# mpls reoptimize timers frequency

#### Syntax

mpls [ traffic-eng ] reoptimize timers frequency seconds

no mpls [ traffic-eng ] reoptimize timers frequency

#### Release Information

Command introduced before JunosE Release 7.1.0.

#### Description

Specifies the frequency at which existing LSPS are checked for better paths. RSVP-TE adds a random number in the range 0–60 seconds to the specified value to prevent all LSPs from being reoptimized simultaneously. The no version restores the default value, 3600 seconds.

| Note: Low timer values lead to frequent reoptimization of LSPs, which is undesirable for the following reasons: Frequent changes to the LSPs increases packet loss. Frequent reoptimization increases the load on the router, especially when the router acts as the LSP head end. The load is particularly noticeable in a scaled network, resulting in high CPU utilization on the router.

#### Options

- traffic-eng—Specifies optional keyword for compatibility with non–E Series implementations
- seconds—Number of seconds in the range 0–604800; a value of zero means that no reoptimization is performed

#### Mode

Global Configuration