The suppress-flapping lsp-flood command configures a period for the system to delay LSP flooding during route flapping.
The suppress-flapping lsp-flood disable command disables the delay function.
The undo suppress-flapping lsp-flood command restores the default configuration.
By default, if route flapping occurs, the device delays LSP flooding for 10s.
suppress-flapping lsp-flood timer delay-interval [ threshold threshold-value ]
suppress-flapping lsp-flood disable
undo suppress-flapping lsp-flood
undo suppress-flapping lsp-flood timer delay-interval [ threshold threshold-value ]
undo suppress-flapping lsp-flood disable
| Parameter | Description | Value |
|---|---|---|
| delay-interval | Specifies a period for the system to delay LSP flooding during route flapping. | The value is an integer ranging from 1 to 600, in seconds. |
| threshold threshold-value | Specifies a route flapping threshold. If a route flaps for the specified number of times, LSP flooding is delayed. | The value is an integer ranging from 3 to 100, in times. |
Usage Scenario
On an IS-IS network, if the device receives an LSP with a routing information change, the device floods LSPs to advertise the change. If routing information changes frequently and LSPs are flooded immediately, a lot of system resources will be consumed. To prevent this problem, run the suppress-flapping lsp-flood command to configure a period for the device to delay LSP flooding during route flapping.
Prerequisites
An IS-IS process has been created and the IS-IS view has been displayed using the isis command.
Configuration Impact
If the device delays LSP flooding too long, other devices on the network cannot detect the route information change in time, slowing down route convergence.