M40e SFM LEDs
Two LEDs indicate SFM status. There is a green one labeled
OK
and an yellow one labeled
FAIL
. Table 5 on page 23 describes the LED states.
Figure 12: M40e Switching and Forwarding Module
Table 5: States for M40e SFM LEDs
Description
State
Color
Label
SFM is functioning normally.
On steadily
Green
OK
SFM is starting up.
Blinking
SFM has failed.
On steadily
Yellow
FAIL
Related
Documentation
M40e Switching and Forwarding Module (SFM) Description on page 20
•
•
Installing an SFM in an M40e Router on page 207
•
M40e Chassis Description on page 8
M40e Host Module Description
The host module constructs routing tables, performs system management functions,
and generates the SONET/SDH clock signal for SONET/SDH interfaces. It consists of a
paired Routing Engine and Miscellaneous Control Subsystem (MCS).
For a host module to function, both of its components—Routing Engine and MCS—must
be installed and operational. One or two host modules can be installed into the midplane
from the rear of the chassis, as shown in “M40e Chassis Description” on page 8. The
Routing Engine slot labeled
RE 0
is below the MCS slot labeled
MCS 0
and the
RE 1
slot
is above the
MCS 1
slot.
If two host modules are installed, both are powered on, but only one is active (the master);
the second host module is in standby mode and performs no functions. By default, the
master host module is the one with components installed in the
RE 0
and
MCS 0
slots.
To change the default master Routing Engine, include the appropriate
[edit chassis redundancy routing-engine]
statement in the configuration, as described in
the section about Routing Engine redundancy in the
Junos OS System Basics Configuration
Guide
.
23
Copyright © 2010, Juniper Networks, Inc.
Chapter 2: M40e Hardware Components
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