Dell Force10 S4820T FTOS Command Reference Guide - Page 921
isis circuit-type, isis csnp-interval
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isis circuit-type e 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 8.3.19.0 Version 8.3.12.0 Introduced on S4820T Introduced on 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. isis csnp-interval e Configure the IS-IS complete sequence number PDU (CSNP) interval on an interface. Syntax isis csnp-interval seconds [level-1 | level-2] To return to the default values, enter the no isis csnp-interval [seconds] [level-1 | level-2] command. Intermediate System to Intermediate System (IS-IS) | 921