Dell S6000 FTOS 9.0(2.0) Command Line Reference Guide for the System - Page 533

Version 8.3.11.1 Version 8.3.7.0 Introduced on Z9000 Introduced on the S4810. Usage You must configure a network entity title (the net command) to specify the area address and the router Information system ID. You must enable routing on one or more interfaces to establish adjacencies and establish dynamic routing. Only one IS-IS routing process can be configured to perform Level 2 routing. A level-1-2 designation performs Level 1 and Level 2 routing at the same time. Related Commands net is-type Configure an IS-IS network entity title (NET) for a routing process. Assign a type for a given area. isis circuit-type S6000 Configure the adjacency type on interfaces. Syntax isis circuit-type {level-1 | level-1-2 | level-2-only} To return to the default values, enter no isis circuit-type. Parameters level-1 level-1-2 level-2-only 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. 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, then a Level 2 adjacency is established. This is the default. 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 Version 9.0.2.0 Version 8.3.7.0 Introduced on the S6000. Introduced on the S4810. Usage Information Because the default establishes Level 1 and Level 2 adjacencies, you do not need to configure this command. Routers in an IS-IS system should be configured as a Level 1-only, Level 1-2, or Level 2-only system. Only configure interfaces as Level 1 or Level 2 on routers that are between areas (for example, a Level 1-2 router) to prevent the software from sending unused hello packets and wasting bandwidth. | 533