The isis suppress-flapping peer disable command disables IS-IS neighbor relationship flapping suppression from an interface.
The undo isis suppress-flapping peer disable command enables IS-IS neighbor relationship flapping suppression on an interface.
The isis suppress-flapping peer command configures detection parameters for IS-IS neighbor relationship flapping suppression.
The undo isis suppress-flapping peer command restores the default detection parameters.
The isis suppress-flapping peer hold-down command configures the Hold-down mode and sets duration for this mode.
The undo isis suppress-flapping peer hold-down command cancels the Hold-down mode.
The isis suppress-flapping peer hold-max-cost disable command disables the Hold-max-cost mode.
The undo isis suppress-flapping peer hold-max-cost disable command enables the Hold-max-cost mode.
By default, IS-IS neighbor relationship flapping suppression is enabled on all interfaces.
By default, the detection interval of IS-IS neighbor relationship flapping suppression is 60s, the suppression threshold is 10, and the interval for exiting from suppression is 120s.
By default, the Hold-down mode is disabled, and the Hold-max-cost mode is enabled.
By default, the Hold-max-cost mode is enabled.
isis suppress-flapping peer disable
isis suppress-flapping peer { detecting-interval detecting-interval | threshold threshold | resume-interval resume-interval } *
isis suppress-flapping peer hold-down interval
isis suppress-flapping peer hold-max-cost disable
undo isis suppress-flapping peer disable
undo isis suppress-flapping peer { detecting-interval detecting-interval | threshold threshold | resume-interval resume-interval } *
undo isis suppress-flapping peer hold-down [ interval ]
undo isis suppress-flapping peer hold-max-cost disable
| Parameter | Description | Value |
|---|---|---|
| detecting-interval detecting-interval |
Specifies the detection interval of IS-IS neighbor relationship flapping suppression. Each IS-IS interface on which IS-IS neighbor relationship flapping suppression is enabled starts a flapping counter. If the interval between two successive neighbor status changes from Full to a non-Full state is shorter than detecting-interval, a valid flapping_event is recorded, and the flapping_count increases by 1. |
The value is an integer ranging from 1 to 300, in seconds. The default value is 60s. |
| threshold threshold |
Specifies the threshold of IS-IS neighbor relationship flapping suppression. When the flapping_count reaches or exceeds threshold, flapping suppression takes effect. |
The value is an integer ranging from 1 to 1000. The default value is 10. |
| resume-interval resume-interval |
If the interval between two successive neighbor status changes from Full to a non-Full state is longer than resume-interval, the flapping_count is reset.
|
The value is an integer ranging from 2 to 1000, in seconds. The default value is 120s. |
| hold-down interval |
Specifies the duration of the Hold-down mode. |
The value is an integer ranging from 1 to 600, in seconds. |
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Usage Scenario
By default, IS-IS neighbor relationship flapping suppression is enabled on all interfaces in the same IS-IS process. To disable the function from one of the interfaces, run the isis suppress-flapping peer disable command.
When an interface enters the flapping suppression state, all neighbor relationships on the interface enter the state accordingly.Prerequisites
IS-IS neighbor relationship flapping suppression must have been enabled globally before you enable the function on an interface using the undo isis suppress-flapping peer disable command. By default, the function is enabled globally. If it is disabled, run the undo suppress-flapping peer disable command to enable it first.
IS-IS neighbor relationship flapping suppression must have been enabled globally before you configure detection parameters for it. By default, the function is enabled. If it is disabled, run the undo suppress-flapping peer disable command to enable it before you configure the detection parameters. IS-IS neighbor relationship flapping suppression must have been enabled globally before you configure the Hold-down mode and set duration for this mode. By default, the function is enabled. If it is disabled, run the undo suppress-flapping peer disable command to enable it before you configure the Hold-down mode and set duration for this mode.Precautions
Execution of the command may affect neighbor relationship stability. Therefore, exercise caution when using the command.
The Hold-max-cost mode takes effect only unidirectionally. If a remote device does not support IS-IS neighbor relationship flapping suppression, bidirectional traffic between the local and remote devices may travel along different paths.<HUAWEI> system-view [~HUAWEI] isis 1 [*HUAWEI-isis-1] quit [*HUAWEI] interface GigabitEthernet0/1/0 [*HUAWEI-GigabitEthernet0/1/0] isis enable 1 [*HUAWEI-GigabitEthernet0/1/0] isis suppress-flapping peer disable
<HUAWEI> system-view [~HUAWEI] isis 1 [*HUAWEI-isis-1] quit [*HUAWEI] interface GigabitEthernet0/1/0 [*HUAWEI-GigabitEthernet0/1/0] isis enable 1 [*HUAWEI-GigabitEthernet0/1/0] isis suppress-flapping peer detecting-interval 5 threshold 40 resume-interval 20
<HUAWEI> system-view [~HUAWEI] isis 1 [*HUAWEI-isis-1] quit [*HUAWEI] interface GigabitEthernet0/1/0 [*HUAWEI-GigabitEthernet0/1/0] isis enable 1 [*HUAWEI-GigabitEthernet0/1/0] isis suppress-flapping peer hold-max-cost disable
<HUAWEI> system-view [~HUAWEI] isis 1 [*HUAWEI-isis-1] quit [*HUAWEI] interface GigabitEthernet0/1/0 [*HUAWEI-GigabitEthernet0/1/0] isis enable 1 [*HUAWEI-GigabitEthernet0/1/0] isis suppress-flapping peer hold-down 200