NETGEAR GS716T User Manual

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GS716T and GS724T Gigabit Smart Switches
Time
GS716T and GS724T Smart Switches 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. GS716T and GS724T Smart
Switches 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.
Neighbor State Specifies the state of the neighbor cache entry. The following are the states for
dynamic entries in the IPv6 neighbor discovery cache:
• Reachable. Positive confirmation was received within the last Reachable Time
milliseconds that the forward path to the neighbor was functioning properly. While
in REACH state, the device takes no special action as packets are sent.
• Stale. More than ReachableTime milliseconds have elapsed since the last positive
confirmation was received that the forward path was functioning properly. While in
STALE state, the device takes no action until a packet is sent.
• Delay. More than ReachableTime milliseconds have elapsed since the last positive
confirmation was received that the forward path was functioning properly. A packet
was sent within the last DELAY_FIRST_PROBE_TIME seconds. If no reachability
confirmation is received within DELAY_FIRST_PROBE_TIME seconds of entering
the DELAY state, send a neighbor solicitation message and change the state to
PROBE.
• Probe. A reachability confirmation is actively sought by resending neighbor
solicitation messages every RetransTimer milliseconds until a reachability
confirmation is received.
• Unknown. The switch cannot determine the state of the cache entry.
Last Updated. Time since the address was confirmed to be reachable.
Field Description

NETGEAR GS716T Specifications

General

Switch type	Managed
Switch layer	L3
Quality of Service (QoS) support	Yes
Stackable	-
Certification	CE, FCC, VCCI, EN, C-Tick, CCC, CSA, UL/cUL, IEC
Product color	Blue
LED indicators	Activity, Link, Power
SFP module slots quantity	2
Basic switching RJ-45 Ethernet ports type	Gigabit Ethernet (10/100/1000)
Basic switching RJ-45 Ethernet ports quantity	16
Number of VLANs	256
Networking standards	IEEE 802.1D, IEEE 802.1as, IEEE 802.1s, IEEE 802.1v, IEEE 802.3, IEEE 802.3ab, IEEE 802.3ad, IEEE 802.3i, IEEE 802.3u, IEEE 802.3x, IEEE 802.3z
Copper ethernet cabling technology	10BASE-T, 100BASE-TX, 100BASE-T, 1000BASE-T
Noise level	0 dB
Mean time between failures (MTBF)	567680 h
DHCP features	DHCP client
Security algorithms	802.1x RADIUS, HTTPS, SSL/TLS
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (typical)	14.4 W
MAC address table	16000 entries
Number of static routes	32
Operating altitude	0 - 3000 m
Storage temperature (T-T)	-20 - 70 °C
Operating temperature (T-T)	0 - 50 °C
Storage relative humidity (H-H)	0 - 95 %
Operating relative humidity (H-H)	0 - 90 %
Cables included	AC
Supported network protocols	IP

Weight and Dimensions

Depth	204 mm
Width	440 mm
Height	43 mm
Weight	2570 g