Link Down , Unable to use MoonGen.

[prashantharaonr]

Hello,

I am trying to use MOONGen, I got the following error. I did updates of the driver (one NIC Intel X550T2 and second Intel X550T)and the OS is Debian buster with kernel 4.19.0-8-amd64. Kindly help how to proceed.

user@user:~/MoonGen$ sudo ./build/MoonGen examples/l3-load-latency.lua 0 1 [INFO] Initializing DPDK. This will take a few seconds... EAL: Detected 8 lcore(s) EAL: Probing VFIO support... EAL: PCI device 0000:01:00.0 on NUMA socket -1 EAL: Invalid NUMA socket, default to 0 EAL: probe driver: 8086:15d1 net_ixgbe EAL: PCI device 0000:02:00.0 on NUMA socket -1 EAL: Invalid NUMA socket, default to 0 EAL: probe driver: 8086:1563 net_ixgbe EAL: PCI device 0000:02:00.1 on NUMA socket -1 EAL: Invalid NUMA socket, default to 0 EAL: probe driver: 8086:1563 net_ixgbe [INFO] Found 3 usable devices: Device 0: 00:00:00:00:00:00 (Intel Corporation Ethernet Controller 10G X550T) Device 1: 11:11:11:11:11:11 (Intel Corporation Ethernet Controller 10G X550T) Device 2: 22:22:22:22:22:22 (Intel Corporation Ethernet Controller 10G X550T) PMD: ixgbe_dev_link_status_print(): Port 0: Link Down PMD: ixgbe_dev_link_status_print(): Port 1: Link Down [INFO] Waiting for devices to come up... [ERROR] Device 0 (00:00:00:00:00:00) is DOWN: 0 MBit/s [ERROR] Device 1 (11:11:11:11:11:11) is DOWN: 0 MBit/s [INFO] 0 devices are up. [WARN] Failed to set rate limiter on queue [TxQueue: id=0, qid=0]: Invalid argument [INFO] Performing ARP lookup on 10.1.0.10 [INFO] Performing ARP lookup on 10.1.0.10 [INFO] ARP lookup failed, using default destination mac address [INFO] ARP lookup failed, using default destination mac address [WARN] Packet size 60 is smaller than minimum timestamp size 84. Timestamped packets will be larger than load packets.

Regards Rao

[harshgondaliya]

I think your links are not up. The following is what I am able to think of:

1. Please make sure that the entire link is UP. Meaning:

• Two ports to be binded to MoonGen are UP.

• Two Moongen ports are connected via working optic cable to two ports on the other side.

• (IMP) The two ports on the other end of link are also UP.

2. If you are ubuntu user try commands like:ip link set eth0 up On my ethernet card, there are LEDs that show whether the link is UP or DOWN. If such LEDs are available, check for its status.

[emmericp]

Does it work with Linux? Does it work with other DPDK examples?

[harshgondaliya]

Yes, I am using a Linux machine with Intel Ethernet Server Adapter X520-DA2 NIC. Everything works as expected for me. But yes, while running l3-load-latency.lua, if ports on the other side of the link are down, then I too get the same error as prashantharaonr.

[jabir366]

Have you tried connecting a cable from port zero to port 1 ? this should work anyway,