MRV Communications LX-4000 Series Technické informace stáhnout pdf (Strana 606)

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APPENDIX J NTP Client Overview

For NTP to function, an LX Series NTP client must be able to access an NTP

timeserver on the network. NTP runs over User Datagram Protocol (UDP),

which in turn runs over IP. NTP is a tiered time distribution system with

redundancy capability, and measures delays within the network and within the

algorithms on the machine on which it is running. Using these tools and

techniques, it synchronizes clocks to within milliseconds of each other when

connected on a Local Area Network.

The LX-Series provides an NTP Version 4 (RFC2030) implementation. The

Network Time Protocol (NTP) defines a set of procedures for synchronizing

clocks on hosts connected to a network with access to the Internet. NTP goes

beyond simple routines that occasionally query a timeserver, and adjusts the

local clock to a time value received from the server. LX Series Products act as

a Client, which query defined timeserver hosts on the network.

The LX Series allows the LX administrator to configure a Client mode Primary

and an optional Client mode Alternate NTP Time Server target IP Address,

which the LX NTP Client queries to obtain and synchronize its time and date.

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