Ntp Configuration Task List; Configuring Ntp Implementation Modes - 3Com 5500-EI PWR Install Manual

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When a 3Com S5500-EI Ethernet switch works in server mode or symmetric passive mode, you

need not to perform related configurations on this switch but do that on the client or the

symmetric-active peer.

The NTP server mode, NTP broadcast mode, or NTP multicast mode takes effect only after the

local clock of the 3Com S5500-EI Ethernet switch has been synchronized.

When symmetric peer mode is configured on two Ethernet switches, to synchronize the clock of the

two switches, make sure at least one switch's clock has been synchronized.

NTP Configuration Task List

Complete the following tasks to configure NTP:

Configuring Access Control Right

Configuring NTP Authentication

Configuring Optional NTP Parameters

Displaying NTP Configuration

Configuring NTP Implementation Modes

An S5500-EI Ethernet switch can work in one of the following NTP modes:

Configuring NTP Server/Client Mode

Configuring the NTP Symmetric Peer Mode

Configuring NTP Broadcast Mode

Configuring NTP Multicast Mode

To protect unused sockets against attacks by malicious users and improve security, 3Com S5500-EI

series Ethernet switches provide the following functions:

UDP port 123 is opened only when the NTP feature is enabled.

UDP port 123 is closed as the NTP feature is disabled.

These functions are implemented as follows:

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5500-ei series