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Chapter 6
M40e Internet Router Overview
The M40e Internet router provides a dense, highly redundant platform primarily for
dedicated access aggregation at the edge as well as for mid-size core IP networks.
The M40e router supports the JUNOS software which provides router configuration
and monitoring. (See Figure 6.)
Figure 6: M40e Router
The M40e router shares the same chassis and many of the same components as the
M160 Internet router. It accepts both AC and DC power supplies. The M40e router
can have up to two Switching and Forwarding Modules (SFMs). The SFMs contain
the Internet Processor II application-specific integrated circuit (ASIC) and two
Distributed Buffer Manager ASICs, and make forwarding decisions, distribute
packets throughout memory, and forward notification of outgoing packets.
Craft interface
Front support posts
Center rack-mounting ear
CIP
ESD point
Cable
management
system
Air filter
R
P
C
G
0
S
F
M
0
S
F
M
1
M
C
S
0
R
E
0
R
E
1
M
C
S
1
P
C
G
1
PCGs
Routing Engines
MCS 0
MCS 1
SFMs
Do not install an SFM in this slot
D
o
n
o
t in
s
ta
ll a
n
S
F
M
in
th
is
s
lo
t
1270
Circuit
breakers
Grounding
points
Power supplies
FPCs
RearFront