# router isis

#### Syntax

[ no ] router isis [ tag ]

#### Release Information

Command introduced before JunosE Release 7.1.0.

#### Description

Enables the IS-IS routing protocol and specifies an IS-IS process for IP. The no version disables IS-IS routing.

#### Options

- tag—Meaningful name for a routing process; name must be unique among all IP router processes for a given router; if not specified, a null tag is assumed, and the process is referenced with a null tag

#### Mode

Global Configuration