Juniper JUNOS OS 10.3 - SOFTWARE Manual page 3491

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For LSPs configured with both primary and secondary paths, you can optionally configure
a revert timer. If the primary path goes down and traffic is switched to the secondary
path, the revert timer specifies the amount of time (in seconds) that the LSP must wait
before it can revert traffic back to the primary path. If the primary path experiences any
connectivity problems or stability problems during this time, the timer is restarted.
TIP: If you do not explicitly configure the revert timer, it is set by default to
60 seconds.
To configure the revert timer for LSPs configured with primary and secondary paths:
For all LSPs on the switch:
[edit protocols mpls]
user@switch# set revert-timer 120
For a specific LSP on the switch:
[edit protocols mpls label-switched-path]
user@switch# set lsp_to_240 revert-timer 120
Understanding MPLS and Path Protection on EX Series Switches on page 3357
Chapter 123: Configuring MPLS
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