There is a delay when a fixed switch interface alternates between Up and Down consecutively. Why

20

To prevent the interface from frequently reporting the status change event, run the carrier { up-hold-time | down-hold-time } interval command to set the delay in reporting the status change event.

By default, the delay in reporting a port Up event is 2000 milliseconds, and the delay in reporting a port Down event is 0 milliseconds.

Other related questions:
The state of an E1 interface is not Up when the interface interconnects with the peer device
For the problem that the state of an E1 interface of an AR router is not Up when the interface interconnects with other devices, see the troubleshooting guide. For details, access the URL in the right column.

What can I do if an interface on a PPPoE client frequently alternates between Up and Down states

The possible causes are as follows:

    -The IP address assigned to the interface by the PPPoE server is the same as that of another interface on the PPPoE client.

    Solution: Change the conflicting IP address on the PPPoE client or run the remote address command on the PPPoE server to change the IP address assigned to the interface.

  • -All IP addresses in the address pool on the PPPoE server have been allocated to PPPoE clients and no IP address is available for this interface.

    Solution: Run the network (IP address pool view) command in the IP address pool view on the PPPoE server to expand the IP address range of the IP address pool.


Why does the AR router interface change between Up and Down
When auto-negotiation is enabled on one end but disabled on the other end, set the same auto-negotiation mode on both ends. If auto-negotiation is enabled on one end of an electrical interface but disabled on the other end, packets may be discarded even when the interface is Up.

Why is the dialer interface still Up when the physical status of the dialer interface is Down
When the physical interface that is not connected to a cable is Down, the dialer interface displays Snoofing Up. This situation is normal. You can run the dialer number 1 autodial command so that the dialer interface changes as the physical interface.

If you have more questions, you can seek help from following ways:
To iKnow To Live Chat
Scroll to top