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

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 
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：

http://zh-cn.broadcom.com/support/ethernet_nic/downloaddrivers.php

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 
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