Intel 82574L interface wedging - em7.3.2/8.2-STABLE

[hahacc]

Just for guys who may arrive here after searching:
1.there's kernel bug in intel 82574L e1000e driver on centos 6(MSI/MSI-X
interrupts issue), we can resolve this by install kmod-e1000e package from
ELrepo.org and later add pcie_aspm=off e1000e.IntMode=1,1
e1000e.InterruptThrottleRate=10000,10000 acpi=off to kernel parameters. You
can read more info
[URL="http://www.doxer.org/learn-linux/resolved-intel-e1000e-driver-bug-on-82574l-ethernet-controller-causing-network-blipping/"]Intel
e1000e driver bug on 82574L Ethernet controller causing network
blipping[/URL].
2.For the high Tx traffic, this was caused by port 53 dns flooding attack.
I've resolved this by writing some iptable rules. More info here:
[URL="http://www.doxer.org/learn-linux/resolved-port-53-dns-flooding-attack/"]port
53 dns flooding attack[/URL]

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