IPv6 Extensions to the ifconfig Utility (System Administration Guide: IP Services)

System Administration Guide: IP Services

IPv6 Extensions to the `ifconfig` Utility

The ifconfig utility now enables IPv6 interfaces and the tunneling module to be plumbed. The ifconfig(1M) utility uses an extended set of ioctls to configure both IPv4 and IPv6 network interfaces. The following table shows the set of options that are added to this utility. See How to Display Interface Address Assignments for a description of useful diagnostic procedures that use this utility.

Table 16–1 New ifconfig Utility Options


Option	Description
`index`	Set the interface index.
`tsrc`/`tdst`	Set tunnel source or destination.
`addif`	Create the next available logical interface.
`removeif`	Delete a logical interface with a specific IP address.
`destination`	Set the point-to-point destination address for an interface.
`set`	Set an address, netmask, or both for an interface.
`subnet`	Set the subnet address of an interface.
`xmit`/`-xmit`	Enable or disable packet transmission on an interface.

Enabling IPv6 Nodes provides IPv6 configuration procedures.

Examples—New `ifconfig` Utility Options

The following usage of the ifconfig command creates the hme0:3 logical interface to the 1234::5678/64 IPv6 address. This command enables the interface with the up option. The command also reports status. The command disables the interface. Finally, the command deletes the interface.

Example 16–1 Examples—Using `addif` and `removeif`

# ifconfig hme0 inet6 addif 1234::5678/64 up
Created new logical interface hme0:3

# ifconfig hme0:3 inet6
hme0:3: flags=2000841<UP,RUNNING,MULTICAST,IPv6> mtu 1500 index 2
		inet6 1234::5678/64 

# ifconfig hme0:3 inet6 down

# ifconfig hme0 inet6 removeif 1234::5678

The following usage of the ifconfig command opens the device that is associated with the physical interface name. The command configures the streams that are needed for TCP/IP to use the device. The command reports the status of the device. The command configures the source and the destination address for the tunnel. Finally, the command reports the new status of the device after the configuration.

Example 16–2 Examples—Using `tsrc`/`tdst` and `index`

# ifconfig ip.tun0 inet6 plumb index 13

# ifconfig ip.tun0 inet6
ip.tun0: flags=2200850<POINTOPOINT,RUNNING,MULTICAST,NONUD,IPv6> mtu 
1480 index 13
		inet tunnel src 0.0.0.0 
		inet6 fe80::/10 --> :: 

# ifconfig ip.tun0 inet6 tsrc 120.46.86.158 tdst 120.46.86.122

# ifconfig ip.tun0 inet6
ip.tun0: flags=2200850<POINTOPOINT,RUNNING,MULTICAST,NONUD,IPv6> mtu 
1480 index 13
		inet tunnel src 120.46.86.158  tunnel dst 120.46.86.122
		inet6 fe80::8192:569e/10 --> fe80::8192:567a