Netgear GS728TP User Manual download pdf (Page 34)

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101

Configuring System Information

ProSafe M5300 Switch

Time

ProSafe software supports the Simple Network Time Protocol (SNTP).

SNTP assures accurate network device clock time synchronization up to the millisecond.

Time synchronization is performed by a network SNTP server. ProSafe software operates

only as an SNTP client and cannot provide time services to other systems.

Time sources are established by Stratums. Stratums define the accuracy of the reference

clock. The higher the stratum (where zero is the highest), the more accurate the clock. The

device receives time from stratum 1 and above since it is itself a stratum 2 device.

The following is an example of stratums:

• Stratum 0: A real-time clock is used as the time source, for example, a GPS system.

• Stratum 1: A server that is directly linked to a Stratum 0 time source is used. Stratum 1

time servers provide primary network time standards.

• Stratum 2: The time source is distanced from the Stratum 1 server over a network path.

For example, a Stratum 2 server receives the time over a network link, via NTP, from a

Stratum 1 server.

Information received from SNTP servers is evaluated based on the time level and server

type.

SNTP time definitions are assessed and determined by the following time levels:

• T1: Time at which the original request was sent by the client.

• T2: Time at which the original request was received by the server.

• T3: Time at which the server sent a reply.

• T4: Time at which the client received the server's reply.

IsRtr True(1) if the neighbor machine is a router, false(2)

otherwise.

Neighbor State The state of the neighboring switch:

• reachable(1) - The neighbor is reachable by this

switch.

• stale(2) - Information about the neighbor is

scheduled for deletion.

• delay(3) - No information has been received from

neighbor during delay period.

• probe(4) - Switch is attempting to probe for this

neighbor.

• unknown(6) - Unknown status.

Last Updated The last sysUpTime that this neighbor has been

updated.

Field Description

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Netgear GS728TP User Manual Page 34

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