Interface name
|
Displays the name of the current interface. In the example, the interface name is TenGigE0/1/0/1.
|
Interface state
|
Displays the state of the interface. In the example, the interface is in the administratively down state.
|
Interface state transitions
|
Displays the number of times the interface has changed the state.
Note
|
- Interface state transitions command counts only if the interface stays up. If the line protocol flaps, then it is not counted.
-
Interface state transitions counts the state when the line protocol state changes the state from up to down/admin-down or
admin-down/down to up. If an interface changes the state from down to admin-down or admin-down to down, the counter is not
incremented.
-
Use the clear state-transitions command to clear the counter for the current or all interfaces.
|
|
line protocol state
|
Displays the state of the Layer 2 line protocol. This field may be different from the interface state if, for example, a keepalive
failure has brought down the Layer 2.
Note
|
The line protocol state is not the same as the protocol state displayed in the show ip interfaces command, because it is the state of Layer 2 (media) rather than Layer 3 (IP protocol).
|
|
Hardware
|
Displays the current hardware type.
|
address is n.n.n.n/n
|
Displays the Layer 2 address (MAC address for Ethernet interfaces).
Note
|
Enter the mac-address command to configure the hardware address.
|
|
bia
|
Displays the burned-in address (BIA) for the interface. The BIA is the default L2 (MAC) address for the interface.
Note
|
The BIA is not configurable.
|
|
description
|
Displays the user-defined string that is associated with the interface.
Note
|
Enter the description command to configure the description associated with the interface.
|
|
Internet address
|
Displays the Layer 3 (IP) address for the interface.
Note
|
Enter the ipv4 address command to configure the internet address for the interface.
|
|
MTU
|
Displays the maximum transmission unit (MTU) for the interface. The MTU is the maximum packet size that can be transmitted
over the interface.
Note
|
The MTU field indicates the interface MTU. Enter the mtu command to configure a lower MTU value at the Layer 3 level.
|
|
BW
|
Displays the bandwidth of the interface in kbps.
|
reliability
|
Displays the proportion of packets that are not dropped and do not have errors.
Note
|
The reliability is shown as a fraction of 255.
|
|
txload
|
Indicates the traffic flowing out of the interface as a proportion of the bandwidth.
Note
|
The txload is shown as a fraction of 255.
|
|
rxload
|
Indicates the traffic flowing into the interface as a proportion of the bandwidth.
Note
|
The rxload is shown as a fraction of 255.
|
|
Encapsulation
|
Layer 2 encapsulation installed on the interface.
|
CRC
|
Indicates the length of the cyclic redundancy check (CRC), in bytes.
Note
|
The CRC is not present for all interface types.
|
Note
|
Enter the pos crc command to configure the CRC.
|
|
loopback or controller loopback
|
Indicates whether the hardware has been configured to be looped back.
Note
|
Enter the loopback command to configure the loopback or controller loopback.
|
|
keepalive
|
Displays the configured keepalive value, in seconds.
Note
|
Enter the keepalive command to configure the value of the keepalive field.
|
Note
|
The keepalive field may not be present if it is not applicable to the interface type.
|
|
Duplexity
|
Displays the duplexity of the link.
Note
|
This field is present only for shared media.
|
Note
|
For some interface types, you can configure the duplexity by entering the full-duplex and half-duplex commands.
|
|
Speed
|
Speed and bandwidth of the link in Mbps. This field is present only when other parts of the media info line are also displayed
(see duplexity and media type).
|
Media Type
|
Media type of the interface.
|
output flow control
|
Whether output flow control is enabled on the interface.
|
input flow control
|
See output flow control.
|
ARP type
|
Address Resolution Protocol (ARP) type used on the interface. This value is not displayed on interface types that do not use
ARP.
|
ARP timeout
|
ARP timeout in hours:mins:secs. This value is configurable using the arp timeout command.
|
Last clearing of counters
|
Time since the following counters were last cleared using the clear counters exec command in hours:mins:secs.
|
Input rate
|
Average number of bits and packets received per second during the load-interval. If the interface is not in promiscuous mode,
it senses network traffic that it sends and receives (rather than all network traffic).
Note
|
Load duration is based on load-interval configured under the interface. The default load duration is 5 minutes, if load-interval
is not configured under the interface.
|
Note
|
The input rate should be used only as an approximation of traffic per second during a given load duration. This rate is exponentially
weighted average with a time constant of load duration. A period of four time constants must pass before the average will
be within two percent of the instantaneous rate of a uniform stream of traffic over that period.
|
|
packets input
|
Number of packets received on the interface that were successfully delivered to higher layers.
|
bytes input
|
Total number of bytes successfully received on the interface.
Note
|
This does not include FCS bytes.
|
|
total input drops
|
Total number of packets that were dropped after they were received. This includes packets that were dropped due to configured
quality of service (QoS) or access control list (ACL) policies. This does not include drops due to unknown Layer 3 protocol.
|
drops for unrecognized upper-level protocol
|
Total number of packets that could not be delivered because the necessary protocol was not configured on the interface.
|
Received broadcast packets
|
Total number of Layer 2 broadcast packets received on the interface. This is a subset of the total input packet count.
|
Received multicast packets
|
Total number of Layer 2 multicast packets received on the interface. This is a subset of the total input packet count.
|
runts
|
Number of received packets that were too small to be handled. This is a subset of the input errors count.
|
giants
|
Number of received packets that were too large to be handled. This is a subset of the input errors count.
|
throttles
|
Number of packets dropped due to throttling (because the input queue was full).
|
parity
|
Number of packets dropped because the parity check failed.
|
input errors
|
Total number of received packets that contain errors and hence cannot be delivered. Compare this to total input drops, which
counts packets that were not delivered despite containing no errors.
|
CRC
|
Number of packets that failed the CRC check.
|
frame
|
Number of packets with bad framing bytes.
|
overrun
|
Number of overrun errors experienced by the interface. Overruns represent the number of times that the receiver hardware is
unable to send received data to a hardware buffer because the input rate exceeds the receiver's ability to handle the data.
|
ignored
|
Total number of ignored packet errors. Ignored packets are those that are discarded because the interface hardware does not
have enough internal buffers. Broadcast storms and bursts of noise can result in an increased number of ignored packets.
|
abort
|
Total number of abort errors on the interface.
|
packets output
|
Number of packets received on the interface that were successfully delivered to higher layers.
|
bytes output
|
Total number of bytes successfully received on the interface.
Note
|
This does not include FCS bytes.
|
|
total output drops
|
Number of packets that were dropped before being transmitted
|
Received broadcast packets
|
Number of Layer 2 broadcast packets transmitted on the interface. This is a subset of the total input packet count.
|
Received multicast packets
|
Total number of Layer 2 multicast packets transmitted on the interface. This is a subset of the total input packet count.
|
output errors
|
Number of times that the receiver hardware was unable to handle received data to a hardware buffer because the input rate
exceeded the receiver's ability to handle the data.
|
underruns
|
Number of underrun errors experienced by the interface. Underruns represent the number of times that the hardware is unable
to transmit data to a hardware buffer because the output rate exceeds the transmitter’s ability to handle the data.
|
applique
|
Number of applique errors.
|
resets
|
Number of times that the hardware has been reset. The triggers and effects of this event are hardware-specifc.
|
output buffer failures
|
Number of times that a packet was not output from the output hold queue because of a shortage of MEMD shared memory.
|
output buffers swapped out
|
Number of packets stored in main memory when the output queue is full; swapping buffers to main memory prevents packets from
being dropped when output is congested. The number is high when traffic is bursty.
|
carrier transitions
|
Number of times the carrier detect (CD) signal of a serial interface has changed state.
|