Router network interface port (2)

Router network interface port (2) (9) encapsulate this field to indicate the encapsulation method assigned to the interface. In the preceding example, encapsulation is shown as ARPA, which is a standard Ethernet 2.0 encapsulation method. Other encapsulation methods include the IEEE 802.3 Ethernet keyword iso1 and the IEEE 802.3 protocol keyword snap (subnet Access Protocol) protocol variation. (10) the send-back field indicates whether the interface is in the running send-back mode. If you set send-back, this is a common problem that occurs when a technician puts the interface into the send-back interface for testing at night and forgets to reset send-back, this will lead to some interesting calls to the control center the next morning. You can use the Loopback interface setting command to place the interface in the running return mode. The Loopback command has no parameters. Use the no Loopback command to delete or disable the send back command. The following example shows how to set the Ethernet interface to the return mode. Interface ethernet0/0Loopback you can use the show interface loopbackEXEC command to view the status of the delivery. If your vro has a large number of interfaces and technicians perform regular inspections, it is a good idea to use this command early in the morning to avoid unnecessary problems. (11) ARP type this field indicates the allocated Address Resolution Protocol (ARP) type. In an IP environment, the ARP type is ARPA. By default, the Ethernet interface uses the ARPA keyword to encapsulate the ARPA on the specified IP interface. You can use the arp interface command to change the encapsulation to hp probe or SNAP. The command format is as follows: arp {arpa/probe/snap} Please note that HPProbe is used by IOS to try to parse the local data connection address of 802.3 or Ethernet. The ARP type should be set to probe so that one or more router interfaces can communicate transparently with the HP 802.3 host using address resolution technology called "virtual address request and reply. (12) ARP timeout this field indicates the length of time that ARP entries remain in the cache before cleaning when they are not active. The default value of ARP timeout is 4 hours. As shown in the preceding example, you can use the ARP timeout command to adjust the duration of ARP cache items in the cache. The command format is as follows: input and output at the end of arp timeout seconds (13). This field indicates the hours, minutes, And seconds since the last group or detection interface was successfully received or sent. You can use the value in this field to determine whether the active interface is still active or when the interface fails. About the former, enter the second show interface command 10 seconds or 1 minute after the first show interface command indicates the new final output of the interface (which can also indicate whether a problem occurs. It also indicates that if a problem occurs, it is not because the group cannot be received. For example, in the above example, the last successful input occurs 2 seconds ago. If we wait a few seconds and release another show interface command, we can get updates to this counter. (14) The output interrupt field indicates the time since the last reset of the interface because the sending time is too long. The value of this field is specified by hour, minute, or second, or will never be displayed if no interruption occurs (hang. If the number of hours since the last reset exceeds 24, the days and hours are displayed until the field benefit is exceeded. In this case, the asterisk (*) is displayed in this field (*). (15) The last time this field is cleared indicates the time at which the interface counter of the measurement accumulative statistics was last reset to 0. Clearing will affect almost all statistical information, except routing statistics such as load and reliability. The actual value displayed in the last clear operation is based on the 32-bit ms counter. An asterisk (*) indicates that the counter cannot be displayed after a long period of time, and 0:00:00 indicates that the counter is cleared before the 31 Power ms of 2 to the 32 power ms of 2. The last clear value on many routers is represented by weeks, months, days, and hours. For example, in the above example, the last time the show interfaces counter is cleared, it is displayed as 1w2d. (16) queuing policy this field indicates the pairing policy assigned to the interface. First in first out, FIFO by default ). If a priority pair method is previously assigned to an interface, this pair method is listed in this field.