ospfv3 suppress-flapping peer hold-max-cost disable
Function
The ospfv3 suppress-flapping peer hold-max-cost disable command disables the Hold-max-cost mode.
The undo ospfv3 suppress-flapping peer hold-max-cost disable command enables the Hold-max-cost mode.
By default, the Hold-max-cost mode is enabled.
Format
ospfv3 suppress-flapping peer hold-max-cost disable [ instance instance-id ]
undo ospfv3 suppress-flapping peer hold-max-cost disable [ instance instance-id ]
Parameters
| Parameter | Description | Value |
|---|---|---|
| instance instance-id | Specifies the ID of the instance to which an interface belongs. | The value is an integer ranging from 0 to 255. |
Views
Ethernet interface view, Ethernet sub-interface view, Eth-Trunk interface view, Eth-Trunk sub-interface view, Tunnel interface view, Dialer interface view, VLANIF interface view
Usage Guidelines
Usage Scenario
Flapping suppression works in either Hold-down or Hold-max-cost mode.
- Hold-down mode: In the case of frequent flooding and topology changes during neighbor relationship establishment, interfaces prevent neighbor relationship reestablishment during Hold-down suppression, which minimizes LSDB synchronization attempts and packet exchanges.
- Hold-max-cost mode: If the traffic forwarding path changes frequently, interfaces use 65535 as the cost of the flapping link during Hold-max-cost suppression, which prevents traffic from passing through the flapping link.
Flapping suppression can also work first in Hold-down mode and then in Hold-max-cost mode.
By default, the Hold-max-cost mode takes effect. To configure the Hold-down mode and set duration for this mode, run the ospfv3 suppress-flapping peer hold-down interval command.
Precautions
The Hold-max-cost mode takes effect only unidirectionally. If a remote device does not support OSPFv3 neighbor relationship flapping suppression, bidirectional traffic between the local and remote devices may travel along different paths.