Users Guide

You can configure only one IS-IS routing process to perform Level 2 routing. A
level-1-2 designation performs Level 1 and Level 2 routing at the same time.
Related
Commands
• net — configure an IS-IS network entity title (NET) for the routing process.
• is-type — assign a type for a given area.
isis circuit-type
Configure the adjacency type on interfaces.
Syntax
isis circuit-type {level-1 | level-1-2 | level-2-only}
To return to the default values, use the no isis circuit-type command.
Parameters
level-1 You can form a Level 1 adjacency if there is at least one
common area address between this system and neighbors. You
cannot form Level 2 adjacencies on this interface.
level-1-2 You can form a Level 1 and Level 2 adjacencies when the
neighbor is also configured as Level-1-2 and there is at least one
common area, if not, a Level 2 adjacency is established. This
setting is the default.
level-2-only You can form a Level 2 adjacencies when other Level 2 or Level
1-2 routers and their interfaces are configured for Level 1-2 or
Level 2. Level 1 adjacencies cannot be established on this
interface.
Defaults level-1-2
Command Modes INTERFACE
Command History
This guide is platform-specific. For command information about other platforms, see
the relevant Dell Networking OS Command Line Reference Guide.
Version Description
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.5(0.1) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
Intermediate System to Intermediate System (IS-IS) 1133