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PTP Operational Overview
Profiles and Domains
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PRISM MPI-MPX User Manual
Profiles and Domains
Multiple domains and profiles can coexist on the same network.
Profiles
The IEEE1588 standard defines multiple parameters, such as the rates for Sync and
Announce messages, and optional functions such as grandmaster clusters. Specific
industries wanting to use PTP are encouraged to define their own “profile,” which
allows the PTP standard to be tuned for specific applications. The profile defines the
default and range of each parameter, and defines with options are required, allowed, or
prohibited.
In the Prism monitor, the user should select the PTP profile (General, ST2059, or AES67).
The user can then modify the profile parameters and save as part of an instrument
preset. The allowed range of the parameters is restricted to that which is allowed for
the selected profile type.
Domains
The IEEE1588 standard defines “domains,” which allow multiple PTP services to coexist
simultaneously on one physical Ethernet connection. For example, on a given network
one master and several slaves can be using domain 0 while a second master and other
slaves are using domain 1. These two PTP services are independent. One use for this is
to have masters on different domains provide PTP on different profiles. For example,
domain 0 might be an AES67 profile, domain 1 could be a master using the AVB
(802.1AS) profile, and domain 127 could be a master on the SMPTE ST2059 profile.