Router interface parameters and meanings

Router interface parameters and meanings router # sh int fa0/0 FastEthernet0/0 is up, line protocol is up Hardware is MV96340 Ethernet, address is 0021. d800.0000 (bia 0021. d800.0000) Description: Internet address is 1.1.1.1/30 MTU 1500 bytes, BW 10000 Kbit/sec, DLY 100 usec, reliability 255/255, txload 48/255, rxload 64/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Full-duplex, 100 Mb/s, 100 BaseTX/fx arp type: AR PA, ARP Timeout 04:00:00 Last input 00:00:01, output 00:00:00, output hang never Last clearing of "show interface" counters 10w0d Input queue: 0/75/0/0 (size/max/drops/flushes ); total output drops: 0 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute input rate 2545000 bits/sec, 742 packets/sec 5 minute output rate 1895000 bits/sec, 783 packets/sec 718040814 packets input, 2593098790 B Ytess provisioned ed 2391873 broadcasts, 0 runts, 0 giants, 0 throttles 75 input errors, 0 CRC, 0 frame, 0 overrun, 75 ignored 0 watchdog 0 input packets with dribble condition detected 1512883017 packets output, 522013619 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 unknown protocol drops 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier 0 output buffer fail Ures, 0 output buffers swapped out Fast Ethernet... is up... is administratively down indicates whether the hardware of the interface is activated or manually showdown by the Administrator. Line protocol is the line protocol that identifies the interface, that is, whether the software process is available or manually shutdown by the Administrator. Www.2cto.com Hardware type (such as MCI Ethernet, SCI, cBus Ethernet) and Hardware address Internet address IP address of the interface with subnet information. The maximum transmission unit on the MTU interface. The bandwidth of the BW interface, usually measured in kb/s. The delay of the DLY port, in ms. Rely calculates the reliability parameter (255 is 255/255 reliability) of an interface with a reference value of in 5 minutes. Load is calculated based on the load of an interface with a reference of 255 (255/255 is the load of) and the average of 5 minutes. Encapsulation type of the Encapsulation interface. The type of the Address Resolution Protocol (ARP) configured by the ARP type interface. Loopback identifies whether interface loopback is set. Keepalive identifies whether the interface sets the time when the Last input of the keepalives message is received by the interface. When the packet is forwarded by the precess-switch method, the counter is updated. When the packet is forwarded by the fast-switch method, the counter is not updated. Output time since the interface sent the most recent data packet. The output hang interface restarts after a long packet transmission time. If the packet is not restarted, it is displayed as never. Last clearing clears the time after the counter is counted. Note: It is not cleared when it may affect the variable information of the route. For example, the load and reliablity models *** indicate that the time after the calculator is cleared is too long. Number of data packets in the Output queue, input queue, and drops in the interface input/Output queue. Each number is followed by the maximum number/queue range. And the number of dropped packets that exceed the maximum queue range. Www.2cto.com 5 minute input rate, the average value of 5 minute output rate data packets transmitted per second in the last five minutes. Total number of packets received by the packets input system. The number of bytes of all packets received by the bytes system, including data and MAC encapsulation. No buffer indicates the number of discarded packets because there is not enough cache in the system. It can be compared with the Count of ignore. Poor transmission quality of a broadcast storm over Ethernet and a serial interface may usually lead to an increase in this counter. The number of broadcast and multicast packets Received by the broadcasts interface. Runts discards the number of data packets because it is smaller than the minimum package size of the media. For example, for Ethernet, a packet smaller than 64 bytes is considered as a runt. The number of data packets discarded by giants because it is larger than the maximum package size of the media. For example, for Ethernet, a packet larger than bytes is considered as a giant. The number of disable operations on the throttles interface may be caused by factors such as cache or processor overload. Input errors includes all the counters of runts, giants, no buffer, CRC, frame, overrun, and ignored. Other input-related error packets can also increase the input errors counter. At the same time, a data packet may contain multiple errors. The number of Cyclic Redundancy checksum received by the CRC interface. In the LAN, it is usually because of the quality of the line or the transmission of hardware. a relatively high number of CRC is usually caused by some workstation sending a large number of bad data packets. The number of packets received by frame containing CRC errors and non-integer decimal numbers. In Lan, it is usually because of too many collisions or Ethernet device faults. Overrun is because the input speed exceeds the processing capability of the receiver's hardware and does not have the number of times the hardware cache is processed. Ignored is different from the system cache because the interface's internal cache causes the number of received packets to be ignored. The number of data packets interrupted when the abort accepts the packet. Input packets with dribble condition detected Frame ultra-long input data packets. The number of data packets sent by the packets output system. Bytes of all data packets (including data and MAC encapsulation) received by the bytes system. The number of times the router cannot process the underruns sender's transmission too fast. The output errors interface considers the total number of errors of all transmitted data packets. At the same time, a data packet may contain multiple errors. The number of packets that are retransmitted by www.2cto.com collisions due to an Ethernet conflict. Number of times the interface resets interface is restarted. Data packets that enter the queue in a few seconds are not transmitted. On the serial interface, it may be because the transmitted modem fails and the clock signal or cable is not sent. If the system finds that the serial carrier signal interface is up but the protocol is down, the interface tries to restart itself periodically. The interface may also be restarted when the interface is loose or shut down. The timer transmitted by babbles. The collision that occurs after the late collision transmits the packet overhead is called late collisions. Generally, late collision occurs because the ethernet cable is too long and exceeds the distance it can transmit. Due to carrier issues, deferred delays frame transmission. The number of times the carrier is lost during lost carrier transmission.