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Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

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Changing the IS-Type

To 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 mode is-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 mode is-type {level-1 | level-1-2 | level-2}

Example of the show isis database Command to View Level 1-2 Link State Databases

To view which IS-type is configured, use the show isis protocol command in EXEC Privilege mode. The show config command in ROUTER ISIS mode displays only non-default information, so 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 view the Link State databases, use the show isis database command. 

Dell#show isis database
                                 IS-IS Level-1 Link State Database
                                 LSPID           LSP Seq Num  LSP Checksum LSP Holdtime ATT/P/OL
                                 B233.00-00     0x00000003    0x07BF       1088         0/0/0
                                 eljefe.00-00 * 0x00000009    0xF76A       1126         0/0/0
                                 eljefe.01-00 * 0x00000001    0x68DF       1122         0/0/0
                                 eljefe.02-00 * 0x00000001    0x2E7F       1113         0/0/0
                                 Dell.00-00     0x00000002    0xD1A7       1102         0/0/0
                                 IS-IS Level-2 Link State Database
                                 LSPID           LSP Seq Num  LSP Checksum LSP Holdtime ATT/P/OL
                                 B233.00-00     0x00000006    0xC38A       1124         0/0/0
                                 eljefe.00-00 * 0x0000000D    0x51C6       1129         0/0/0
                                 eljefe.01-00 * 0x00000001    0x68DF       1122         0/0/0
                                 eljefe.02-00 * 0x00000001    0x2E7F       1113         0/0/0
                                 Dell.00-00     0x00000004    0xCDA9       1107         0/0/0
                                 
                                 Dell#

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