phpman > man > ip-address(8)

IP-ADDRESS(8)                                   Linux                                  IP-ADDRESS(8)



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 PAT‐
               TERN ] [ 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 | [-]depre‐‐
               cated | [-]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 | gen‐‐
               eve | 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 sev‐
       eral 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 ad‐
              dress. 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 in‐
                      side 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 ex‐
              pires, the address is no longer used for new outgoing connections. Defaults to for‐‐
              ever.


       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 tem‐
              plate 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 ad‐
              dress 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 ac‐
              tive.


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


       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 con‐
              nected to an Ethernet switch that does IGMP snooping since the switch would not repli‐
              cate multicast packets on ports that did not have IGMP reports for the multicast ad‐
              dresses.

              Linux VXLAN interfaces created via ip link add vxlan have the group option that en‐
              ables 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 argu‐
       ment. 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 de‐
              tection 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 dif‐
              fers 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.


SEE ALSO
       ip(8)


AUTHOR
       Original Manpage by Michail Litvak <mci AT owl.com>



iproute2                                     20 Dec 2011                               IP-ADDRESS(8)