Ubuntu Manpage: ip-address - protocol address management

Provided by: iproute2_5.15.0-1ubuntu2_amd64

NAME

       ip-address - protocol address management

SYNOPSIS

       ip [ OPTIONS ] address  { COMMAND | help }

       ip address { add | change | replace } IFADDR dev IFNAME [ LIFETIME ] [ CONFFLAG-LIST ]

       ip address del IFADDR dev IFNAME [ mngtmpaddr ]

       ip address { save | flush } [ dev IFNAME ] [ scope SCOPE-ID ] [ metric METRIC ] [ to
               PREFIX ] [ FLAG-LIST ] [ label PATTERN ] [ up ]

       ip address [ show [ dev IFNAME ] [ scope SCOPE-ID ] [ to PREFIX ] [ FLAG-LIST ] [ label
               PATTERN ] [ master DEVICE ] [ type TYPE ] [ vrf NAME ] [ up ] ]

       ip address { showdump | restore }

       IFADDR := PREFIX | ADDR peer PREFIX [ broadcast ADDR ] [ anycast ADDR ] [ label LABEL ] [
               scope SCOPE-ID ]

       SCOPE-ID := [ host | link | global | NUMBER ]

       FLAG-LIST := [ FLAG-LIST ] FLAG

       FLAG := [ [-]permanent | [-]dynamic | [-]secondary | [-]primary | [-]tentative |
               [-]deprecated | [-]dadfailed | [-]temporary | CONFFLAG-LIST ]

       CONFFLAG-LIST := [ CONFFLAG-LIST ] CONFFLAG

       CONFFLAG := [ home | mngtmpaddr | nodad | optimstic | noprefixroute | autojoin ]

       LIFETIME := [ valid_lft LFT ] [ preferred_lft LFT ]

       LFT := [ forever | SECONDS ]

       TYPE := [ bridge | bridge_slave | bond | bond_slave | can | dummy | hsr | ifb | ipoib |
               macvlan | macvtap | vcan | veth | vlan | vxlan | ip6tnl | ipip | sit | gre |
               gretap | erspan | ip6gre | ip6gretap | ip6erspan | vti | vrf | nlmon | ipvlan |
               lowpan | geneve | macsec ]

DESCRIPTION

The address is a protocol (IPv4 or IPv6) address attached to a network device. Each device
must have at least one address to use the corresponding protocol. It is possible to have
several different addresses attached to one device. These addresses are not discriminated,
so that the term alias is not quite appropriate for them and we do not use it in this
document.

The ip address command displays addresses and their properties, adds new addresses and
deletes old ones.

ip address add - add new protocol address.
dev IFNAME
the name of the device to add the address to.

local ADDRESS (default)
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.

peer ADDRESS
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.

broadcast ADDRESS
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.

label LABEL
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.

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

global - the address is globally valid.

site - (IPv6 only, deprecated) the address is site local, i.e. it is valid
inside this site.

link - the address is link local, i.e. it is valid only on this device.

host - the address is valid only inside this host.

metric NUMBER
priority of prefix route associated with address.

valid_lft LFT
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.

preferred_lft LFT
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.

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

mngtmpaddr
(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.

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

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

noprefixroute
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.

autojoin
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.

ip address delete - delete protocol address
Arguments: coincide with the arguments of ip addr add. The device name is a required
argument. The rest are optional. If no arguments are given, the first address is deleted.

ip address show - look at protocol addresses
dev IFNAME (default)
name of device.

scope SCOPE_VAL
only list addresses with this scope.

to PREFIX
only list addresses matching this prefix.

label PATTERN
only list addresses with labels matching the PATTERN. PATTERN is a usual shell
style pattern.

master DEVICE
only list interfaces enslaved to this master device.

vrf NAME
only list interfaces enslaved to this vrf.

type TYPE
only list interfaces of the given type.

Note that the type name is not checked against the list of supported types -
instead it is sent as-is to the kernel. Later it is used to filter the returned
interface list by comparing it with the relevant attribute in case the kernel
didn't filter already. Therefore any string is accepted, but may lead to empty
output.

up only list running interfaces.

dynamic and permanent
(IPv6 only) only list addresses installed due to stateless address configuration or
only list permanent (not dynamic) addresses. These two flags are inverses of each
other, so -dynamic is equal to permanent and -permanent is equal to dynamic.

tentative
(IPv6 only) only list addresses which have not yet passed duplicate address
detection.

-tentative
(IPv6 only) only list addresses which are not in the process of duplicate address
detection currently.

deprecated
(IPv6 only) only list deprecated addresses.

-deprecated
(IPv6 only) only list addresses not being deprecated.

dadfailed
(IPv6 only) only list addresses which have failed duplicate address detection.

-dadfailed
(IPv6 only) only list addresses which have not failed duplicate address detection.

temporary or secondary
List temporary IPv6 or secondary IPv4 addresses only. The Linux kernel shares a
single bit for those, so they are actually aliases for each other although the
meaning differs depending on address family.

-temporary or -secondary
These flags are aliases for primary.

primary
List only primary addresses, in IPv6 exclude temporary ones. This flag is the
inverse of temporary and secondary.

-primary
This is an alias for temporary or secondary.

ip address flush - flush protocol addresses
This command flushes the protocol addresses selected by some criteria.

This command has the same arguments as show except that type and master selectors are not
supported. Another difference is that it does not run when no arguments are given.

Warning: This command and other flush commands are unforgiving. They will cruelly purge
all the addresses.

With the -statistics option, the command becomes verbose. It prints out the number of
deleted addresses and the number of rounds made to flush the address list. If this option
is given twice, ip address flush also dumps all the deleted addresses in the format
described in the previous subsection.

EXAMPLES

       ip address show
           Shows IPv4 and IPv6 addresses assigned to all network interfaces. The 'show'
           subcommand can be omitted.

       ip address show up
           Same as above except that only addresses assigned to active network interfaces are
           shown.

       ip address show dev eth0
           Shows IPv4 and IPv6 addresses assigned to network interface eth0.

       ip address add 2001:0db8:85a3::0370:7334/64 dev eth1
           Adds an IPv6 address to network interface eth1.

       ip address delete 2001:0db8:85a3::0370:7334/64 dev eth1
           Delete the IPv6 address added above.

       ip address flush dev eth4 scope global
           Removes all global IPv4 and IPv6 addresses from device eth4. Without 'scope global' it
           would remove all addresses including IPv6 link-local ones.

AUTHOR

       Original Manpage by Michail Litvak <mci@owl.openwall.com>

NAME

SYNOPSIS

DESCRIPTION

EXAMPLES

SEE ALSO

AUTHOR