Interface AddressAddOptions

TODO: Missing from manpage.

Joining multicast groups on Ethernet level via ip maddr command does not work if connected to an Ethernet switch that does IGMP snooping since the switch would not replicate multicast packets on ports that did not have IGMP reports for the multicast addresses.

Linux VXLAN interfaces created via ip link add vxlan have the group option that enables them to do the required join.

Using the autojoin flag when adding a multicast address enables similar functionality for Openvswitch VXLAN interfaces as well as other tunneling mechanisms that need to receive multicast traffic.

The broadcast address on the interface.

It is possible to use the special symbols '+' and '-' instead of the broadcast address. In this case, the broadcast address is derived by setting/resetting the host bits of the interface prefix.

The name of the device to add the address to.

(IPv6 only) designates this address the "home address" as defined in RFC 6275.

Each address may be tagged with a label string. In order to preserve compatibility with Linux-2.0 net aliases, this string must coincide with the name of the device or must be prefixed with the device name followed by colon. The maximum allowed total length of label is 15 characters.

The address of the interface. The format of the address depends on the protocol.

It is a dotted quad for IP and a sequence of hexadecimal halfwords separated by colons for IPv6. The ADDRESS may be followed by a slash and a decimal number which encodes the network prefix length.

(IPv6 only) make the kernel manage temporary addresses created from this one as template on behalf of Privacy Extensions (RFC3041).

For this to become active, the use_tempaddr sysctl setting has to be set to a value greater than zero. The given address needs to have a prefix length of 64.

This flag allows to use privacy extensions in a manually configured network, just like if stateless auto-configuration was active.

(IPv6 only) do not perform Duplicate Address Detection (RFC 4862) when adding this address.

Do not automatically create a route for the network prefix of the added address, and don't search for one to delete when removing the address.

Changing an address to add this flag will remove the automatically added prefix route, changing it to remove this flag will create the prefix route automatically.

(IPv6 only) When performing Duplicate Address Detection, use the RFC 4429 optimistic variant.

The address of the remote endpoint for pointopoint interfaces.

Again, the ADDRESS may be followed by a slash and a decimal number, encoding the network prefix length. If a peer address is specified, the local address cannot have a prefix length. The network prefix is associated with the peer rather than with the local address.

The preferred lifetime of this address; see section 5.5.4 of RFC 4862. When it expires, the address is no longer used for new outgoing connections. Defaults to forever.

The scope of the area where this address is valid. The available scopes are listed in file /etc/iproute2/rt_scopes.

The valid lifetime of this address; see section 5.5.4 of RFC 4862. When it expires, the address is removed by the kernel. Defaults to forever.