MRV Communications LX-4000 Series Información técnica descargar pdf (Pagina 607)

100

101

J-2 How NTP Works

LX Series Configuration Guide

How NTP Works

After a Primary Time Server address and the (optional)

Alternate Time Server target address(es) are configured and

NTP is enabled, the LX begins exchanging messages with the

server(s) in order to calibrate propagation delay and coordinate

Universal Time (UTC), which is the same as Greenwich Mean

Time. Using engineered algorithms, the client (LX) adjusts its

time and then continues a regular client/server campaign to

maintain synchronization with the timeserver(s). NTP is

extremely efficient, requiring no more than one packet per

minute to synchronize Client and Server time within one

millisecond of each other.

In the event you configure only a Primary NTP timeserver, and

the LX Client does not receive a response to its time request

query, the NTP client backs off and the Client queries will halt

for several minutes and then begin to query the Primary Server

again. This cycle continues until such time that the Primary

Server responds to the LX Series NTP Client timeserver

requests.

In the event both a Primary and Alternate NTP timeserver

address are configured, the Client (LX) polls both configured

timeservers. After the LX NTP Client establishes a UTC, the LX

continues a regular client/server campaign to maintain

synchronization with the timeservers. If the Primary Server no

longer responds to the LX Client timeserver queries, it then

continues querying the Alternate time server to adjust its date

and time. The LX NTP Client then polls both the Primary and

Alternate timeserver at approximately 1 minute intervals. The

LX NTP Client makes several attempts to contact the primary

server. Once these attempts fail it defers to polling only the

Alternate server for approximately fifteen minutes. Once this

sleep period expires, the Client (LX) again attempts to poll both

the Primary and Alternate Servers. This cycle continues until the

primary timeserver is reachable.

1 2 ... 602 603 604 605 606 607 608 609 610 611 612 ... 691 692

Comentarios a estos manuales

Sin comentarios

MRV Communications LX-4000 Series Información técnica Pagina 607

Comentarios a estos manuales

Relacionado con productos y manuales para Servidores MRV Communications LX-4000 Series