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Title: SONET APS Question This
is an MPLS issue and should be not concerned with this forum.
To
answer your question, first of all, the K1/K2 is capsulated on the STS-1 Line
Overhead. So
both
the working and protection paths will receive K1/K2 in normal
condition. Secondary,
it is
up to the protection scheme and mode to decide whether to
revert back to the working
line
or not when the working line
becomes healthy again. If it is revertive and working
path state
changes from fail to ok, traffic will be
switched back to the working path after a
wait-to-restore
period. If it is non-revertive, of course it will
not. So if the working is healthy, traffic is on
the
protection path and and the protection path is
faulty, traffic will switch back to the
working
path
for sure.
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