Netgear FS728TPv2 - ProSAFE 24 Port 10/100 Smart Switch with 4 Gigabit Ports and 24 PoE Ports 관리자 가이드

port VLAN ID (PVID) of the port to be connected in that management VLAN be the same 
as the management VLAN ID. 

The management VLAN has the following requirements:

Only one management VLAN can be active at a time.

When a new management VLAN is configured, connectivity through the existing 

management VLAN is lost.

The management station should be reconnected to the port in the new management 

VLAN.

Make sure that the VLAN to be configured as the management 

VLAN exists. And make sure that the PVID of at least one port that is 
a port of the VLAN is the same as the management VLAN ID. For 
information about creating VLANs and configuring the PVID for a 
port, see 

82.

If you change any of the network connection parameters, click Apply to apply the changes 

to the system.

Click Cancel to cancel the configuration on the screen and reset the data on the screen to 

the latest value of the switch.

Time

FS728TP Smart Switch software supports the Simple Network Time Protocol (SNTP). You 
can also set the system time manually

SNTP assures accurate network device clock time synchronization up to the millisecond. 
Time synchronization is performed by a network SNTP server. FS728TP Smart Switch 
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: 

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

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

time servers provide primary network time standards. 

: 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.