# show isis spf-log

#### Syntax

show isis spf-log [ detail ] [ filter ]

#### Release Information

Command introduced before JunosE Release 7.1.0.

#### Description

Displays how often and why the router has run a full SPF calculation.

#### Options

- detail—Displays the time it takes to perform the route table update and the time it takes to leak the routes across ISIS levels
- filter—See Filtering show Commands

#### Mode

Privileged Exec, User Exec