TIPC-LINK(8)                         Linux                        TIPC-LINK(8)

       tipc-link - show links or modify link properties

       tipc link set { priority PRIORITY | tolerance TOLERANCE | window WINDOW
               } link LINK

       tipc link get { priority | tolerance | window } link LINK

       tipc link statistics { show [ link LINK ] | reset link LINK }

       tipc link list

       Options (flags) that can be passed anywhere in the command chain.

       -h, --help
              Show help about last valid command. For example tipc link --help
              will show link help and tipc --help will show general help. The
              position of the option in the string is irrelevant.

   Link statistics
       ACTIVE link state
              An ACTIVE link is serving traffic. Two links to the same node
              can become ACTIVE if they have the same link priority.  If there
              is more than two links with the same priority the additional
              links will be put in STANDBY state.

       STANDBY link state
              A STANDBY link has lower link priority than an ACTIVE link. A
              STANDBY link has control traffic flowing and is ready to take
              over should the ACTIVE link(s) go down.

              The Maximum Transmission Unit. The two endpoints advertise their
              default or configured MTU at initial link setup and will agree
              to use the lower of the two values should they differ.

              The total amount of transmitted or received TIPC packets on a
              link. Including fragmented and bundled packets.

              Represented in the form fragments/fragmented.  Where fragmented
              is the amount of data messages which have been broken into frag-
              ments.  Subsequently the fragments are the total amount of pack-
              ets that the fragmented messages has been broken into.

              Represented in the form bundles/bundled.  If a link becomes con-
              gested the link will attempt to bundle data from small bundled
              packets into bundles of full MTU size packets before they are

              Shows the average packet size in octets/bytes for a sample of
              packets. It also shows the packet size distribution of the sam-
              pled packets in the intervals

              0-64 bytes
              64-256 bytes
              256-1024 bytes
              1024-4096 bytes
              4096-16384 bytes
              16384-32768 bytes
              32768-66000 bytes

       Message counters

              states - Number of link state messages

              probes - Link state messages with probe flag set. Typically sent
              when a link is idle

              nacks - Number of negative acknowledgement (NACK) packets sent
              and received by the link

              defs - Number of packets received out of order

              dups - Number of duplicate packets received

       Congestion link
              The number of times an application has tried to send data when
              the TIPC link was congested

       Send queue
              Max is the maximum amount of messages that has resided in the
              out queue during the statistics collection period of a link.

              Avg is the average outqueue size during the lifetime of a link.

   Link properties
              The priority between logical TIPC links to a particular node.
              Link priority can range from 0 (lowest) to 31 (highest).

              Link tolerance specifies the maximum time in milliseconds that
              TIPC will allow a communication problem to exist before taking
              the link down. The default value is 1500 milliseconds.

              The link window controls how many unacknowledged messages a link
              endpoint can have in its transmit queue before TIPC's congestion
              control mechanism is activated.

       Exit status is 0 if command was successful or a positive integer upon

       tipc(8), tipc-media(8), tipc-bearer(8), tipc-nametable(8), tipc-
       node(8), tipc-socket(8)

       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

       Richard Alpe <richard.alpe@ericsson.com>

iproute2                          02 Jun 2015                     TIPC-LINK(8)
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