Dell PowerConnect J-EX4200-24T Software Manual page 3173

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.
To configure the revert timer for LSPs configured with primary and secondary paths:
For all LSPs on the switch:
For a specific LSP on the switch:
Related Understanding MPLS and Path Protection on J-EX Series Switches on page 3063
Documentation
TIP: If you do not explicitly configure the revert timer, it is set by default to
60 seconds.
[edit protocols mpls]
user@switch# set revert-timer 120
[edit protocols mpls label-switched-path]
user@switch# set lsp_to_240 revert-timer 120
Chapter 122: Configuring MPLS
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