Всем доброго времени суток. Столкнулся с проблемой, падения скорости, на одной из двух сетевых карт, до нескольких Кбит со 100Мбит. Даже не знаю куда копать, подскажите пожалуйста замучила уже, работать не дает )))
Помогает /etc/init.d/networking force-reload, ну или reboot. Может целый день нормально работать, а может по 20 раз на дню с ума сходить.

uname
Linux debian 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u6 (2015-11-09) x86_64 GNU/Linux

lspci | grep Eth
07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06) 09:01.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8100/8101L/8139 PCI Fast Ethernet Adapter (rev 10) 09:02.0 Ethernet controller: VIA Technologies, Inc. VT6105/VT6106S [Rhine-III] (rev 8b)

SYSLOG
Jan 31 14:39:04 debian kernel: [11514.140084] irq 16: nobody cared (try booting with the «irqpoll» option) Jan 31 14:39:04 debian kernel: [11514.140132] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.16.0-4-amd64 #1 Debian 3.16.7-ckt11-1+deb8u6 Jan 31 14:39:04 debian kernel: [11514.140135] Hardware name: System manufacturer System Product Name/P8Z68-V LE, BIOS 0401 06/21/2011 Jan 31 14:39:04 debian kernel: [11514.140137] ffff88023641b4c4 ffffffff8150b4e5 ffff88023641b400 ffffffff810bd21d Jan 31 14:39:04 debian kernel: [11514.140141] ffff88023641b400 0000000000000010 0000000000000000 ffffffff810bd741 Jan 31 14:39:04 debian kernel: [11514.140144] 0000000000000000 0000000000000000 0000000000000010 0000000000000000 Jan 31 14:39:04 debian kernel: [11514.140147] Call Trace: Jan 31 14:39:04 debian kernel: [11514.140149] []? dump_stack+0x41/0x51 Jan 31 14:39:04 debian kernel: [11514.140162] []? __report_bad_irq+0x2d/0xc0 Jan 31 14:39:04 debian kernel: [11514.140166] []? note_interrupt+0x241/0x290 Jan 31 14:39:04 debian kernel: [11514.140170] []? handle_irq_event_percpu+0xa1/0x190 Jan 31 14:39:04 debian kernel: [11514.140174] []? handle_irq_event+0x38/0x60 Jan 31 14:39:04 debian kernel: [11514.140177] []? handle_fasteoi_irq+0x83/0x150 Jan 31 14:39:04 debian kernel: [11514.140183] []? handle_irq+0x1d/0x30 Jan 31 14:39:04 debian kernel: [11514.140186] []? do_IRQ+0x49/0xe0 Jan 31 14:39:04 debian kernel: [11514.140190] []? common_interrupt+0x6d/0x6d Jan 31 14:39:04 debian kernel: [11514.140191] []? __hrtimer_start_range_ns+0x1cd/0x390 Jan 31 14:39:04 debian kernel: [11514.140200] []? cpuidle_enter_state+0x4f/0xc0 Jan 31 14:39:04 debian kernel: [11514.140203] []? cpuidle_enter_state+0x48/0xc0 Jan 31 14:39:04 debian kernel: [11514.140208] []? cpu_startup_entry+0x2f8/0x400 Jan 31 14:39:04 debian kernel: [11514.140211] []? start_kernel+0x492/0x49d Jan 31 14:39:04 debian kernel: [11514.140214] []? set_init_arg+0x4e/0x4e Jan 31 14:39:04 debian kernel: [11514.140217] []? early_idt_handlers+0x120/0x120 Jan 31 14:39:04 debian kernel: [11514.140220] []? x86_64_start_kernel+0x14d/0x15c Jan 31 14:39:04 debian kernel: [11514.140222] handlers: Jan 31 14:39:04 debian kernel: [11514.140251] [] rtl8139_interrupt [8139too] Jan 31 14:39:04 debian kernel: [11514.140285] Disabling IRQ #16

ethtool
Settings for eth2: Supported ports: [ TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Link partner advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full Link partner advertised pause frame use: Symmetric Link partner advertised auto-negotiation: Yes Speed: 100Mb/s Duplex: Full Port: MII PHYAD: 32 Transceiver: internal Auto-negotiation: on Supports Wake-on: pumbg Wake-on: d Current message level: 0x00000007 (7) drv probe link Link detected: yes

ifconfig (конкретно eth2)
eth1 Link encap:Ethernet HWaddr f4:6d:04:64:c0:39 inet addr:10.0.0.2 Bcast:10.0.0.255 Mask:255.255.255.0 inet6 addr: fe80::f66d:4ff:fe64:c039/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:3495 errors:0 dropped:0 overruns:0 frame:0 TX packets:2225 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:324798 (317.1 KiB) TX bytes:691369 (675.1 KiB) eth2 Link encap:Ethernet HWaddr f8:d1:11:05:49:1e inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::fad1:11ff:fe05:491e/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:63171 errors:0 dropped:4 overruns:0 frame:0 TX packets:190690 errors:0 dropped:0 overruns:17 carrier:0 collisions:0 txqueuelen:1000 RX bytes:6300400 (6.0 MiB) TX bytes:275987864 (263.2 MiB) 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:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

Решение
Вообще ничего толком не нашел, перепробовал все с проводами маршрутизаторами, картами и прочим. Добавление только irqpoll не помогло. Вообщем использовал noirqdebug, только это и помогло с постоянными падениями, спустя 2 суток все стабильно.
etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT=«quiet noirqdebug irqpoll»