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Switch 4500 — Front View Detail 15
10BASE-T/
100BASE-TX Ports
The Switch 4500 has 24 or 48 auto-negotiating 10BASE-T/100BASE-TX
ports configured as Auto MDIX (cross-over). These ports automatically
provide the appropriate connection. Alternatively, you can manually set
these ports to 10BASE-T half-duplex, 10BASE-T full0-duplex, 100BASE-TX
half-duplex or 100BASE-TX full-duplex. The maximum segment length is
100
m (328 ft) over Category 5 twisted pair cable.
Gigabit Ports Switch 4500 10/100 Ethernet models support two simultaneous Gigabit
connections. Each switch has four Gigabit ports, arranged in two pairs
called “dual-personality combo port pairs.” Only one port in each pair
can be activeat a time.
The paired ports for the Switch 4500 26 Port and PWR 26 Port are:
■ 25 and 27
■ 26 and 28
The paired ports for the Switch 4500 50 Port and PWR 50 Port are:
■ 49 and 51
■ 50 and 52
By default, the ports are enabled as follows for the 26-Port switches:
■ Port 25 = active; Port 27 = inactive
■ Port 26 = active; Port 28 = inactive
By default, the ports are enabled as follows for the 50-Port switches:
■ Port 49 = active; Port 51 = inactive
■ Port 50 = active; Port 52 = inactive
To change which port is active, issue the undo shutdown command on
the inactive port. This will enable the previously inactive port and disable
its pair. Issuing this command will cause the switch to reboot.
A Gigabit connection can be either copper-based 1000Base-T or
SFP-based fiberoptic connection. On the Switch 4500 10/100 26 Port
unit, there are two SFP slots and two 1000Base-T ports. On the Switch
4500 PWR 26 Port, 50 Port, and PWR 50 Port models all the physical
Gigabit ports are SFP slots.