Operation Manual – Routing ProtocolH3C S9500 Series Routing Switches Chapter 5 Integrated IS-IS Configuration5-95.2.5 Setting Router TypeBased upon the position of the router, the levels can be divided into Level-1(intra-domain router), Level-2 (inter-domain router) and Level-1-2 (that is, intra-domainrouter as well as inter-domain router).Perform the following configuration in IS-IS view.Table 5-5 Set the router typeOperation CommandSet the router type is-level { level-1 | level-1-2 | level-2 }Restore the default router type undo is-levelBy default, the router type is level-1-2.5.2.6 Setting Interface Circuit LevelPerform the following configuration in Interface view.Table 5-6 Set the interface circuit levelOperation CommandSet the interface circuit level isis circuit-level [ level-1 | level-1-2 |level-2 ]Restore the default interface circuit level undo isis circuit-levelNote:Only when the router to which the interface belongs is of Level-1-2 type, is themodification to the interface circuit level meaningful. Otherwise, the type of the routerdetermines the level of adjacency relation.You can set the circuit level to limit what adjacency can be established for the interface.For example, Level-1 interface can only have Level-1 adjacency. Level-2 interface canonly have Level-2 adjacency. For the Level-1-2 router, you can configure someinterfaces to Level-2 to prevent transmitting Level-1 Hello packets to Level-2 backboneso as to save the bandwidth. However, Level-1 and Level-2 use the same kind of Hellopacket over the p2p link, and therefore such setting is unnecessary in this case.By default, the circuit-level on the interface is level-1-2.
