Краткое Руководство По Установке для 3com 4500
Switch 4500 — Front View Detail
15
“dual-personality combo port pairs.” Only one port in each pair can be activeat a
time.
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.
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.
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.
Two 1000Base-T SFP transceivers are included with these units. These SFP
transceivers can be inserted in any of the four SFP slots to provide copper Gigabit
connectivity. If you install these in the inactive ports, then you will need to issue
the undo shutdown command on those ports to make them active.
transceivers can be inserted in any of the four SFP slots to provide copper Gigabit
connectivity. If you install these in the inactive ports, then you will need to issue
the undo shutdown command on those ports to make them active.
SFP (Small Form Factor Pluggable, or mini-GBIC) ports support fiber Gigabit
Ethernet short-wave (SX), long-wave (LX), long-haul (LH70) and copper (T) SFP
Transceivers in any combination. This offers you the flexibility of using SFP
transceivers to provide connectivity between the Switch and remote 1000 Mbps
workgroups.
Ethernet short-wave (SX), long-wave (LX), long-haul (LH70) and copper (T) SFP
Transceivers in any combination. This offers you the flexibility of using SFP
transceivers to provide connectivity between the Switch and remote 1000 Mbps
workgroups.
The default state for these ports is auto-negotiation enabled, where the speed,
duplex and flow control modes are negotiated. As the speed and duplex modes
are fixed by the media type, only the flow control is negotiated with the link
partner. Alternatively, auto-negotiation can be disabled (except 1000BASE-T which
auto-negotiation is mandatory) and the flow control setting can be manually
configured.
duplex and flow control modes are negotiated. As the speed and duplex modes
are fixed by the media type, only the flow control is negotiated with the link
partner. Alternatively, auto-negotiation can be disabled (except 1000BASE-T which
auto-negotiation is mandatory) and the flow control setting can be manually
configured.
Console Port
The console port allows you to connect a terminal and perform remote or local
out-of-band management. As the console port on the Switch is an RJ-45 port, you
out-of-band management. As the console port on the Switch is an RJ-45 port, you