RTS DV-3400 Informações Técnicas descarregar pdf (Página 185)

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Time Protocols

Selecting a Time Synchronization Protocol or Turning Off Time Protocol Operation

SNTP Time Synchronization

SNTP provides two operating modes:

■ Broadcast Mode: The switch acquires time updates by accepting the

time value from the first SNTP time broadcast detected. (In this case,

the SNTP server must be configured to broadcast time updates to the

network broadcast address. Refer to the documentation provided

with your SNTP server application.) Once the switch detects a partic-

ular server, it ignores time broadcasts from other SNTP servers unless

the configurable

Poll Interval expires three consecutive times without

an update received from the first-detected server.

Note To use Broadcast mode, the switch and the SNTP server must be in the same

subnet.

■ Unicast Mode: The switch requests a time update from the config-

ured SNTP server. (You can configure one server using the menu

interface, or up to three servers using the CLI

sntp server command.)

This option provides increased security over the Broadcast mode by

specifying which time server to use instead of using the first one

detected through a broadcast.

Selecting a Time Synchronization

Protocol or Turning Off Time Protocol

Operation

General Steps for Running a Time Protocol on the Switch:

1. Select the time synchronization protocol: SNTP or TimeP (the default).

2. Enable the protocol. The choices are:

• SNTP:

Broadcast or Unicast

• TimeP: DHCP or Manual

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