[dpdk-dev] Interface once added to DPDK goes missing from ifconfig

Abhishek Verma abhishekv.verma at gmail.com
Mon Jun 29 01:51:49 CEST 2015


Hi,

I have three ethernet interfaces in my VirtualBox as shown below:

root at VirtualBox:/home/akabra/dpdk/dpdk-2.0.0/tools# ifconfig
eth1      Link encap:Ethernet  HWaddr 08:00:27:3f:34:56
      inet addr:192.168.0.123  Bcast:192.168.0.255  Mask:255.255.255.0
      inet6 addr: fe80::a00:27ff:fe3f:3456/64 Scope:Link
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:132 errors:0 dropped:0 overruns:0 frame:0
      TX packets:26 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000
      RX bytes:20982 (20.9 KB)  TX bytes:3724 (3.7 KB)

eth2      Link encap:Ethernet  HWaddr 08:00:27:f7:13:f5
      inet addr:1.1.1.1  Bcast:1.1.1.255  Mask:255.255.255.0
      inet6 addr: fe80::a00:27ff:fef7:13f5/64 Scope:Link
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:51932 errors:0 dropped:0 overruns:0 frame:0
      TX packets:660805 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000
      RX bytes:32407739 (32.4 MB)  TX bytes:1647410289 (1.6 GB)

lo        Link encap:Local Loopback
      inet addr:127.0.0.1  Mask:255.0.0.0
      inet6 addr: ::1/128 Scope:Host
      UP LOOPBACK RUNNING  MTU:65536  Metric:1
      RX packets:1681 errors:0 dropped:0 overruns:0 frame:0
      TX packets:1681 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0
      RX bytes:358901 (358.9 KB)  TX bytes:358901 (358.9 KB)

root at manav-VirtualBox:/home/globus/dpdk/dpdk-2.0.0/tools#
./dpdk_nic_bind.py --status



Network devices using DPDK-compatible driver

============================================

<none>

Network devices using kernel driver

===================================

0000:00:03.0 '82540EM Gigabit Ethernet Controller' if=eth1 drv=e1000
unused=igb_uio,vfio-pci *Active*

0000:00:08.0 '82540EM Gigabit Ethernet Controller' if=eth2 drv=e1000
unused=igb_uio,vfio-pci *Active*


I will now add eth2 to DPDK

root at manav-VirtualBox:/home/globus/dpdk/dpdk-2.0.0/tools# sudo ifconfig
eth2 down

root at manav-VirtualBox:/home/globus/dpdk/dpdk-2.0.0/tools#
./dpdk_nic_bind.py -b igb_uio 0000:00:08.0


I now see that eth2 has been removed from my ifconfig output. I cant seem
to understand why this has happened?


root at manav-VirtualBox:/home/globus/dpdk/dpdk-2.0.0/tools# ifconfig

eth1      Link encap:Ethernet  HWaddr 08:00:27:3f:34:56

          inet addr:192.168.0.123  Bcast:192.168.0.255  Mask:255.255.255.0

          inet6 addr: fe80::a00:27ff:fe3f:3456/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:182 errors:0 dropped:0 overruns:0 frame:0

          TX packets:86 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:27757 (27.7 KB)  TX bytes:12789 (12.7 KB)



lo        Link encap:Local Loopback

          inet addr:127.0.0.1  Mask:255.0.0.0

          inet6 addr: ::1/128 Scope:Host

          UP LOOPBACK RUNNING  MTU:65536  Metric:1

          RX packets:1705 errors:0 dropped:0 overruns:0 frame:0

          TX packets:1705 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:360948 (360.9 KB)  TX bytes:360948 (360.9 KB)


I see that it has been successfully recognized as an interface using DPDK
driver, but why dont i see it in my ifconfig. Any ideas here?


root at manav-VirtualBox:/home/globus/dpdk/dpdk-2.0.0/tools#
./dpdk_nic_bind.py --status



Network devices using DPDK-compatible driver

============================================

0000:00:08.0 '82540EM Gigabit Ethernet Controller' drv=igb_uio
unused=vfio-pci



Network devices using kernel driver

===================================

0000:00:03.0 '82540EM Gigabit Ethernet Controller' if=eth1 drv=e1000
unused=igb_uio,vfio-pci *Active*



Other network devices


Would appreciate some help here.


Thanks, Abhishek


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