Wednesday, May 22, 2019

Show interfaces status command

The Interface State command appears
Interface status can be verified on the Cisco key using the show interface TYPE command for the show interface. Consider the following example:



SW1 # Displays fa0 / 1 interfaces
FastEthernet0 / 1 Active, Line Protocol Active (connected)
The device is Lance, the address is 0040.0b21.0b01 (bia 0040.0b21.0b01)
BW 100000 Kbit, DLY 1000 usec,
Reliability 255/255, txload 1/255, rxload 1/255
ARPA packaging, loopback is not set
Set Keepalive (10 seconds)
Two-way, 100 Mb / s
Input flow control is disabled, output flow control is disabled
Type ARP: ARPA, ARP Timeout 04:00:00
Last Login 00:00:08, exit 00:00:05, exit is not blocked
The last cancellation of the Show Interface counters is never done
Input queue: 0/75/0/0 (size / max / droplets / flush); Total output decreases: 0
Strategy Queue: fifo
Output queue: 0/40 (size / max)
Input frequency of 5 minutes 0 bits / sec, 0 packets / sec
Output speed is 5 minutes 0 bits / sec, 0 packets / sec
956 input packet, 193351 bytes, 0 no buffer
Received 956 transmissions, 0 runes, 0 Giants, 0 throttles
Input errors 0, 0 CRC, 0 Window, 0 Override, 0 Ignore, 0 Abort
0 IEA, 0 multicast, 0 pause input
0 Input packets with dribble detection mode
2357 outgoing package, 263570 bytes, 0 overrides
0 output errors, 0 collisions, 10 interface reset
0 chatter, 0 collision late, 0 postpone
0 carrier company missing, 0 carrier company no
0 The output buffer fails, 0 exchange the output buffers

As you can see from the above output, this gives us a lot of information about the selected interface. The following is a brief description of the most important lines:

FastEthernet0 / 1 Active, Active Line Protocol (Connected) - Indicates that the interface is in the active state
The device is Lance, the address is 0040.0b21.0b01 - Lance refers to the chip used by the port. The MAC address of the port is also listed
BW 100000 Kbps, DLY 1000 usec - Bandwidth and interface delay
Fully duplex printer, 100 MB / s - The port operates in full duplex mode and supports speeds up to 100MB / s
956 Entry Pack, 193351 Bytes, 0 No Stores - The total number and size of packets received by the port.
Received 956 transmissions: The total number of packets received by the device.
Input errors 0, 0 CRC, 0 Window ... - Number of received packets received incorrectly.
2357 Outbound packets, 263570 bytes, 0 Overrides: The total number and size of packets sent from the port.
Output errors 0, 0 Conflicts: The number of packets that were not sent due to an error and number of Ethernet collisions.

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