NETGEAR GS748T User Manual

111
GS748T Smart Switch
IGMP Snooping Configuration
Use the IGMP Snooping Configuration page to configure the parameters for IGMP snooping,
which is used to build forwarding lists for multicast traffic.
To access the IGMP Snooping Configuration page, click Switching
 Multicast  IGMP
Snooping
 IGMP Snooping Configuration.
To configure IGMP Snooping:
1. Ena
ble or disable IGMP Snooping on the switch.
• Enable. The switch sn
oops all IGMP packets it receives to determine which segments
should receive packets directed to the group address.
• Dis
able. The switch does not snoop IGMP packets.
2. Choo
se whether to validate the IGMP IP header.
• Enable. Th
e switch checks the IP header of all IGMP messages for the Router Alert
option. If the option is not present, the packet is dropped.
• Dis
able. The IGMP IP header is not checked for Router Alert option.
3. Choo
se whether to block unknown multicast addresses.
• Enable. Packet
s with unknown multicast MAC address in the destination field will be
dropped.
• Dis
able. Packets with unknown destination multicast MAC addresses are processed.
4. Click App
ly to send the updated configuration to the switch. Configuration changes take
effect immediately.
5. Click Canc
el to cancel the configuration on the screen and reset the data on the screen to
the latest value of the switch

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