Contents
- 1 What is a line protocol Cisco?
- 2 What does a link status of Up Up indicate?
- 3 Why is line protocol down?
- 4 Why tunnel protocol is down?
- 5 What does it mean when line protocol is down?
- 6 What is meant by line protocol down?
- 7 Where do data link protocols operate in OSI?
- 8 Do you need to support the PPP link control protocol?
What is a line protocol Cisco?
Protocol refers to “Line Protocol”, which is a Cisco way of saying “the connection”. Basically, up/down means the port is available for a cable/connection, but doesn’t have one. Check the cable, or other computer.
What does a link status of Up Up indicate?
If the link status displays UP, it means that the connection is complete and a session can be started.
What is interface status?
The first line of the output indicates the working state of the interface. The first status code (known as line status) indicates that the Layer 1 is working (FastEthernet0/1 is up). Finally, the word at the end of the line indicates the working state of the interface (connected in our case).
What does it mean when an interface is down?
When you bring the interface up/down you’re merely setting a flag on the driver that the state of the interface is up or down. The NIC is still powered on and can participate in WOL (Wake on LAN) etc.
Why is line protocol 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.
Why tunnel protocol is down?
Up/down – This implies that, even though the tunnel is administratively up, something causes the line protocol on the interface to be down. This usually happens when the tunnel is misconfigured with a Next Hop Server (NHS) that is it’s own IP address.
What does link status down mean?
ethernet speed clock-speed. For any networking (ethernet) equipment, the link status (layer 1) is down when there is a speed mismatch between two ethernet interfaces (say: one is 10 Mbit and another is 100 Mbit).
What is the line protocol state?
A line protocol tells you whether the interface line missed the last three keepalives. If so, the column shows “down” for that interface.”
What does it mean when line protocol is down?
What is meant by line protocol down?
What is the purpose of the line protocol?
line protocol A formally specified set of possible bit sequences that will guarantee that two ends of a communication link will be able to pass information between them in an understandable way.
Which is an example of a data link protocol?
The services provided by the data link protocols may be any of the following − Framing − The stream of bits from the physical layer are divided into data frames whose size ranges from a few hundred to a few thousand bytes.
Where do data link protocols operate in OSI?
The data link protocols operate in the data link layer of the Open System Interconnections (OSI) model, just above the physical layer. The services provided by the data link protocols may be any of the following −
Do you need to support the PPP link control protocol?
The PPP control signals, known as the PPP Link Control Protocol (LCP), need not be supported, but are strongly recommended to improve performance. Other control information is included by means of a Network Control Protocol (NCP), which defines management procedures for frame content protocols. The NCP even allows protocols other than IP to use