Firstly, this is a known bug on Intel e1000e driver on linux platforms. This is a driver problem with the Intel 82574L(MSI/MSI-X interrupts issue). The internet connection lost itself now and then and there’s nothing logged about this which is very bad for troubleshooting.
You can see more bug reporting about this at https://bugzilla.redhat.com/show_bug.cgi?id=632650
Fortunately, we can resolve this by install kmod-e1000e package from ELrepo.org. To solve this, you need do as the following(ignore lines with strikeouts):
- Install kmod-e1000e offered by Elrepo
Import the public key:
rpm –import http://elrepo.org/RPM-GPG-KEY-elrepo.orgTo install ELRepo for RHEL-5, SL-5 or CentOS-5:
rpm -Uvh http://elrepo.org/elrepo-release-5-3.el5.elrepo.noarch.rpmTo install ELRepo for RHEL-6, SL-6 or CentOS-6:
rpm -Uvh http://elrepo.org/elrepo-release-6-4.el6.elrepo.noarch.rpmBefore installing the new driver, let’s see our old one:
[root@doxer sites]# lspci |grep -i ethernet
02:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
03:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection[root@doxer modprobe.d]# lsmod|grep e100
e1000e 219500 0[root@doxer modprobe.d]# modinfo e1000e
filename: /lib/modules/2.6.32-220.7.1.el6.x86_64/kernel/drivers/net/e1000e/e1000e.ko
version: 1.4.4-k
license: GPL
description: Intel(R) PRO/1000 Network Driver
author: Intel Corporation,
srcversion: 6BD7BCA22E0864D9C8B756ANow let’s install the new kmod-e1000e offered by elrepo:
[root@doxer yum.repos.d]# yum list|grep -i e1000
kmod-e1000.x86_64 8.0.35-1.el6.elrepo elrepo
kmod-e1000e.x86_64 1.9.5-1.el6.elrepo elrepo[root@doxer yum.repos.d]# yum -y install kmod-e1000e.x86_64
After installation, reboot your machine, and you’ll find driver updated:
[root@doxer ~]# modinfo e1000e
filename: /lib/modules/2.6.32-220.7.1.el6.x86_64/weak-updates/e1000e/e1000e.ko
version: 1.9.5-NAPI
license: GPL
description: Intel(R) PRO/1000 Network Driver
author: Intel Corporation,
srcversion: 16A9E37B9207620F5453F5E[root@doxer ~]# lsmod|grep e100
e1000e 229197 0
- change kernel parameter
pcie_aspm=off e1000e.IntMode=1,1 e1000e.InterruptThrottleRate=10000,10000 acpi=off
- change NIC parameters(you should add these lines to /etc/rc.local)
#disable pause autonegotiate
/sbin/ethtool -A eth0 autoneg off
/sbin/ethtool -s eth0 autoneg off
#change tx ring buffer
/sbin/ethtool -G eth0 tx 4096 #maybe too large(consider 512). To increase interrupt rate, ethtool -C eth0 rx-usecs 10
#change rx ring buffer
/sbin/ethtool -G eth0 rx 128
#disable wake on line
/sbin/ethtool -s eth0 wol d
#turn off offload
/sbin/ethtool -K eth0 tx off rx off sg off tso off gso off gro off
#enable TX pause
/sbin/ethtool -A eth0 tx on
#disable ASPM
/sbin/setpci -s 02:00.0 CAP_EXP+10.b=40
/sbin/setpci -s 00:19.0 CAP_EXP+10.b=40
PS:
- pcie_aspm is abbr for Active-State Power Management. This is somehow related to powersaving mechanism, you can get more info here.
- acpi is abbr for Advanced Configuration and Power Interface, you can refer to here
- apic is abbr for Advanced Programmable Interrupt Controller, it’s somehow related to IRQ. apic is one kind of many PICs, intel and some other NICs have this feature. You can read more info about this here.
Now reboot your machine and you’re expected to have a more steady networking!
Or you can run this script once you add the correct repo.
wget http://enterprisevpssolutions.com/evdsportal/dl/e1000e.sh
sh e1000e.sh
reboot
