1/7/2024 0 Comments Loopback tester rj45![]() Link-level type: Ethernet, MTU: 1514, MRU: 1522, LAN-PHY mode, Speed: 10Gbps, BPDU Error: None, Loop Detect PDU Error: None, Interface index: 187, SNMP ifIndex: 591, Generation: 190 Physical interface: xe-2/0/0, Enabled, Physical link is Up Sample Output show interfaces xe-2/0/0 extensive Mode command: show interfaces ( xe- fpc/ pic/ port | et- fpc/ pic/ port) Is up, use the following Junos OS command-line interface (CLI) operational To verify that the status of the Gigabit Ethernet interface Interfaces interface-name gigether-options hierarchy level, places the interface into local loopback mode. Simply including the loopback statement at the [edit There is no option to use a local or remote statement. On anĮthernet interface, you cannot create a remote loopback, therefore Of the PIC but does not test the transmit and receive ports. A local loopback tests the interconnection When you create a local loopback, you create an internal loop In configuration mode, go to the following hierarchy level: edit interfaces interface-name gigether-optionsĬonfigure the local loopback: [edit interfaces interface-name set loopbackįor example: [edit interfaces xe-2/0/0 showįor example: [edit interfaces xe-2/0/0 commit The transmit port to the receive port, follow these steps: To configure a local loopback without physically connecting Perform Steps 2 through 8 from Diagnose a Suspected Hardware Problem with a Fast Show interfaces (xe- fpc/pic/port | et- fpc/pic/port ) extensive Interface (xe- fpc/pic/port | et- fpc/pic/port count 100Ĭheck for Gigabit Ethernet Interface Error Statistics Show interfaces (xe- fpc/pic/port | et- fpc/pic/port) Ĭlear Gigabit Ethernet Interface StatisticsĬlear interfaces statistics xe- fpc/pic/port | et- fpc/pic/port Show interfaces (xe- fpc/pic/port | et- fpc/pic/port)Ĭonfigure a Static Address Resolution Protocol Table Verify That the Gigabit Ethernet Interface Is Up There are many other factors involved including cabling, connection points and other network appliances but this technique will allow you to rule out those factors and confirm the functionality of your hardware.For Using Loopback Testing for 10, 40, and 100 Gigabit Ethernet Interfacesĭiagnose a Suspected Hardware Problem with a GigabitĬreate a Physical Loopback for a Fiber-Optic InterfaceĬonnect the transmit port to the receive port. In conclusion, a loopback test is an easy way to confirm that your current hardware is working properly. Loopback created with single fiber strand If not, further troubleshooting is necessary. If lit, the port of hardware is functioning properly. Once the ports are connected review the status of the link light. If using a loopback module the Tx and Rx ports will be connected to each other, if using a transceiver install the isolated ends of the same strand of cabling to the transmit and receive ports of the transceiver.ģ. (If testing a module with a 40km or greater reach utilize the appropriate optical attenuator).Ģ. Install transceiver or loopback module into switch. Remove collar and isolate both ends of the same strand of cable How to perform and confirm a loopback test using a single strand of fiber:ġ. Creating a single strand of fiber out of a duplex cable takes a couple of extra steps.Ģ. It requires a self-contained loopback module or a single strand of fiber. ![]() A loopback test eliminates superfluous connections and confirms that a transceiver or port is functioning properly by connecting the transmitter and receiver of the same module.
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