[CentOS] Loss of network connectivity | kernel: irq 68: nobody cared (try booting with the "irqpoll" option)

Greetings all,

Running CentOS 6.5 x86_64 2.6.32-431.5.1.el6.x86_64.
(already booting with the irqpoll option in grub)

Every few months I lose network connectivity and have to restart the server:

in /var/log/messages:

"
Mar  7 18:54:21 backup03 kernel: irq 68: nobody cared (try booting with the
"irqpoll" option)
Mar  7 18:54:21 backup03 kernel: Pid: 0, comm: swapper Not tainted
2.6.32-431.1.2.0.1.el6.x86_64 #1
Mar  7 18:54:21 backup03 kernel: Call Trace:
Mar  7 18:54:21 backup03 kernel: <IRQ>  [<ffffffff810e8ffb>] ?
__report_bad_irq+0x2b/0xa0
Mar  7 18:54:21 backup03 kernel: [<ffffffff810e91fc>] ?
note_interrupt+0x18c/0x1d0
Mar  7 18:54:21 backup03 kernel: [<ffffffff810e9845>] ?
handle_edge_irq+0xf5/0x180
Mar  7 18:54:21 backup03 kernel: [<ffffffff8100faf9>] ? handle_irq+0x49/0xa0
Mar  7 18:54:21 backup03 kernel: [<ffffffff81530fec>] ? do_IRQ+0x6c/0xf0
Mar  7 18:54:21 backup03 kernel: [<ffffffff8100b9d3>] ?
ret_from_intr+0x0/0x11
Mar  7 18:54:21 backup03 kernel: [<ffffffff8107a893>] ?
__do_softirq+0x73/0x1e0
Mar  7 18:54:21 backup03 kernel: [<ffffffff810ac9da>] ?
tick_program_event+0x2a/0x30
Mar  7 18:54:21 backup03 kernel: [<ffffffff8100c30c>] ?
call_softirq+0x1c/0x30
Mar  7 18:54:21 backup03 kernel: [<ffffffff8100fa75>] ? do_softirq+0x65/0xa0
Mar  7 18:54:21 backup03 kernel: [<ffffffff8107a795>] ? irq_exit+0x85/0x90
Mar  7 18:54:21 backup03 kernel: [<ffffffff815310ba>] ?
smp_apic_timer_interrupt+0x4a/0x60
Mar  7 18:54:21 backup03 kernel: [<ffffffff8100bb93>] ?
apic_timer_interrupt+0x13/0x20
Mar  7 18:54:21 backup03 kernel: <EOI>  [<ffffffff812e09ce>] ?
intel_idle+0xde/0x170
Mar  7 18:54:21 backup03 kernel: [<ffffffff812e09b1>] ?
intel_idle+0xc1/0x170
Mar  7 18:54:21 backup03 kernel: [<ffffffff81426707>] ?
cpuidle_idle_call+0xa7/0x140
Mar  7 18:54:21 backup03 kernel: [<ffffffff81009fc6>] ? cpu_idle+0xb6/0x110
Mar  7 18:54:21 backup03 kernel: [<ffffffff81520e2c>] ?
start_secondary+0x2ac/0x2ef
Mar  7 18:54:21 backup03 kernel: handlers:
Mar  7 18:54:21 backup03 kernel: [<ffffffffa015f260>]
(e1000_msix_other+0x0/0x1f0 [e1000e])
Mar  7 18:54:21 backup03 kernel: Disabling IRQ #68
"

cat /proc/interrupts | grep 68
  68:          2          0          0          0  IR-PCI-MSI-edge      eth0

I'm already booting with irqpoll set in grub:

kernel /vmlinuz-2.6.32-431.5.1.el6.x86_64 ro
root=UUID=b535f362-3152-4cc1-a9f2-b86f44331510 nomodeset rd_NO_LUKS
 KEYBOARDTYPE=pc KEYTABLE=us LANG=en_US.UTF-8 rd_NO_MD quiet
SYSFONT=latarcyrheb-sun16 rhgb crashkernel=auto rd_NO_LVM rd_NO_DM irqpoll

Anyone have any ideas or suggestions? Not sure what else I can do here.

Thanks in advance!

-PJF