Juniper EX2500-RMK-4POST Manual Do Utilizador
EX2500 Ethernet Switch Components
5
Chapter 1: EX2500 Ethernet Switch Description and Specifications
Fan operation and internal temperatures are monitored. If the air temperature
exceeds a desired threshold, the environmental monitor displays warning
messages.
exceeds a desired threshold, the environmental monitor displays warning
messages.
The FAN LED blinks if there is a failure of one or more fans.
Power Supplies
The EX2500 switch has two redundant 275W AC power supplies. Each internal
power supply has an individual IEC 320 power connector on the rear panel
(Figure 2 on page 4). The power cord attaches to a universal grounded AC power
source.
power supply has an individual IEC 320 power connector on the rear panel
(Figure 2 on page 4). The power cord attaches to a universal grounded AC power
source.
Each power supply can be connected to a separate AC circuit to mitigate the risk of
down time during a power failure. When used in a redundant configuration, the
dual power supplies have a load-sharing capability that allows each supply to
operate at approximately 50 percent of full load. Using redundant power can
minimize the power disruption during a power supply failure and extend the
expected lifetime of each supply by operating normally in a conservative power
mode.
down time during a power failure. When used in a redundant configuration, the
dual power supplies have a load-sharing capability that allows each supply to
operate at approximately 50 percent of full load. Using redundant power can
minimize the power disruption during a power supply failure and extend the
expected lifetime of each supply by operating normally in a conservative power
mode.
There is no power switch on the EX2500 switch; the switch unit powers on when
power is supplied through the power cord(s).
power is supplied through the power cord(s).
The SYS LED indicates the status of the power supplies. The LED blinks when only
one power cord is connected or if one power supply fails. The LED lights steadily
when both power cords are connected and operating.
one power cord is connected or if one power supply fails. The LED lights steadily
when both power cords are connected and operating.
Switch Ports
The EX2500 switch has 24 SFP+ ports, 2 management ports, and 1 console port.
SFP+ Ports
24 Small Form-Factor Pluggable (SFP+) ports are located on the front panel. These
ports accept approved optical SFP+ transceivers or direct access cables (DACs).
ports accept approved optical SFP+ transceivers or direct access cables (DACs).
Transceivers and DACs are not included with the EX2500 switch unit. Table 4 lists
the transceivers and DACs that are approved by Juniper Networks for use with the
switch.
the transceivers and DACs that are approved by Juniper Networks for use with the
switch.
CAUTION:
If a fan fails, the maximum operating temperature drops from
+40ºC
to
+35ºC
.
WARNING:
To reduce the risk of electric shock, use only power cords that have a
grounding path, and always connect the power cord to a properly grounded
power outlet.
power outlet.
Table 4: Approved EX2500 SFP+ Transceivers and DACs (1 of 2)
Model Number
Description
EX-SFP-10GE-SR
SFP+ 10GBASE-SR Short Range Optical Fiber Transceiver
EX-SFP-10GE-LR
SFP+ 10GBASE-LR Long Range Optical Fiber Transceiver