What does it mean when line protocol is down?

The line protocol being down indicates a clocking or framing problem. Probable reasons for this are encapsulation and clock rate mismatches. Ethernet0 is administratively down, line protocol is down: This output indicates that a local interface has been manually shut down using the shutdown command.

What is the line protocol state?

The current state field indicates the physical status of the interface and is not related to Layer 3 services and protocols. The Line protocol current state field indicates the link protocol status of the interface and is related to protocols.

What causes interface resets on Cisco switch?

Interface resets Number of times an interface has been completely reset. This can happen if packets queued for transmission were not sent within several seconds. On a serial line, this can be caused by a malfunctioning modem that is not supplying the transmit clock signal, or by a cable problem.

What does interface Down Down mean?

If the line shows up down then we believe that we have physical connectivity but no ability to transmit and receive on the interface. And if the interface shows up up then we have physical connectivity and the ability to transmit and receive on the interface. So down down indicates a problem with the connection.

What is the reason that the interface status is administratively down line protocol down?

What is the reason that the interface status is “administratively down, line protocol down”? There is no encapsulation type configured. There is a mismatch in encapsulation types. The interface is not receiving any keepalives.

What is meant by an interface being administratively down?

When an interface shows administratively down it means that if you look at the configuration you will see a line that says “shut”. Just go into config t and the interface and do a “no shut” this should bring the interface administratively up.

Is administratively down line protocol is down?

The CLI status output “Serial0/0/0 is administratively down, line protocol is down” means that either the router interface is configured with the “shutdown” interface configuration command or a duplicate IP address exists. If there are duplicate addresses, resolve the conflict by changing one of the IP addresses.

What does DOWN DOWN mean Cisco?

When the status of the show interfaces output lists down/down (shorthand to mean that both status values are “down”), tWhen the show interfaces status command should also list a matching state of “notconnected”.

What causes interface errors?

Note: There are several potential sources of interface errors, including interface discards when there is insufficient bandwidth to support the traffic volume, misconfigured duplex and speed settings, excessive buffering on interfaces, misconfigured EtherChannels, and faulty cables or hardware.

Why would a port be down?

Down : The port is not enabled, has no cables connected, or is experiencing a network error. The port’s speed and duplex (data transfer operation) setting. 10/100/1000Base-T Ports: Auto-MDIX (default): Senses speed and negotiates with the port at the other end of the link for port operation (MDI-X or MDI).