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

[Keunhong Lee]

DPDK's igb_uio driver does not generate 'netdev' interfaces,
so you cannot see any interface via ifconfig.
(However, they are registered as 'rte_eth_dev' in your DPDK application.)

You'd better to use KNI drivers to have 'netdev' intefaces.

Keunhong.


2015-06-29 8:51 GMT+09:00 Abhishek Verma <abhishekv.verma at gmail.com>:

> 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
>