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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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NAME | SYNOPSIS | OPTIONS | DESCRIPTION | EXAMPLES | EXIT STATUS | SEE ALSO | REPORTING BUGS | AUTHOR | COLOPHON |
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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 ] |
[ { broadcast [ BROADCAST | REPLICAST | AUTOSELECT [
ratio SIZE ] ] } ]
tipc link get
[ { priority | tolerance | window } link LINK ] |
[ { broadcast } ]
tipc link statistics { show [ link LINK ] | reset link LINK }
tipc link list
tipc link monitor set { threshold }
tipc link monitor get { threshold }
tipc link monitor summary
tipc link monitor list
[ media { eth | ib } device DEVICE ] |
[ media udp name NAME ]
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.
-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.
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.
Monitor properties
threshold
The threshold specifies the cluster size exceeding which
the link monitoring algorithm will switch from "full-mesh"
to "overlapping-ring". If set of 0 the overlapping-ring
monitoring is always on and if set to a value larger than
anticipated cluster size the overlapping-ring is disabled.
The default value is 32.
Monitor information
table_generation
Represents the event count in a node's local monitoring
list. It steps every time something changes in the local
monitor list, including changes in the local domain.
cluster_size
Represents the current count of cluster members.
algorithm
The current supervision algorithm used for neighbour
monitoring for the bearer. Possible values are full-mesh
or overlapping-ring.
status
The node status derived by the local node. Possible status
are up or down.
monitored
Represent the type of monitoring chosen by the local node.
Possible values are direct or indirect.
generation
Represents the domain generation which is the event count
in a node's local domain. Every time something changes
(peer add/remove/up/down) the domain generation is stepped
and a new version of node record is sent to inform the
neighbors about this change. The domain generation helps
the receiver of a domain record to know if it should ignore
or process the record.
applied_node_status
The node status reported by the peer node for the
succeeding peers in the node list. The Node list is a
circular list of ascending addresses starting with the
local node. Possible status are: U or D. The status U
implies up and D down.
[non_applied_node:status]
Represents the nodes and their status as reported by the
peer node. These nodes were not applied to the monitoring
list for this peer node. They are usually transient and
occur during the cluster startup phase or network
reconfiguration. Possible status are: U or D. The status U
implies up and D down.
Broadcast properties
BROADCAST
Forces all multicast traffic to be transmitted via
broadcast only, irrespective of cluster size and number of
destinations.
REPLICAST
Forces all multicast traffic to be transmitted via
replicast only, irrespective of cluster size and number of
destinations.
AUTOSELECT
Auto switching to broadcast or replicast depending on
cluster size and destination node number.
ratio SIZE
Set the AUTOSELECT criteria, percentage of destination
nodes vs cluster size.
tipc link monitor list
Shows the link monitoring information for cluster members on
device data0.
tipc link monitor summary
The monitor summary command prints the basic attributes.
Exit status is 0 if command was successful or a positive integer
upon failure.
tipc(8), tipc-media(8), tipc-bearer(8), tipc-nametable(8),
tipc-node(8), tipc-peer(8), tipc-socket(8)
Report any bugs to the Network Developers mailing list
<[email protected]> where the development and maintenance is
primarily done. You do not have to be subscribed to the list to
send a message there.
Richard Alpe <[email protected]>
This page is part of the iproute2 (utilities for controlling
TCP/IP networking and traffic) project. Information about the
project can be found at
⟨http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2⟩.
If you have a bug report for this manual page, send it to
[email protected], [email protected]. This page was
obtained from the project's upstream Git repository
⟨https://git.kernel.org/pub/scm/network/iproute2/iproute2.git⟩ on
2025-08-11. (At that time, the date of the most recent commit
that was found in the repository was 2025-08-08.) If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page,
or you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a
mail to [email protected]
iproute2 22 Mar 2019 TIPC-LINK(8)
Pages that refer to this page: tipc(8), tipc-bearer(8), tipc-media(8), tipc-nametable(8), tipc-node(8), tipc-peer(8), tipc-socket(8)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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