![]() In addition, 127.0.0.1 allows us access to the network services running on the originating machine. In IBM Navigator for i, expand IBM i Management > Network > All Tasks > TCP/IP Configuration and click Work with Ping. Perform either of the following steps depending. < Huawei > system-view Huawei interface serial 4/0/0 Huawei -Serial4/0/0 fe1 loopback local.Example for enabling an internal loopback test on interface 4/0/0. Check whether the link between the two ends works normally. So why do we need to establish a connection with the originating device? In some cases, we would want to validate the Internet Protocol (IP) stack on a device connected to the network. MS-Widows user can use ping -6 command as described here. Run the fe1 loopback remote command to configure a remote loopback test. Minimum = 0ms, Maximum = 0ms, Average = 0ms ![]() Now is that ping different from normal ping. Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),Īpproximate round trip times in milli-seconds: I have seen the lab for CCNP ROUTE exam it stataes that you must aable to ping and telnet from loopback interface 101 on R1 to ip address like 172.1.1.1. The ping command is only showing the first reply it gets, in your case your own PC (127.0.0.1 is loopback) was the quickest. Reply from 127.0.0.1: bytes=32 time<1ms TTL=128 255.255.255.255 is a broadcast address, you are sending a ping to every device on your local network and you will get a reply from every device. An IP packet is not sent to a physical device. The command examples below use the IPv4 standard loopback address, 127.0.0.1, or the IPv6 standard loopback address, ::1. The Ping loopback is an internal software test. For example, entering the command in a command prompt window will connect with the originating device: C:\Users>ping 127.0.0.1 To ping the loopback interface on your system to troubleshoot the problem, follow these steps: At the command line, type these commands: For IPv4: PING '127.0.0.1' or PING LOOPBACK For IPv6: PING '::1' or PING IPV6-LOOPBACK See PING parameters to fine-tune the PING command to get the most accurate results. Pinging loopback is used to verify the installation of TCP/IP in the z/OS Communications Server environment. It makes little sense to put a default route on the loopback interface, because the only place it can send packets to is the imaginary piece of wire. whatever you send to it is received on the interface. The only purpose of the loopback interface is to return the packets sent to it, i.e. 127.0.0.1 is a non-routable, private IP address used to establish a connection with the same device on which the address was entered. The loopback interface is a virtual interface. 127.0.0.1 is an IP address that is specifically assigned to the loopback interface, i.e a loopback address.
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