What does up down interface mean?
FastEthernet0 is up, line protocol is down: In this case, Physical layer is operational. The line protocol being down indicates a clocking or framing problem. Probable reasons for this are encapsulation and clock rate mismatches.
How do you check how long a port has been down?
In order to check to see how long the port is in Up or Down status, use the show interfaces [interface id] command. In the example, under the show interfaces FastEthernet0/1 command, look at a line that shows something such as: Last input 00:00:41, output 00:00:00, output hang never.
What is the reason that the interface status is administratively down line protocol 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.
Do you show interface brief?
The show ip interface brief command can be used to view a summary of the router interfaces. This command displays the IP address, interface status, and additional information.
What command would you enter if an interface was administratively down?
You can mark an interface administratively down with the “shutdown” command, and turn it on with the “no shutdown” command. If an interface is shut down, it will display administratively down when using the “show interface” command.
How do I check my router uptime?
The show system uptime command by itself shows system-wide uptime information. Use the show system uptime node node-name command to see node-specific uptime information, where node-name can be re0 | re1 | fpc0 | all .
How do I bring up an interface in Linux?
Two methods can be used to bring interfaces up or down.
- 2.1. Using “ip” Usage: # ip link set dev up # ip link set dev down. Example: # ip link set dev eth0 up # ip link set dev eth0 down.
- 2.2. Using “ifconfig” Usage: # /sbin/ifconfig up # /sbin/ifconfig down.
What is the most likely cause when the output of the show interface command shows that a switch interface is up but the line protocol is down?
What is the most likely cause when the output of the show interface command shows that a switch interface is up but the line protocol is down? An encapsulation type mismatch exists. An incorrect cable type has been attached to the interface.
How to check the status of an interface?
The show interfaces status cli command shows you all interfaces. The interfaces that are “up” are in the connected state.
What does show interfaces status CLI Command show?
The show interfaces status cli command shows you all interfaces. The interfaces that are up are in the connected state. The | include connected shows only the lines of the output that contain the word connected. Newer Cisco IOS contain a count parameter that can count lines which match a regex.
How to tell if a service interface is shut down?
Observe service interface indicators to quickly identify the service interface status. The following uses the S6730-H48X6C as an example. In Figure 1-1, the indicator numbered 4 is a 10GE optical interface indicator, and the indicator numbered 5 is a 40GE/100GE optical interface indicator. The interface is not connected or has been shut down.
How to check the status of a switch?
You can view summary or detailed information on the switch ports using the show interfaces status command. To see summary information on all ports on the switch, enter the show interfaces status command with no arguments. Specify a particular module number to see information on the ports on that module only.