Tripp Lite NGI-M08C4-L2, Owner'S Manual

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Parameter Description
Modbus TCP Settings
State
Select this option to enable / disable the Modbus on the Switch.
Apply Click Apply to take effect the settings.
Refresh Click Refresh to begin configuring this screen afresh.
Modbus TCP Information
Download
Clicks the Download button to download all of the regisers
information to load host.
6.11 PTP (IEEE-1588 V2)
PTP (Precision Time Protocol) is a distributed protocol to do time synchronization with each
other systems in the network.
There are 4 different clocks in PTP:
1. Ordinary Clock : Switch communicates with the network by using specified single port.
It will be same as grand master clock.
2.
Boundary Clock
: Switch can use multiple ports to communicate with network and each
port behaves as ordinary clock. Port is selected as either master or member based on its
local clock and data sets.
3.
Transparent Clock
: It forwards all received PTP messages and measures and
accumulate delay timers in correction field.
4. Forward Clock : It forward all received PTP messages in domain ports.
PTP works in 2 phases:
1. Establishing hierarchy : Only ordinary or boundary clocks will have this phase.
a. Processes all received announce messages by using “Best Master Clock (BMC)”
algorithm and identifies itself as either master or member.
2. Clock Synchronization :
a. Master sends “Sync” message to member
b. Member sends “DReq (Delay Request)” message to master
c. Master sends “Dresp (Delay Response)” message to member
d. Member will adjust its clock by using parameters in above messages.
6.11.1 General Settings
6.11.1.1 CLI Configuration
Node Command Description
Enable show ptp information This command displays PTP global
configurations, PTP domain configurations and
PTP port configurations.
enable configure terminal This command changes the node to configure
node.