TIPC-LINK(8)

NAME
tipc-link - show links or modify link properties

SYNOPSIS
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
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.

DESCRIPTION

  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.

MTU
    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.

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

Fragments
    Represented in the form fragments/fragmented. Where fragmented is the amount of data messages which have been broken into fragments. Subsequently the fragments are the total amount of packets that the fragmented messages has been broken into.

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

Profile
    Shows the average packet size in octets/bytes for a sample of packets. It also shows the packet size distribution of the sampled 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

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

tolerance
    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.

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

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

REPORTING BUGS
Report any bugs to the Network Developers mailing list <netdev@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
Richard Alpe <richard.alpe@ericsson.com>