Foundation Summary

     

The "Foundation Summary" section of each chapter lists the most important facts from the chapter. Although this section does not list every fact from the chapter that will be on your exam, a well-prepared candidate should, at a minimum, know all the details in each "Foundation Summary" before going to take the exam.

Table 12-10 summarizes the commands covered in this chapter.

Table 12-10. Summary of Commands

Command	Function	Location of Command
Router# router isis	Starts the Integrated IS-IS process on the router	An EXEC command in configuration mode
Router(config-router)# net network-address	Defines the NET address of the router	A subrouter command, placed under router isis
Router(config-router)# is-type level-1	Defines whether the router is acting as an L1, L2, or L1-2 router	A subrouter command, placed under router isis
Router(config-router)# summary-address address mask	Enables you to summarize the networks manually	A subrouter command, placed under router isis
Router(config-if)# ip router isis	Turns on Integrated IS-IS routing for the interface	An interface command, placed under interface [ type number ]
Router(config-if)# clns router isis	Turns CLNS routing at the interface to allow the L2 LSPs to be unraveled so that the ATT bit can be seen	An interface command, placed under interface [ type number ]
Router(config-if)# frame-relay map ip destination address DLCI broadcast	Maps the Frame Relay address to the destination and defines the link as a broadcast link to be treated as a LAN	An interface command, placed under interface [ type number ]
Router# show clns neighbor detail	Displays information drawn from the neighbor table	An EXEC command
Router# show clns interface	Displays information about Integrated IS-IS Hello and timers seen on the interface	An EXEC command
Router# show isis database	Shows the link-state database	An EXEC command
Router# show isis spf-log	Show why and how often the SPF algorithm was calculated (listing the last 20 occurrences)	An EXEC command

Table 12-11 shows the debug command options discussed in this chapter.

Table 12-11. The debug Command Options for Integrated IS-IS

Command Option	Description
debug isis adjacencies-packets	Displays information on all adjacency - related activity. This includes the following: Hello packets (sent and received) Any changes in the state of an adjacency in Integrated IS-IS
debug isis spf-statistics	Displays statistical information about building routes between routers. Using the statistical information provided, one can determine how long it takes to place a Level 1 IS or Level 2 IS on the shortest path tree (SPT) using the IS-IS protocol.
debug isis update-packets	Displays SNPs (CSNPs and PSNPs) and LSPs that are detected by the router.