3com 3824 사용자 설명서
Switch — Front View Detail
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using SFP transceivers to provide connectivity between the Switch and
remote 1000 Mbps workgroups or to create a high capacity aggregated
link backbone connection.
remote 1000 Mbps workgroups or to create a high capacity aggregated
link backbone connection.
The SFP ports are capable of auto-negotiating flow control. 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 and the flow control setting can be manually configured.
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 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. The Switch 3812 and Switch 3824 have
a DB-9 serial connector and need a serial cable to connect to your PC.
The Switch 3848 has an RJ-45 serial port and is supplied with an RJ-45 to
DB-9 cable.
local out-of-band management. The Switch 3812 and Switch 3824 have
a DB-9 serial connector and need a serial cable to connect to your PC.
The Switch 3848 has an RJ-45 serial port and is supplied with an RJ-45 to
DB-9 cable.
The standard null modem cable is set to autobaud (up to a maximum of
19,200 baud), 8 data bits, no parity and 1 stop bit.
19,200 baud), 8 data bits, no parity and 1 stop bit.
LEDs
lists LEDs visible on the front of the Switch, and how to read their
status according to color. For information on using the LEDs for problem
solving, see
solving, see
Table 4 LED behavior
LED
Color
Indicates
Port Status/Packet LEDs
Green
A high speed (1000 Mbps) link is present, and the port
is enabled.
is enabled.
Green flashing
A high speed (1000 Mbps) link is present and active.
Yellow
A low speed (10/100 Mbps) link is present, and the
port is enabled.
port is enabled.
Yellow flashing
A low speed (10/100 Mbps) link is present and active.
Green for one
second, Amber
for one second,
then OFF until
operational.
second, Amber
for one second,
then OFF until
operational.
POST in operation, all LEDs perform a one second lamp
test.
test.
Alternate yellow
then green
flashing (fast)
then green
flashing (fast)
A port has failed a loop back test during POST.
Alternate yellow
then green
flashing
then green
flashing
A link is present but the port has been disabled.
dua1740-0aaa03.book Page 15 Thursday, December 23, 2004 9:23 PM