NETGEAR GS748T User Manual

107
GS748T Smart Switch
6. Click Cancel to cancel the configuration on the screen and reset the data on the screen to
the latest value of the switch
7. If you
make any configuration changes, click Apply to send the updated configuration to the
switch. Configuration changes take place immediately.
The following table describes the read-only MST port configuration information displayed on
t
he Spanning Tree CST Configuration page
Field Description
Auto-calculated Port Path
Cost
Displays whether the path cost is automatically calculated (Enabled) or not
(Di
sabled). Path cost is calculated based on the link speed of the port if the
configured value for Port Path Cost is zero.
Port ID The port identifier for the specified port
within the selected MST instance. It
is made up from the port priority and the interface number of the port.
Port Up Time Since Counters
Last Cl
eared
Time since the counters were last cleared, displayed in Days, Hours,
Minutes, and Seconds.
Port Mode Spanning Tree Protocol Administrative Mode associated with the port or port
channel. Possible values are Enable or Disable.
Port Forwarding State Indicates the current STP state of a port. If enabled, the port state
d
etermines what forwarding action is taken on traffic. Possible port states
are:
• D
isabled: STP is currently disabled on the port. The port forwards traffic
while learning MAC addresses.
• B
locking: The port is currently blocked and cannot be used to forward
traffic or learn MAC addresses.
• L
istening: The port is currently in the listening mode. The port cannot
forward traffic nor can it learn MAC addresses.
• L
earning: The port is currently in the learning mode. The port cannot
forward traffic, however, it can learn new MAC addresses.
• F
orwarding: The port is currently in the forwarding mode. The port can
forward traffic and learn new MAC addresses
Port Role Each MST Bridge Port that is enabled is assig
ned a Port Role for each
spanning tree. The port role will be one of the following values: Root Port,
Designated Port, Alternate Port, Backup Port, Master Port, or Disabled
Port.
Designated Root Root Bridge for the selected MST instance. It is made up using the bridge
p
riority and the base MAC address of the bridge.
Designated Cost Displays cost of the port p
articipating in the STP topology. Ports with a lower
cost are less likely to be blocked if STP detects loops.
Designated Bridge Bridge Identifier of the bridge with the
Designated Port. It is made up using
the bridge priority and the base MAC address of the bridge.
Designated Port Port Identifier on the Designated
Bridge that offers the lowest cost to the
LAN. It is made up from the port priority and the interface number of the port.
Click Refresh to update the screen with the latest MST information.

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