Netgear FSM750S – 48-Port 10/100 Mbps Managed Stackable Switch with Gigabit Ports Guida All'Installazione
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10/100 Mbps RJ-45 Ports
As Figures 2-1 and 2-3 shows, the FSM726S/FSM750S Managed Stackable Switch has 24 or 48 10/100
Mbps RJ-45 ports. These ports are auto-sensing 10/100 Mbps ports: When you insert a cable into an RJ-
45 port, the switch automatically ascertains the maximum speed (10 or 100 Mbps) and duplex mode (half-
or full-duplex) of the attached device. The 10/100 Mbps ports support only unshielded twisted-pair (UTP)
cable terminated with an 8-pin RJ-45 plug.
Mbps RJ-45 ports. These ports are auto-sensing 10/100 Mbps ports: When you insert a cable into an RJ-
45 port, the switch automatically ascertains the maximum speed (10 or 100 Mbps) and duplex mode (half-
or full-duplex) of the attached device. The 10/100 Mbps ports support only unshielded twisted-pair (UTP)
cable terminated with an 8-pin RJ-45 plug.
To simplify the procedure for attaching devices, all RJ-45 ports support Auto Uplink. This technology lets
you attach devices to the RJ-45 ports using either straight-through or crossover cables. When you insert a
cable into the switch’s RJ-45 port, the switch automatically:
you attach devices to the RJ-45 ports using either straight-through or crossover cables. When you insert a
cable into the switch’s RJ-45 port, the switch automatically:
• Senses whether the cable is a straight-through or crossover cable
• Determines whether the link to the attached device requires a “normal” connection (such as when
• Determines whether the link to the attached device requires a “normal” connection (such as when
connecting the port to a PC) or an “uplink” connection (such as when connecting the port to a
router, switch, or hub).
router, switch, or hub).
•
After ascertaining this information, the switch automatically configures the RJ-45 port to enable
communications with the attached device, without requiring user intervention. This way, Auto
Uplink technology compensates for setting uplink connections, while eliminating concern about
whether to use crossover or straight-through cables when attaching devices.
communications with the attached device, without requiring user intervention. This way, Auto
Uplink technology compensates for setting uplink connections, while eliminating concern about
whether to use crossover or straight-through cables when attaching devices.
Warning! You must use Link Aggregation (a.k.a. Port Trunking) to create multiple links between switches.
Using Auto Uplink to create multiple active paths between any two network devices can cause undesirable
loops in the network, resulting in an endless broadcast traffic that disables your network. Loops occur when
there are alternate routes between two network devices. In Figure 2-3, for example, connecting two RJ-45
ports on a NETGEAR Model FSM726S Stackable Managed Switch to a router containing a 4-port switch
creates a loop. Spanning Tree Protocol will prevent loops, if that advanced feature is enabled.
Using Auto Uplink to create multiple active paths between any two network devices can cause undesirable
loops in the network, resulting in an endless broadcast traffic that disables your network. Loops occur when
there are alternate routes between two network devices. In Figure 2-3, for example, connecting two RJ-45
ports on a NETGEAR Model FSM726S Stackable Managed Switch to a router containing a 4-port switch
creates a loop. Spanning Tree Protocol will prevent loops, if that advanced feature is enabled.
Figure 2-3 Warning! Creating Redundant Paths between Network Devices
Gigabit Ethernet Ports (RJ-45 and GBIC module bay)
Your NETGEAR Model
FSM726S/FSM750S Managed Stackable Switch has two Gigabit Ethernet ports
that can be used as either a 1000BASE-T port or as a GBIC module bay. The default setting for those ports
are for the built-in RJ-45 connector to be active, but they can be independently configured to activate either
the RJ-45 or the GBIC module, enabling multiple combinations of fiber and copper connections. The
Gigabit Ethernet ports provide a full-duplex 1000 Mbps (1 Gbps) connection that effectively doubles
throughput to 2 Gbps.
are for the built-in RJ-45 connector to be active, but they can be independently configured to activate either
the RJ-45 or the GBIC module, enabling multiple combinations of fiber and copper connections. The
Gigabit Ethernet ports provide a full-duplex 1000 Mbps (1 Gbps) connection that effectively doubles
throughput to 2 Gbps.