Difference between revisions of "Ethtool"

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(New page: '''ethtool''' is a Linux command for displaying or modifying the Network Interface Controller (NIC) parameters. ==Usage== The command is useful for: * Identification and diagnosis of ...)
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Revision as of 17:35, 3 January 2014

ethtool is a Linux command for displaying or modifying the Network Interface Controller (NIC) parameters.

Usage

The command is useful for:

  • Identification and diagnosis of Ethernet devices
  • Extended Ethernet devices statistics
  • Control speed, duplex, auto-negotiation and flow control for Ethernet devices
  • Control checksum offload and other hardware offload features
  • Control digital media adapter (DMA) ring sizes and interrupt moderation
  • Control receive queue selection for multi-queue devices
  • Upgrade firmware in flash memory

Example

  • Display the current parameters for your eth0 device:
$ ethtool eth0
Settings for eth0:
	Supported ports: [ TP ]
	Supported link modes:   10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Full 
	Supported pause frame use: No
	Supports auto-negotiation: Yes
	Advertised link modes:  10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Full 
	Advertised pause frame use: No
	Advertised auto-negotiation: Yes
	Speed: 1000Mb/s
	Duplex: Full
	Port: Twisted Pair
	PHYAD: 2
	Transceiver: internal
	Auto-negotiation: on
	MDI-X: on
Cannot get wake-on-lan settings: Operation not permitted
	Current message level: 0x00000007 (7)
			       drv probe link
	Link detected: yes
  • Display Ethernet driver settings:
$ ethtool -i eth0
driver: e1000e
version: 2.1.4-k
firmware-version: 0.13-3
bus-info: 0000:00:19.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: no
  • Make your NIC blink for the physical port using eth0:
$ ethtool -p eth0

This is useful if your ethernet adapter has multiple ports and you are not sure which one has been assigned to eth0.

See also

  • arp
  • hostname
  • ifconfig
  • netstat
  • rarp
  • route
  • plipconfig
  • slattach
  • mii-tool — a CLI command allowing to modify the Network Interface Controller (NIC) parameters. Part of the "net-tools" project.
  • iptunnel
  • ipmaddr

References