Use of the Ifconfig command

Configure and view network interface conditions using the Ifconfig command

Example 1: Configure eth0 IP and activate the device at the same time:

# ifconfig eth0 192.168.4.1 netmask 255.255.255.0 up

Example 2: Configure IP for the eth0 alias device eth0:1 and add routes

# ifconfig Eth0:1 192.168.4.2

# route add–host 192.168.4.2 Dev eth0:1

Example 3: Activating (disabling) a device

# ifconfig eth0:1 up (down)

Example 4: View all (specified) network interface configurations

# ifconfig (eth0)

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Function Description: Displays or sets the network device.

Syntax: ifconfig [network device][down up-allmulti-arp-promisc][add< address >][del< address >][
Supplemental Note: Ifconfig can set the status of a network device, or display the current settings.

Parameters

add< address > Set the IP address of the network device IPV6.

del< address > Remove the IP address of the network device IPV6.

Down closes the specified network device.


IO_ADDR&LT;I/O address > Set the I/O address of the network device.

IRQ&LT;IRQ address > Set IRQ for network devices.

media< network Media type > Set the media type of the network device.

mem_start< memory address > Set the starting address that the network device occupies in the main memory.

Number of metric< > Specifies the number to be added when calculating the number of packets transferred.

mtu< bytes > Sets the MTU of the network device.

netmask< Subnet mask > Set subnet mask for network devices.

tunnel< address > Establish a tunnel communication address between IPV4 and IPV6.

Up starts the specified network device.

-broadcast< address > Packets that will be sent to the specified address are treated as broadcast packets.

-pointopoint< address > establishes a direct connection with the network device at the specified address, which has a confidential function.

-promisc to turn off or start the promiscuous mode for the specified network device.

[IP Address] Specifies the IP address of the network device.

[Network Device] Specifies the name of the network device.