| area-password password | Configures IS-IS area (level 1) authentication. |
| clns routing | Enables the routing of CLNS PDUs. |
| debug isis adj-packets | Displays IS-IS Hello PDU activity. |
| debug isis spf-events | Displays details of events triggering an IS-IS SPF calculation. |
| debug isis snp-packets | Displays information about SNPs sent and received by the router. |
| debug isis spf-statistics | Displays statistical information about IS-IS SPF calculations. |
| debug isis spf-triggers | Displays events that trigger IS-IS SPF calculations. |
| debug isis update-packets | Displays information about LSPs, CSNPs, and PSNPs sent and received by the router. |
| default-information originate [ route-map map- name ] | Generates a default IP route into an IS-IS domain. |
| domain-password password | Configures IS-IS domain (level 2) authentication. |
| ignore-lsp-errors | Configures an IS-IS router to ignore errored LSPs rather than triggering a purge of the LSPs. |
| ip router isis [ tag ] | Enables IS-IS routing on an interface. |
| isis csnp-interval seconds { level-1 level-2 } | Specifies the interval in which an IS-IS Designated Router sends CSNPs. |
| isis hello-interval seconds { level-1 level-2 } | Specifies the interval between transmissions of IS-IS Hello PDUs. |
| isis hello- multiplier multiplier { level-1 level-2 } | Specifies the number of IS-SI Hello PDUs a neighbor must miss before declaring its adjacency to the originating router down. |
| isis metric default-metric { level-1 level-2 } | Specifies an interface's IS-IS default metric. |
| isis password password { level-1 level-2 } | Configures authentication between two IS-IS neighbors. |
| isis priority value { level-1 level-2 } | Specifies the priority of an interface to be used for DR election. |
| isis retransmit-interval seconds | Specifies the time a router will wait for an acknowledgment after sending an LSP on a point-to-point link before retransmitting the LSP. |
| is-type { level-1 level-1-2 level-2-only } | Configures the router as an L1, L1/L2, or L2 IS-IS router. |
| net network-entity-title | Configures an IS-IS router's NET. |
| router isis [ tag ] | Enables an IS-IS routing process. |
| set-overload-bit | Manually sets the Overload bit in a router's LSP to one. |
| show clns is-neighbor [ type number ][ detail ] | Displays the IS-IS neighbor table. |
| show isis database [ level-1 ][ level-2 ][ l1 ][ l2 ][ detail ][ lspid ] | Displays an IS-IS link state database. |
| show isis spf-log | Displays how often and why the router has run a full SPF calculation. |
| summary-address address-mask { level-1 level-1-2 level-2 } | Configures IP address summarization. |
| which-route { nsap-address clns-name } | Displays the routing table in which the specified CLNS destination is found and displays details of the associated IP addresses and area addresses. |