Thank You for command, I will try to show as best as I can our device structure. After reading rest of this message please let me know if I can also show another additional command to help you. Our hardware is lanner box http://www.lannerinc.com/download-center/Datasheets/x86-Network-Appliances/?download=1541. So we had 6 NIC-s Few command to show structure of this hardware: root@esehost:/rfshome/eseuser# lspci -tv -[0000:00]-+-00.0 Intel Corporation Atom processor C2000 SoC Transaction Router +-01.0-[01]----00.0 Intel Corporation I210 Gigabit Network Connection +-02.0-[02]----00.0 Intel Corporation I210 Gigabit Network Connection +-03.0-[03]-- +-04.0-[04]-- +-0b.0 Intel Corporation Atom processor C2000 nCPM +-0e.0 Intel Corporation Atom processor C2000 RAS +-0f.0 Intel Corporation Atom processor C2000 RCEC +-13.0 Intel Corporation Atom processor C2000 SMBus 2.0 +-14.0 Intel Corporation Ethernet Connection I354 +-14.1 Intel Corporation Ethernet Connection I354 +-14.2 Intel Corporation Ethernet Connection I354 +-14.3 Intel Corporation Ethernet Connection I354 +-16.0 Intel Corporation Atom processor C2000 USB Enhanced Host Controller +-17.0 Intel Corporation Atom processor C2000 AHCI SATA2 Controller +-18.0 Intel Corporation Atom processor C2000 AHCI SATA3 Controller +-1f.0 Intel Corporation Atom processor C2000 PCU \-1f.3 Intel Corporation Atom processor C2000 PCU SMBus root@esehost:/rfshome/eseuser# lshw -class network PCI (sysfs) *-network description: Ethernet interface product: I210 Gigabit Network Connection vendor: Intel Corporation physical id: 0 bus info: pci@0000:01:00.0 logical name: port-1 version: 03 serial: 00:90:0b:3a:dc:58 capacity: 1Gbit/s width: 32 bits clock: 33MHz capabilities: pm msi msix pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=igb driverversion=5.0.5-k firmware=3.20, 0x80000551 latency=0 link=no multicast=yes port=twisted pair resources: irq:16 memory:dfd00000-dfd7ffff ioport:d000(size=32) memory:dfd80000-dfd83fff *-network description: Ethernet interface product: I210 Gigabit Network Connection vendor: Intel Corporation physical id: 0 bus info: pci@0000:02:00.0 logical name: port-2 version: 03 serial: 00:90:0b:3a:dc:59 capacity: 1Gbit/s width: 32 bits clock: 33MHz capabilities: pm msi msix pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=igb driverversion=5.0.5-k firmware=3.20, 0x80000551 latency=0 link=no multicast=yes port=twisted pair resources: irq:17 memory:dfc00000-dfc7ffff ioport:c000(size=32) memory:dfc80000-dfc83fff *-network:0 description: Ethernet interface product: Ethernet Connection I354 vendor: Intel Corporation physical id: 14 bus info: pci@0000:00:14.0 logical name: port-3 version: 03 serial: 00:90:0b:3a:dc:5a capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi msix pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=igb driverversion=5.0.5-k firmware=0.0.0 latency=0 link=no multicast=yes port=twisted pair resources: irq:20 memory:dfe60000-dfe7ffff ioport:e0c0(size=32) memory:dff2c000-dff2ffff *-network:1 description: Ethernet interface product: Ethernet Connection I354 vendor: Intel Corporation physical id: 14.1 bus info: pci@0000:00:14.1 logical name: port-4 version: 03 serial: 00:90:0b:3a:dc:5b capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi msix pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=igb driverversion=5.0.5-k firmware=0.0.0 latency=0 link=no multicast=yes port=twisted pair resources: irq:21 memory:dfe40000-dfe5ffff ioport:e0a0(size=32) memory:dff28000-dff2bfff *-network:2 description: Ethernet interface product: Ethernet Connection I354 vendor: Intel Corporation physical id: 14.2 bus info: pci@0000:00:14.2 logical name: eth0 version: 03 serial: 00:90:0b:3a:dc:5c size: 1Gbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi msix pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=igb driverversion=5.0.5-k duplex=full firmware=0.0.0 ip=10.5.15.20 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s resources: irq:22 memory:dfe20000-dfe3ffff ioport:e080(size=32) memory:dff24000-dff27fff *-network:3 description: Ethernet interface product: Ethernet Connection I354 vendor: Intel Corporation physical id: 14.3 bus info: pci@0000:00:14.3 logical name: mgmt version: 03 serial: 00:90:0b:3a:dc:5d size: 1Gbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi msix pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=igb driverversion=5.0.5-k duplex=full firmware=0.0.0 ip=10.0.0.253 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s resources: irq:23 memory:dfe00000-dfe1ffff ioport:e060(size=32) memory:dff20000-dff23fff *-network:0 description: Ethernet interface physical id: 1 logical name: pkt0 serial: a2:94:9c:af:16:8e size: 10Mbit/s capabilities: ethernet physical configuration: autonegotiation=off broadcast=yes driver=tun driverversion=1.6 duplex=full link=yes multicast=yes port=twisted pair speed=10Mbit/s *-network:1 description: Ethernet interface physical id: 2 logical name: veth_wan serial: 86:ff:4d:bf:37:e5 capabilities: ethernet physical configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair *-network:2 description: Ethernet interface physical id: 3 logical name: vhost0 serial: 08:00:27:01:02:03 capabilities: ethernet physical configuration: broadcast=yes driver=vrouter driverversion=N/A firmware=N/A ip=172.16.250.1 link=yes multicast=yes *-network:3 description: Ethernet interface physical id: 4 logical name: veth_wan_peer serial: a6:97:51:8e:47:35 capabilities: ethernet physical configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full ip=10.255.255.5 link=yes multicast=yes port=twisted pair So it seems that we had interfaces connected to PCI: port-1:port-4 and eth0/mgmt. Also, it can be good to show driver (for eth0 and ports1-4) root@esehost:/rfshome/eseuser# ethtool -i eth0 driver: igb version: 5.0.5-k firmware-version: 0.0.0 bus-info: 0000:00:14.2 supports-statistics: yes supports-test: yes supports-eeprom-access: yes supports-register-dump: yes supports-priv-flags: no root@esehost:/rfshome/eseuser# ethtool -i port-1 driver: igb version: 5.0.5-k firmware-version: 3.20, 0x80000551 bus-info: 0000:01:00.0 supports-statistics: yes supports-test: yes supports-eeprom-access: yes supports-register-dump: yes supports-priv-flags: no igb driver info: root@esehost:/rfshome/eseuser# modinfo igb filename: /lib/modules/3.13.0-32-generic/kernel/drivers/net/ethernet/intel/igb/igb.ko version: 5.0.5-k license: GPL description: Intel(R) Gigabit Ethernet Network Driver author: Intel Corporation,