If BFD detection is not configured, after the primary LSP fails, the TE Hot-standby switchover is triggered by the protocol convergence. To improve the switching speed, you can enable the CSPF fast switching function by using the mpls te tedb fast-notice command.
Example
# Enable CSPF fast switching.
<HUAWEI> system-view
[~HUAWEI] mpls lsr-id 10.1.1.1
[*HUAWEI] mpls
[*HUAWEI-mpls] mpls te
[*HUAWEI-mpls] mpls te cspf
[*HUAWEI-mpls] mpls te tedb fast-notice