NETGEAR GS748T User Manual

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GS748T Smart Switch
The following table describes the information available on the IP Statistics page
Field Description
IpInReceives The total number of input datagrams received from interfaces, including
those received in error.
IpInHdrErrors The number of input datagrams discarded due to errors in their IP
headers, including bad checksums, version number mismatch, other
format errors, time-to-live exceeded, errors discovered in processing
their IP options, etc.
IpInAddrErrors The number of input datagrams discarded because the IP address in
their IP header's destination field was not a valid address to be received
at this entity. This count includes invalid addresses (e.g., 0.0.0.0) and
addresses of unsupported Classes (e.g., Class E). For entities which
are not IP Gateways and therefore do not forward datagrams, this
counter includes datagrams discarded because the destination address
was not a local address.
IpForwDatagrams The number of input datagrams for which this entity was not their final
IP destination, as a result of which an attempt was made to find a route
to forward them to that final destination. In entities which do not act as
IP Gateways, this counter includes only those packets which were
Source-Routed via this entity, and the Source-Route option processing
was successful.
IpInUnknownProtos The number of locally-addressed datagrams received successfully but
discarded because of an unknown or unsupported protocol.
IpInDiscards The number of input IP datagrams for which no problems were
encountered to prevent their continued processing, but which were
discarded (e.g., for lack of buffer space). Note that this counter does not
include any datagrams discarded while awaiting re-assembly.
IpInDelivers The total number of input datagrams successfully delivered to IP
user-protocols (including ICMP).
IpOutRequests The total number of IP datagrams which local IP user-protocols
(including ICMP) supplied to IP in requests for transmission. Note that
this counter does not include any datagrams counted in
ipForwDatagrams.
IpOutDiscards The number of output IP datagrams for which no problem was
encountered to prevent their transmission to their destination, but which
were discarded (e.g., for lack of buffer space). Note that this counter
would include datagrams counted in ipForwDatagrams if any such
packets met this (discretionary) discard criterion.
IpOutNoRoutes The number of IP datagrams discarded because no route could be
found to transmit them to their destination. Note that this counter
includes any packets counted in ipForwDatagrams which meet this
`no-route' criterion. Note that this includes any datagrams which a host
cannot route because all of its default gateways are down.
IpReasmTimeout The maximum number of seconds which received fragments are held
while they are awaiting reassembly at this entity.

NETGEAR GS748T Specifications

General

Basic switching RJ-45 Ethernet ports quantity	48
MAC address table	16000 entries
Packet buffer memory	1.632 MB
Maximum data transfer rate	1 Gbit/s
Latency	20 µs
I/O ports	48 RJ-45 connectors for 10BASE-T, 100BASE-TX, and 1000BASE-T (Auto Uplink on all ports) 4 SFP slots for fiber Gigabit Ethernet modules
Dimensions (WxDxH)	440 x 260 x 43 mm
Power requirements	100-240VAC 50/60 Hz
Networking features	10BASE-T, 100BASE-TX, 1000BASE-T
Connectivity technology	Wired
Full duplex	Yes
Networking standards	IEEE 802.3x
Minimum system requirements	Category 5 network cables Network card for each PC Network software (e.g., Windows)
Mean time between failures (MTBF)	69930 h
Safety	UL listed (UL 1950)/cUL, IEC950/EN60950
LED indicators	Link, Power
Power consumption (typical)	70 W
Storage temperature (T-T)	-10 - 70 °C
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 90 %

Weight and Dimensions

Weight	4000 g