Provided by: iproute2_4.3.0-1ubuntu3.16.04.5_amd64 
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>