M7i Routing Engine LEDs
Four LEDs—A green LED labeled
HDD
, a blue LED labeled
MASTER
, a red LED labeled
FAIL
, and a green LED labeled
ONLINE
indicate Routing Engine status. Table 6 on page 21
describes the LED states.
Table 6: States for Routing Engine LEDs
Description
State
Color
Label
There is read/write activity on the PC card.
Blinking
Green
HDD
Routing Engine is functioning as master. On an M7i
router, this LED is always lit.
On steadily
Blue
MASTER
Routing Engine is not operational.
On steadily
Red
FAIL
Routing Engine is running normally.
On steadily
Green
ONLINE
Related
Documentation
M7i Routing Engine Description on page 18
•
•
M7i Router Description on page 3
•
M7i Router Physical Specifications on page 159
•
M7i Router Power Requirements on page 163
M7i Power Supply Overview
•
M7i Power System Description on page 21
•
M7i AC Power Supply on page 22
•
M7i DC Power Supply on page 23
•
M7i Power Supply LEDs on page 24
M7i Power System Description
The router uses either AC or DC power. You can install one or two load-sharing power
supplies at the bottom rear of the chassis, as shown in Figure 2 on page 6. The power
supplies connect to the midplane, which distributes power to router components
according to their individual voltage requirements.
For full redundancy, two power supplies are required. When the power supplies are
installed and operational, they automatically share the electrical load. If a power supply
stops functioning for any reason, the second power supply instantly begins providing all
the power the router needs for normal functioning. It can provide full power indefinitely.
An enable control signal on the output connector of each power supply ensures that the
supply is fully seated into the router midplane before the supply can be turned on. The
enable pin prevents a user-accessible energy hazard, so there is no interlocking
21
Copyright © 2010, Juniper Networks, Inc.
Chapter 2: M7i Hardware Components
All manuals and user guides at all-guides.com