8/12/2023 0 Comments Cisco loopback test ethernetWATCHDOG: task 'master' has not responded for more than 2.00044 seconds - timeout is 2 seconds *** traceback follows *** 1 0x55a7c779561a. 183.72 : tester : TestTSO : Executing PMD using 1 S / 1 C / 2 T dut. TestTSO : Test Case test_perf_TSO_2ports Begin dut. Scapy server is started Trying to bind to igb_uio. ![]() yaml - c 4 pktgen : Starting Scapy server. t - rex - 64 - i - cfg / etc / trex_cfg. Saved to could not modify the DUT mac during the configuration and modify it in the generated file /etc/trex_cfg.yaml. Press ENTER to confirm or enter new file:įile /etc/trex_cfg.yaml already exist, overwrite? (y/N)Y # Config file generated by dpdk_setup_ports.py # Print preview of generated config? (Y/n)Y Please enter a new destination MAC of interface 2: b4:96:91:9f:63:69 Please enter a new destination MAC of interface 1: b4:96:91:9f:63:68įor interface 2, assuming loopback to its dual interface 1.ĭestination MAC is 40:a6:b7:0b:55:78. for flows.Įnter list of interfaces separated by space (for example: 1 3) : 1 2įor interface 1, assuming loopback to its dual interface 2.ĭestination MAC is 40:a6:b7:0b:55:79. Stateful will use order of interfaces: Client1 Server1 Client2 Server2 etc. Please choose an even number of interfaces from the list above, either by ID, PCI or Linux IF | ID | NUMA | PCI | MAC | Name | Driver | Linux IF | Active | Do you want to use MAC based config? (y/N)y 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.By default, IP based configuration file will be created. 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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