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M40e and M160 Router Redundant Host Modules
On M40e and M160 routers, the host module consists of a paired Routing Engine
and MCS. One pair functions as master, while the other stands by as a backup
should the master Routing Engine fail. (See Figure 185 and "Redundancy
Connection for an M40e or M160 Router" on page 472.)
Figure 185: M40e and M160 Router Redundant Host Modules
M40e router rear
S F M 0
S F M 1
M C S 0
MCS0
R E 0
RE0
R E 1
M C S 1
RE1
MCS1
Miscellaneous
Control Subsystem
P C G 0
Routing
P C G 1
Engines
Miscellaneous
Control Subsystem
Understanding Redundancy for the Routing Engine, Host Module, and Host Subsystem
Chapter 36: Host Redundancy Overview
M160 router rear
S F M 0
S F M 1
M S C 0
R E 0
R E 1
M S C 1
S F M 2
S F M 3
MCS0
P C G 0
RE0
P C G 1
RE1
MCS1
!
467
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