Alcatel-Lucent 7450 Manual page 411

• If the MBB is not successful, the path retains it current value.
• The update-path MBB has the same priority as the manual re-signal MBB.
7450 ESS MPLS Guide
– MPLS writes the corresponding NHLFE in the data path if this path is the current backup path
for the primary.
– If the current path is the active LSP path, it will update the path, write the new NHLFE in the
data path that will cause traffic to switch to the new path.
MPLS and RSVP
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