Enabling/disabling
LCAS
Capacity no VC-n
failures
One or more (but not
all) VC-ns failures
All VC-ns fail
LCAS disabled Working Capacity =
Provisioned Capacity
Working Capacity = 0 Working Capacity = 0
LCAS enabled Working Capacity =
Provisioned Capacity
Working Capacity is
reduced by amount of
failed VC-ns service
degraded.
Working Capacity = 0
With the introduction of LCAS for VC4-Xv an additional attribute “SDHWorkingCa-
pacity” is needed. The working capacity shows the value of the actual capacity
available, this allows the operator to see when service is degraded. The working
capacity will also be displayed for non-LCAS, showing a zero if the signal is degraded
on any VC-n. When LCAS is enabled Working Capacity show a zero only when the
signal is fully degraded. The next three figures depict the effect of LCAS.
Non-degraded service
Non LCAS causing degraded service
Traffic provisioning
Virtual concatenation
....................................................................................................................................................................................................................................
365-312-807R7.2
Issue 4, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
8-43
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