* Re: [dpdk-users] TestPMD: Unable to create TAP interface
2018-07-19 22:22 ` [dpdk-users] TestPMD: Unable to create TAP interface Kandy Palanisamy
@ 2018-07-23 19:38 ` Rosen, Rami
0 siblings, 0 replies; 2+ messages in thread
From: Rosen, Rami @ 2018-07-23 19:38 UTC (permalink / raw)
To: Kandy Palanisamy, users
Hi Kandy,
What is the output of
ls -al /dev/net/tun
on that host ?
if it is empty, can you please try:
mkdir /dev/net (if it doesn't exist already)
mknod /dev/net/tun c 10 200
and then launch the same command you used for starting testpmd ?
See:
https://www.kernel.org/doc/Documentation/networking/tuntap.txt
Regards,
Rami Rosen
-----Original Message-----
From: users [mailto:users-bounces@dpdk.org] On Behalf Of Kandy Palanisamy
Sent: Friday, July 20, 2018 01:22
To: users@dpdk.org
Subject: [dpdk-users] TestPMD: Unable to create TAP interface
Hi,
I tried to create a tap device using TestPMD as follows:
testpmd -l 0-3 -n 4 --vdev=net_tap0 -- -i But, I get the error:
PMD: Initializing pmd_tap for net_tap0 as dtap0
PMD: Unable to create TAP interface
PMD: dtap0: tun_alloc() failed.
Appreciate if someone could help what I am missing.
Here is the complete log, and list of modules loaded and the ixgbe interface bound to dpdk.=====================================================================
root@intel-corei7-64:/tmp# /usr/bin/testpmd -l 0-3 -n 4 --vdev=net_tap0 -- -i
EAL: Detected 16 lcore(s)
EAL: Multi-process socket /var/run/.rte_unix
EAL: Probing VFIO support...
EAL: NUMA support not available consider that all memory is in socket_id 0
EAL: PCI device igb_uio 0000:04:00.0: uio device registered with irq 50
0000:04:00.0 on NUMA socket 0
EAL: probe driver: 8086:15ac net_ixgbe
EAL: PCI device 0000:04:00.1 on NUMA socket 0
EAL: probe driver: 8086:15ac net_ixgbe
EAL: PCI device 0000:0a:00.0 on NUMA socket 0
EAL: probe driver: 8086:1533 net_e1000_igb
PMD: Initializing pmd_tap for net_tap0 as dtap0
PMD: Unable to create TAP interface
PMD: dtap0: tun_alloc() failed.
PMD: TAP Unable to initialize net_tap0
vdev_probe(): failed to initialize net_tap0 device
EAL: Bus (vdev) probe failed.
Interactive-mode selected
testpmd: create a new mbuf pool <mbuf_pool_socket_0>: n=171456, size=2176, socket=0
testpmd: preferred mempool ops selected: ring_mp_mc
Warning! port-topology=paired and odd forward ports number, the last port will pair with itself.
Configuring Port 0 (socket 0)
Port 0: 00:13:95:2B:DC:7E
Checking link statuses...
Done
testpmd>
root@intel-corei7-64:/tmp# lsmod
Module Size Used by
rte_kni 20480 0
igb_uio 16384 0
uio 16384 1 igb_uio
8021q 24576 0
nfc 69632 0
bnep 20480 2
intel_rapl 20480 0
igb 167936 0
ixgbe 249856 0
mei_me 28672 0
x86_pkg_temp_thermal 16384 0
intel_powerclamp 16384 0
mei 61440 1 mei_me
mdio 16384 1 ixgbe
coretemp 16384 0
root@intel-corei7-64:/tmp#
root@intel-corei7-64:/tmp#
root@intel-corei7-64:/tmp# dpdk-devbind --status
Network devices using DPDK-compatible driver ============================================
0000:04:00.0 'Ethernet Connection X552 10 GbE SFP+ 15ac' drv=igb_uio unused=ixgbe
Network devices using kernel driver
===================================
0000:04:00.1 'Ethernet Connection X552 10 GbE SFP+ 15ac' if=eth2 drv=ixgbe unused=igb_uio
0000:0a:00.0 'I210 Gigabit Network Connection 1533' if=eth0 drv=igb unused=igb_uio *Active*
::Thanks for your help,Kandy
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