Changing the IS-TypeTo change the IS-type, use the following commands.You can configure the system to act as a Level 1 router, a Level 1-2 router, or a Level 2 router.To change the IS-type for the router, use the following commands.• Configure IS-IS operating level for a router.ROUTER ISIS modeis-type {level-1 | level-1-2 | level-2-only}Default is level-1-2.• Change the IS-type for the IS-IS process.ROUTER ISIS modeis-type {level-1 | level-1-2 | level-2}Example of the show isis database Command to View Level 1-2 Link State DatabasesTo view which IS-type is configured, use the show isis protocol command in EXEC Privilege mode. The show config commandin ROUTER ISIS mode displays only non-default information. If you do not change the IS-type, the default value (level-1-2) is not displayed.The default is Level 1-2 router. When the IS-type is Level 1-2, the software maintains two Link State databases, one for each level. To viewthe Link State databases, use the show isis database command.Dell#show isis databaseIS-IS Level-1 Link State DatabaseLSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OLB233.00-00 0x00000003 0x07BF 1088 0/0/0eljefe.00-00 * 0x00000009 0xF76A 1126 0/0/0eljefe.01-00 * 0x00000001 0x68DF 1122 0/0/0eljefe.02-00 * 0x00000001 0x2E7F 1113 0/0/0Force10.00-00 0x00000002 0xD1A7 1102 0/0/0IS-IS Level-2 Link State DatabaseLSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OLB233.00-00 0x00000006 0xC38A 1124 0/0/0eljefe.00-00 * 0x0000000D 0x51C6 1129 0/0/0eljefe.01-00 * 0x00000001 0x68DF 1122 0/0/0eljefe.02-00 * 0x00000001 0x2E7F 1113 0/0/0Force10.00-00 0x00000004 0xCDA9 1107 0/0/0Dell#Controlling Routing UpdatesTo control the source of IS-IS route information, use the following command.• Disable a specific interface from sending or receiving IS-IS routing information.ROUTER ISIS modepassive-interface interface• For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the stack/slot/port/subport information.• For a 25-Gigabit Ethernet interface, enter the keyword twentyFiveGigE then the stack/slot/port/subport information.• For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the stack/slot/port[/subport] information.• For a 50-Gigabit Ethernet interface, enter the keyword fiftyGigE then the stack/slot/port/subport information.470 Intermediate System to Intermediate System
