T640 Craft Interface Host Subsystem Leds; Figure 25: T640 Lcd In Alarm Mode; Table 13: T640 Host Subsystem Leds - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
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T640 Craft Interface Host Subsystem LEDs

44
Third and fourth lines—Status messages, which rotate at 2-second intervals. Some
conditions, such as removal or insertion of a system component, can interrupt the
messages.
To add a message that alternates every 2 seconds with the default status messages,
use the
set chassis display message
System Basics and Services Command Reference.
When a red or yellow alarm occurs, the LCD switches to alarm mode and reports the
alarm condition, as shown in Figure 25 on page 44.

Figure 25: T640 LCD in Alarm Mode

The lines in the display report the following information:
First line—Router name.
Second line—Number of active alarms.
Third and fourth lines—Individual alarm messages, with the most severe condition
shown first. The prefix on each line indicates whether the alarm is a red (
alarm.
For a list of alarm messages that can appear on the LCD, see "Troubleshooting Using the
T640 Chassis and Interface Alarm Messages" on page 165.
T640 Chassis Description on page 13
Troubleshooting Using the T640 Craft Interface LEDs
Replacing a T640 Craft Interface on page 196
Each host subsystem has three LEDs, located on the upper right of the craft interface,
that indicate its status. The LEDs labeled
in slot and the T-CB in slot
RE0
Routing Engine in slot
RE1
functions of the host subsystem LEDs.

Table 13: T640 Host Subsystem LEDs

Label Color
Red
FAIL
Green
OK
command. For more information, see the Junos OS
HOST0 show the status of the Routing Engine
. The LEDs labeled
CB0
and the T-CB in slot . Table 13 on page 44 describes the
CB1
State Description
On steadily Host is offline.
On steadily Host is online and is functioning normally.
R ) or yellow (
show the status of the
HOST1
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Y )