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pmc(8)

linuxptp
October 2013

linuxptp

Precision Time Protocol (PTP, IEEE1588) implementation for Linux

NAME

pmc - PTP management client

SYNOPSIS

pmc [ -f config-file ] [ -2 | -4 | -6 | -u ] [ -b boundary-hops ] [ -d domain-number ] [ -i interface ] [ -s uds-address ] [ -t transport-specific-field ] [ long-options ] [ -v ] [ -z ] [ command ] ...

DESCRIPTION

pmc is a program which implements a PTP management client according to IEEE standard 1588. The program reads from the standard input or from the command line actions specified by name and management ID, sends them over the selected transport and prints any received replies. There are three actions supported: GET retrieves the specified information, SET updates the specified information and CMD (or COMMAND) initiates the specified event.
By default the management commands are addressed to all ports. The TARGET command can be used to select a particular clock and port for the subsequent messages.
Command help can be used to get a list of supported actions and management IDs.

OPTIONS

-f config-file
Read configuration from the specified file. No configuration file is read by default.
-2 Select the IEEE 802.3 network transport.
-4 Select the UDP IPv4 network transport. This is the default transport.
-6 Select the UDP IPv6 network transport.
-u Select the Unix Domain Socket transport.
-b boundary-hops
Specify the boundary hops value in sent messages. The default is 1.
-d domain-number
Specify the domain number in sent messages. The default is 0.
-i interface
Specify the network interface. The default is /var/run/pmc.$pid for the Unix Domain Socket transport and eth0 for the other transports.
-s uds-address
Specifies the address of the server’s UNIX domain socket. The default is /var/run/ptp4l.
-t transport-specific-field
Specify the transport specific field in sent messages as a hexadecimal number. The default is 0x0.
-h Display a help message.
-v Prints the software version and exits.
-z The official interpretation of the 1588 standard mandates sending GET actions with valid (but meaningless) TLV values. Therefore the pmc program normally sends GET requests with properly formed TLV values. This option enables the legacy option of sending zero length TLV values instead.

LONG OPTIONS

Each and every configuration file option (see below in sections PROGRAM OPTIONS and PORT OPTIONS) may also appear as a "long" style command line argument. For example, the transportSpecific option may be set using either of these two forms:
--transportSpecific 1 --transportSpecific=1
Option values given on the command line override values in the global section of the configuration file (which, in turn, overrides default values).

CONFIGURATION FILE

The configuration file is divided into sections. Each section starts with a line containing its name enclosed in brackets and it follows with settings. Each setting is placed on a separate line, it contains the name of the option and the value separated by whitespace characters. Empty lines and lines starting with # are ignored.
The global section (indicated as [global]) sets the global program options as well as the default port specific options. Other sections are port specific sections and they override the default port options. The name of the section is the name of the configured port (e.g. [eth0] ).

PROGRAM OPTIONS

domainNumber
The domain attribute of the local clock. The default is 0.

PORT OPTIONS

transportSpecific
The transport specific field. Must be in the range 0 to 255. The default is 0.
network_transport
Select the network transport. Possible values are UDPv4, UDPv6 and L2. The default is UDPv4.
ptp_dst_mac
The MAC address to which PTP management messages should be sent. Relevant only with L2 transport. The default is 01:1B:19:00:00:00.

MANAGEMENT IDS

ANNOUNCE_RECEIPT_TIMEOUT
CLOCK_ACCURACY
CLOCK_DESCRIPTION
CURRENT_DATA_SET
DEFAULT_DATA_SET
DELAY_MECHANISM
DOMAIN
GRANDMASTER_SETTINGS_NP
LOG_ANNOUNCE_INTERVAL
LOG_MIN_PDELAY_REQ_INTERVAL
LOG_SYNC_INTERVAL
NULL_MANAGEMENT
PARENT_DATA_SET
PORT_DATA_SET
PORT_DATA_SET_NP
PORT_PROPERTIES_NP
PORT_STATS_NP
PRIORITY1
PRIORITY2
SLAVE_ONLY
TIMESCALE_PROPERTIES
TIME_PROPERTIES_DATA_SET
TIME_STATUS_NP
TRACEABILITY_PROPERTIES
USER_DESCRIPTION
VERSION_NUMBER

WARNING

Be cautious when the same configuration file is used for both ptp4l and pmc. Keep in mind that values specified in the configuration file take precedence over their default values. If a certain option which is common to ptp4l and pmc is specified to a non-default value in the configuration file (e.g. for ptp4l), then this non-default value applies also for pmc. This might be not what is expected.
To avoid securely these unexpected behaviour, different configuration files for ptp4l and pmc are recommended.

SEE ALSO

REFERENCED BY

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