How to test loopback cable
![how to test loopback cable how to test loopback cable](https://i.ytimg.com/vi/5W4G-20y5N8/mqdefault.jpg)
Interface flags: SNMP-Traps Internal: 0x4000ĬoS queues : 8 supported, 4 maximum usable queuesĬurrent address: 00:1f:12:fe:c5:2e, Hardware address: 00:1f:12:fe:c5:2e MAC-REWRITE Error: None, Loopback: Enabled, Source filtering: Disabled,įlow control: Enabled, Auto-negotiation: Enabled, Remote fault: Onlineĭevice flags : Present Running Loop-Detected Link-level type: Ethernet, MTU: 1514, Speed: 1000mbps, BPDU Error: None, Sample Output show interfaces ge-4/0/6 extensive Physical interface: ge-4/0/6, Enabled, Physical link is Up Interface index: 144, SNMP ifIndex: 516, Generation: 147 Interface (CLI) operational mode command: show interfaces ( fe- fpc/ port | ge- fpc/ pic/ port) To verify that the status of the Fast Ethernet or GigabitĮthernet interface is up, use the following Junos OS command-line | gigether-options] hierarchy level, places the interface into Interfaces interface-name (fastether-options 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
![how to test loopback cable how to test loopback cable](https://i2.wp.com/ipwithease.com/wp-content/uploads/2020/06/Create-Ethernet-Loopback-Cable.jpg)
When you create a local loopback, you create an internal loop In configuration mode, go to the following hierarchy level: edit interfaces interface-name (fastether-options | gigether-options)Ĭonfigure the local loopback: [edit interfaces interface-name (fastether-options | set loopbackįor example: [edit interfaces fe-1/0/0 showįor example: [edit interfaces fe-1/0/0 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 (fe- fpc/pic/port | ge- fpc/pic/port ) extensive Interface (fe- fpc/pic/port | ge- fpc/pic/port count 100 rapidĬheck for Fast Ethernet or Gigabit Ethernet Interface Ping the Fast Ethernet or Gigabit Ethernet Interface Interface-name unit logical-unit-number family inet addressĬlear Fast Ethernet or Gigabit Ethernet InterfaceĬlear interfaces statistics fe- fpc/pic/port | ge- fpc/pic/port Show interfaces ge- fpc/pic/port [edit interfaces Show interfaces (fe- fpc/pic/port | ge- fpc/pic/port)Ĭonfigure a Static Address Resolution Protocol Table Verify That the Fast Ethernet or Gigabit Ethernet Interface-name (fastether-options | gigether-options)] For Using Loopback Testing for Fast Ethernet and Gigabit Ethernetĭiagnose a Suspected Hardware Problem with a FastĬreate a Physical Loopback for a Fiber-Optic InterfaceĬonnect the transmit port to the receive port.Ĭreate a Loopback Plug for an RJ-45 Ethernet InterfaceĬross pin 1 (TX+) and pin 3 (RX+) together, and pin 2