.
The sample interval is the product of sample-multiplier and the collection-interval specified in the
auto-bandwidth accounting policy. A default sample-multiplier for all LSPs may be configured
using the config>router>mpls>auto-bandwidth-defaults command but this value can be
overridden on a per-LSP basis at the config>router>mpls>lsp>auto-bandwidth context. The
default value of sample-multiplier (the value that would result from the no auto-bandwidth-
defaults command) is 1, which means the default sample interval is 300 seconds.
Over a longer period of time called the adjust interval the router keeps track of the maximum
average data rate recorded during any constituent sample interval. The adjust interval is the
product of adjust-multiplier and the collection-interval specified in the auto-bandwidth
accounting-policy. A default adjust-multiplier for all LSPs may be configured using the
config>router>mpls>auto-bandwidth-multiplier command but this value can be overridden on
a per-LSP basis at the config>router>mpls>lsp>auto-bandwidth context. The default value of
adjust-multiplier (the value that would result from the no auto-bandwidth-mulitplier command) is
288, which means the default adjust interval is 86400 seconds or 24 hours. The system enforces
the restriction that adjust-multiplier is equal to or greater than sample-multiplier. It is
recommended that the adjust-multiplier be an integer multiple of the sample-multiplier.
7450 ESS MPLS Guide
record combined-mpls-lsp-egress
MPLS and RSVP
Page 37