The lsp-fragments-extend command enables LSP fragment extension on the IS-IS device for a particular mode and level. To enable the router to generate extended LSP fragments, at least one virtual system ID must be configured.
The undo lsp-fragments-extend command disables this feature.
By default, LSP fragment extension is not enabled on an IS-IS device.
lsp-fragments-extend [ [ level-1 | level-2 | level-1-2 ] | [ mode-1 | mode-2 ] ] *
undo lsp-fragments-extend [ mode-1 | mode-2 ] [ level-1 | level-2 | level-1-2 ]
| Parameter | Description | Value |
|---|---|---|
| level-1 | Enables LSP fragment extension on Level-1 routers. | - |
| level-2 | Enables LSP fragment extension on Level-2 routers. | - |
| level-1-2 | Enables LSP fragment extension on Level-1-2 routers. | - |
| mode-1 | Indicates a fragment extension mode. In this mode, the router with an earlier version that does not support this feature is compatible. | - |
| mode-2 | Indicates a fragment extension mode. In this mode, all routers must support this feature. NOTE:
By default, mode-1 and level-1-2 are used. |
- |
You can enable LSP fragment extension only after you restart the IS-IS process by using the reset isis all command.