ip

IP(8)                                Linux                               IP(8)

NAME
       ip - show / manipulate routing, network devices, interfaces and tunnels

SYNOPSIS
       ip [ OPTIONS ] OBJECT { COMMAND | help }

       ip [ -force ] -batch filename

       OBJECT := { link | address | addrlabel | route | rule | neigh | ntable
               | tunnel | tuntap | maddress | mroute | mrule | monitor | xfrm
               | netns | l2tp | tcp_metrics | token | macsec }

       OPTIONS := { -V[ersion] | -h[uman-readable] | -s[tatistics] |
               -d[etails] | -r[esolve] | -iec | -f[amily] { inet | inet6 |
               link } | -4 | -6 | -I | -D | -B | -0 | -l[oops] { maximum-addr-
               flush-attempts } | -o[neline] | -rc[vbuf] [size] | -t[imestamp]
               | -ts[hort] | -n[etns] name | -N[umeric] | -a[ll] | -c[olor] |
               -br[ief] | -j[son] | -p[retty] }

OPTIONS
       -V, -Version
              Print the version of the ip utility and exit.

       -h, -human, -human-readable
              output statistics with human readable values followed by suffix.

       -b, -batch <FILENAME>
              Read commands from provided file or standard input and invoke
              them.  First failure will cause termination of ip.

       -force Don't terminate ip on errors in batch mode.  If there were any
              errors during execution of the commands, the application return
              code will be non zero.

       -s, -stats, -statistics
              Output more information. If the option appears twice or more,
              the amount of information increases.  As a rule, the information
              is statistics or some time values.

       -d, -details
              Output more detailed information.

       -l, -loops <COUNT>
              Specify maximum number of loops the 'ip address flush' logic
              will attempt before giving up. The default is 10.  Zero (0)
              means loop until all addresses are removed.

       -f, -family <FAMILY>
              Specifies the protocol family to use. The protocol family iden-
              tifier can be one of inet, inet6, bridge, mpls or link.  If this
              option is not present, the protocol family is guessed from other
              arguments. If the rest of the command line does not give enough
              information to guess the family, ip falls back to the default
              one, usually inet or any.  link is a special family identifier
              meaning that no networking protocol is involved.

       -4     shortcut for -family inet.

       -6     shortcut for -family inet6.

       -B     shortcut for -family bridge.

       -M     shortcut for -family mpls.

       -0     shortcut for -family link.

       -o, -oneline
              output each record on a single line, replacing line feeds with
              the '\' character. This is convenient when you want to count
              records with wc(1) or to grep(1) the output.

       -r, -resolve
              use the system's name resolver to print DNS names instead of
              host addresses.

       -n, -netns <NETNS>
              switches ip to the specified network namespace NETNS.  Actually
              it just simplifies executing of:

              ip netns exec NETNS ip [ OPTIONS ] OBJECT { COMMAND | help }

              to

              ip -n[etns] NETNS [ OPTIONS ] OBJECT { COMMAND | help }

       -N, -Numeric
              Print the number of protocol, scope, dsfield, etc directly in-
              stead of converting it to human readable name.

       -a, -all
              executes specified command over all objects, it depends if com-
              mand supports this option.

       -c[color][={always|auto|never}
              Configure color output. If parameter is omitted or always, color
              output is enabled regardless of stdout state. If parameter is
              auto, stdout is checked to be a terminal before enabling color
              output. If parameter is never, color output is disabled. If
              specified multiple times, the last one takes precedence. This
              flag is ignored if -json is also given.

              Used color palette can be influenced by COLORFGBG environment
              variable (see ENVIRONMENT).

       -t, -timestamp
              display current time when using monitor option.

       -ts, -tshort
              Like -timestamp, but use shorter format.

       -rc, -rcvbuf<SIZE>
              Set the netlink socket receive buffer size, defaults to 1MB.

       -iec   print human readable rates in IEC units (e.g. 1Ki = 1024).

       -br, -brief
              Print only basic information in a tabular format for better
              readability. This option is currently only supported by ip addr
              show and ip link show commands.

       -j, -json
              Output results in JavaScript Object Notation (JSON).

       -p, -pretty
              The default JSON format is compact and more efficient to parse
              but hard for most users to read.  This flag adds indentation for
              readability.

IP - COMMAND SYNTAX
   OBJECT
       address
              - protocol (IP or IPv6) address on a device.

       addrlabel
              - label configuration for protocol address selection.

       l2tp   - tunnel ethernet over IP (L2TPv3).

       link   - network device.

       maddress
              - multicast address.

       monitor
              - watch for netlink messages.

       mroute - multicast routing cache entry.

       mrule  - rule in multicast routing policy database.

       neighbour
              - manage ARP or NDISC cache entries.

       netns  - manage network namespaces.

       ntable - manage the neighbor cache's operation.

       route  - routing table entry.

       rule   - rule in routing policy database.

       tcp_metrics/tcpmetrics
              - manage TCP Metrics

       token  - manage tokenized interface identifiers.

       tunnel - tunnel over IP.

       tuntap - manage TUN/TAP devices.

       xfrm   - manage IPSec policies.

       The names of all objects may be written in full or abbreviated form,
       for example address can be abbreviated as addr or just a.

   COMMAND
       Specifies the action to perform on the object.  The set of possible ac-
       tions depends on the object type.  As a rule, it is possible to add,
       delete and show (or list ) objects, but some objects do not allow all
       of these operations or have some additional commands. The help command
       is available for all objects. It prints out a list of available com-
       mands and argument syntax conventions.

       If no command is given, some default command is assumed.  Usually it is
       list or, if the objects of this class cannot be listed, help.

ENVIRONMENT
       COLORFGBG
              If set, it's value is used for detection whether background is
              dark or light and use contrast colors for it.

              COLORFGBG environment variable usually contains either two or
              three values separated by semicolons; we want the last value in
              either case.  If this value is 0-6 or 8, chose colors suitable
              for dark background:

              COLORFGBG=";0" ip -c a

EXIT STATUS
       Exit status is 0 if command was successful, and 1 if there is a syntax
       error.  If an error was reported by the kernel exit status is 2.

EXAMPLES
       ip addr
           Shows addresses assigned to all network interfaces.

       ip neigh
           Shows the current neighbour table in kernel.

       ip link set x up
           Bring up interface x.

       ip link set x down
           Bring down interface x.

       ip route
           Show table routes.

HISTORY
       ip was written by Alexey N. Kuznetsov and added in Linux 2.2.

SEE ALSO
       ip-address(8), ip-addrlabel(8), ip-l2tp(8), ip-link(8), ip-maddress(8),
       ip-monitor(8), ip-mroute(8), ip-neighbour(8), ip-netns(8), ip-
       ntable(8), ip-route(8), ip-rule(8), ip-tcp_metrics(8), ip-token(8), ip-
       tunnel(8), ip-xfrm(8)
       IP Command reference ip-cref.ps

REPORTING BUGS
       Report any bugs to the Network Developers mailing list <net-
       dev@vger.kernel.org> where the development and maintenance is primarily
       done.  You do not have to be subscribed to the list to send a message
       there.

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

iproute2                          20 Dec 2011                            IP(8)