What does the information displayed on an AR router mean after the Tracert command is run


The Tracert command is used to test gateways through which a test packet passes from the transmission host to a destination.
For details, choose Troubleshooting
> Ping and Tracert through the URL: Product Documentation.

Other related questions:
After I run the display fib command, what does flag mean in the command output
Currently, Flag can have the following values:
  • B: a blackhole route, that is, a route with the outbound interface NULL0.
  • D: a route generated by a dynamic routing protocol such as Intermediate System to Intermediate System routing protocol (IS-IS), open shortest path first (OSPF), Border Gateway Protocol (BGP), or Routing Information Protocol (RIP).
  • G: a gateway route, that is, a route with a gateway as the destination address.
  • H: a host route.
  • S: a static route, that is, a route configured using the ip route-static command or configured on the network management system (NMS).
  • U: a route that is reachable.

An AR router does not respond to a Tracert command, but can be pinged
By default, the function of responding to a Tracert request is not enabled on the AR router. Run the icmp port-unreachable command in the system view. Run a send command to enable the packet transmission function for the ICMP interfaces.

What is the meaning of the tracert command output on an S series switch
For S series switches (except the S1700), the tracert command displays information about the path on which packets are sent from the source to the destination and checks network connectivity. When a fault occurs on the network, you can run this command to locate the fault. This command is used as follows: [HUAWEI] tracert traceroute to,max hops: 30 ,packet length: 40,press CTRL_C to break 1 23 ms 12 ms 6 ms 2 * * * 3 5 ms !<10> 5ms !<10> 6ms !<10> The command output is described as follows: 1 indicates the first-hop gateway. The sequence number increases by each hop. By default, the maximum number of hops is 30. indicates the gateway address of the first hop. The IPv4 address following the serial number of each hop is the gateway address of the hop. 23 ms 12 ms 6 ms indicates the time difference between the three sent UDP packets and the received ICMP Time Exceeded or ICMP Destination Unreachable packets. * * * indicates that no ICMP Time Exceeded packet or ICMP Destination Unreachable packet is received on the second-hop device within a specified period. ! indicates an ICMP Destination Unreachable packet. <10> indicates that the value of the Code field in the ICMP packet is 10, which means that the Destination host is administratively prohibited. There are no reachable routes between the destination host and the source address. This packet is sent by the default gateway of the destination host. For the meanings of other values of the Type and Code fields in an ICMP packet, see Chapter 6 in TCP/IP Illustration Volume I.

How to stop the display of diagnostic information after running the display diagnostic-information command through the console port on CE series switches
After the display diagnostic-information command is executed through the console port, it takes a long period to display diagnostic information when a lot of information needs to be displayed. However, pressing CTRL+C cannot stop the display of diagnostic information.
To stop the display of diagnostic information, log in to the device through Telnet and then run the kill user-interface console command to terminate the console interface connection.
<HUAWEI> kill user-interface console 0

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