NETGEAR GS748T User Manual

105
GS748T Smart Switch
To configure an MST instance:
1. T
o add an MST instance, configure the MST values and click Add:
• MST ID. S
pecify the ID of the MST to create. Valid values for this are between 1 and
4094.
• Priority. S
pecifies the bridge priority value for the MST. When switches or bridges are
running STP, each is assigned a priority. After exchanging BPDUs, the switch with the
lowest priority value becomes the root bridge. The bridge priority is a multiple of 4096.
If you specify a priority that is not a multiple of 4096, the priority is automatically set to
the next lowest priority that is a multiple of 4096. For example, if the priority is
attempted to be set to any value between 0 and 4095, it will be set to 0. The default
priority is 32768.The valid range is 0–61440.
• VLAN ID. The
menu contains all VLANs configured on the switch. Select a VLAN to
associate with the MST instance.
2. T
o delete an MST instance, select the check box next to the instance and click Delete.
3. T
o modify an MST instance, select the check box next to the instance to configure, update
the values, and click Apply. You can select multiple check boxes to apply the same setting
to all selected ports.
4. Click Canc
el to cancel the configuration on the screen and reset the data on the screen to
the latest value of the switch.
For each configured instance, the information described
in the following table displays on the
page.
Field Description
Bridge Identifier The bridge identifier for the selected MST inst
ance. It is made up using the bridge priority
and the base MAC address of the bridge.
Time Since
Topology
Change
Displays the total amount of time since the topology of the selected MST instance last
changed. The time is displayed in hour/minute/second format, for example, 5 hours, 10
minutes, and 4 seconds.
Topology
Chan
ge Count
Displays the total number of times topology has changed for the selected MST instance.
Topology
Chan
ge
Indicates whether a topology change is in progress on any port assigned to the selected
MST instance. The possible values are True or False.
Designated Root Displays the bridge identifier of the root bri
dge, which is made up from the bridge priority
and the base MAC address of the bridge.
Root Path Cost Displays the path cost to the Desig
nated Root for this MST instance.
Root Port Indicates the port to access
the Designated Root for this MST instance.

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