ethtool 是用于查询及设置网卡参数的命令。
Ethtool is the command for searching and setting network card parameters.
使用概要：
Summary of use of :
ethtool ethx //查询ethx网口基本设置，其中 x 是对应网卡的编号，如eth0、eth1等等
ethtool ethx & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; / Query ethx net base settings where x is the number of the corresponding net cards, e.g. eth0, eth1, etc.
ethtool –h //显示ethtool的命令帮助(help)
ethtool & ndash; h & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & & nbsp; / Show ethtool's command help (help)
ethtool –i ethX //查询ethX网口的相关信息
ethtool & ndash; i ethX& nbsp; & nbsp; & nbsp; / query relevant information on the ethX portal & nbsp;
ethtool –d ethX //查询ethX网口注册性信息
ethtool & ndash; dethX & nbsp; & nbsp; / / Query for registration information on the ethX portal
ethtool –r ethX //重置ethX网口到自适应模式
ethtool & ndash; r ethX& nbsp; & nbsp; & nbsp; / ResetethX to self-adaptation mode
ethtool –S ethX //查询ethX网口收发包统计
ethtool & ndash; S ethX& nbsp; & nbsp; & nbsp; / / Query ethX web portal dispatch statistics
ethtool –s ethX [speed 10|100|1000] [duplex half|full] [autoneg on|off] //设置网口速率10/100/1000M、设置网口半/全双工、设置网口是否自协商
ethtool & ndash; s ethX [speed 101001000] [duplex half full] & nbsp; & nbsp; [autoneg on off] & nbsp; & nbsp; & nbsp; & / / set a net port rate of 10/100/1000M, set a web portal half/full-time, set a web portal to consult themselves
使用举例：
Use examples:
1）[root@linux /]# ethtool eth1
Settings for eth1:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: umbg
Wake-on: d
Link detected: yes
2）[root@linux /]# ethtool -i eth1
driver: e1000
version: 5.0.43-k1
firmware-version: N/A
bus-info: 06:08.1
3）[root@linux /]# ethtool -S eth1
NIC statistics:
rx_packets: 58068300
tx_packets: 87124083
rx_bytes: 1589713008
tx_bytes: 2165825901
rx_errors: 0
tx_errors: 0
rx_dropped: 0
tx_dropped: 0
multicast: 0
collisions: 0
rx_length_errors: 0
rx_over_errors: 0
rx_crc_errors: 0
rx_frame_errors: 0
rx_fifo_errors: 0
rx_missed_errors: 0
tx_aborted_errors: 0
tx_carrier_errors: 0
tx_fifo_errors: 0
tx_heartbeat_errors: 0
tx_window_errors: 0
4）[root@linux /]# ethtool -s eth1 autoneg off speed 100 duplex full
相关参考：
references:
1）[root@linux /]# which ethtool //查询 ethtool 存放的路径
1) [root@linux /]# which etool & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; / query the path of the ethtool repository
/sbin/ethtool
2）[root@linux /]# rpm -qf /sbin/ethtool //查询 ethtool 的版本信息
2) [root@linux /]#rpm -qf /sbin/ethtool / query ethtool version information
ethtool-1.6-5
3）将 ethtool 设置永久保存在网络设备的方法
3) Setup ethtool for permanent storage in network devices
解决方法一:
Solution one:
ethtool 设置可通过 /etc/sysconfig/network-scripts/ifcfg-ethX 文件保存，从而在设备下次启动时激活选项。
The ethtool settings can be saved by /etc/sysconfig/networks-scripts/ifcfg-ethX files so that the option can be activated at the next start of the device. & nbsp;
例如：ethtool -s eth0 speed 100 duplex full autoneg off
For example: ethtool-sethopeed 100 duplex full autoneg off
此指令将eth0设备设置为全双工自适应，速度为100Mbs。若要eth0启动时设置这些参数, 修改文件/etc/sysconfig/network-scripts/ifcfg-eth0 ，添加如下一行:
This instruction sets the eth0 device to self-adapt at 100 mbs. If you want to set these parameters when eth0 starts, modify the file/etc/sysconfig/network-scripts/ifcfg-eth0 and add the following row:
ETHTOOL_OPTS="speed 100 duplex full autoneg off"
解决方法二:
Solution two:
将ethtool设置写入/etc/rc.d/rc.local之中。
Writes the ethtool settings to /etc/rc.d/rc.local.
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