系统：CentOS 5.5 X86_64、RHEL 5.6 X86_64
硬件：Dell R610、R710、R720
通过升级系统自带网卡驱动程序到最新版本，可以解决当网卡流量过大时，出现掉包、断网现象。
升级步骤：
1.查看当前网卡类型
# /sbin/lspci |grep Ethernet
02:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
02:00.1 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
03:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
03:00.1 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
2.查看网卡驱动模块
# cat /etc/modprobe.conf|grep eth
alias eth0 bnx2 #-->网卡模块为bnx2
alias eth1 bnx2
alias eth2 bnx2
alias eth3 bnx2
# ethtool -i em1
driver: e1000e
version: 2.3.2-NAPI
firmware-version: 0.13-4
bus-info: 0000:00:19.0
3.查看网卡驱动当前版本
# modinfo bnx2
filename: /lib/modules/2.6.18-238.el5/kernel/drivers/net/bnx2.ko
version: 2.0.8-rh #--> 现有驱动的版本
license: GPL
description: Broadcom NetXtreme II BCM5706/5708/5709/5716 Driver #--> 网卡型号
author: Michael Chan <mchan@broadcom.com>
srcversion: C7F6CA68A2BE2D1974E1D05
alias: pci:v000014E4d0000163Csv*sd*bc*sc*i*
alias: pci:v000014E4d0000163Bsv*sd*bc*sc*i*
alias: pci:v000014E4d0000163Asv*sd*bc*sc*i*
alias: pci:v000014E4d00001639sv*sd*bc*sc*i*
alias: pci:v000014E4d000016ACsv*sd*bc*sc*i*
alias: pci:v000014E4d000016AAsv*sd*bc*sc*i*
alias: pci:v000014E4d000016AAsv0000103Csd00003102bc*sc*i*
alias: pci:v000014E4d0000164Csv*sd*bc*sc*i*
alias: pci:v000014E4d0000164Asv*sd*bc*sc*i*
alias: pci:v000014E4d0000164Asv0000103Csd00003106bc*sc*i*
alias: pci:v000014E4d0000164Asv0000103Csd00003101bc*sc*i*
depends:
vermagic: 2.6.18-238.el5 SMP mod_unload gcc-4.1
parm: disable_msi:Disable Message Signaled Interrupt (MSI) (int)
parm: enable_entropy:Allow bnx2 to populate the /dev/random entropy pool (int)
module_sig: 883f3504de5f22f43e909ab54b946c11240a909e2fda20a05b43ed30218e26f5efa0af241d6e29a009f45d50b4ccf2c77c0819974b1d3f8f51fca9be2
4.下载最新网卡驱动程序
到以下链接，根据查询到的网卡型号下载最新的驱动程序：
5.驱动程序安装
unzip linux-7.2.20.zip
cd Server/Linux/Driver/
rpm -ivh netxtreme2-7.2.20-1.src.rpm
cd /usr/src/redhat/SPECS/
rpmbuild -bb netxtreme2.spec
cd ../RPMS/x86_64/
rpm -ivh netxtreme2-7.2.20-1.x86_64.rpm
6.加载最新驱动模块
#vi change.sh
rmmod bnx2
modprobe bnx2
执行脚本：
sh change.sh
7.查看最新驱动版本
#modinfo bnx2
filename: /lib/modules/2.6.18-238.el5/updates/bnx2.ko
version: 2.2.1j #--> 新版驱动程序版本号
license: GPL
description: Broadcom NetXtreme II BCM5706/5708/5709/5716 Driver
author: Michael Chan <mchan@broadcom.com>
srcversion: 92BB1824D1695C4AE860E5F
alias: pci:v000014E4d0000163Csv*sd*bc*sc*i*
alias: pci:v000014E4d0000163Bsv*sd*bc*sc*i*
alias: pci:v000014E4d0000163Asv*sd*bc*sc*i*
alias: pci:v000014E4d00001639sv*sd*bc*sc*i*
alias: pci:v000014E4d000016ACsv*sd*bc*sc*i*
alias: pci:v000014E4d000016AAsv*sd*bc*sc*i*
alias: pci:v000014E4d000016AAsv0000103Csd00003102bc*sc*i*
alias: pci:v000014E4d0000164Csv*sd*bc*sc*i*
alias: pci:v000014E4d0000164Asv*sd*bc*sc*i*
alias: pci:v000014E4d0000164Asv0000103Csd00003106bc*sc*i*
alias: pci:v000014E4d0000164Asv0000103Csd00003101bc*sc*i*
depends:
vermagic: 2.6.18-238.el5 SMP mod_unload gcc-4.1
parm: disable_msi:Disable Message Signaled Interrupt (MSI) (int)
parm: stop_on_tx_timeout:For debugging purposes, prevent a chip reset when a tx timeout occurs (int)
如果没有成功，重新启动下服务器；
8.卸载最新驱动，还原到以前的驱动
如果安装的最新驱动程序有问题，怎么卸载？
#rpm -e netxtreme2-7.2.20-1