Understanding the Host Module ! 341
Chapter 25
Monitoring the Host Module
You monitor and maintain the M40e and M160 router host module—the Routing
Engine and the Miscellaneous Control Subsystem (MCS)—which constructs routing
tables, performs system management functions, and generates the SONET/SDH
clock signal for SONET/SDH interfaces. (See Table 82.)
Table 82: Checklist for Monitoring the Host Module
Understanding the Host Module
Purpose Inspect the host module to ensure that the Routing Engine and Miscellaneous
Control Subsystem (MCS) function properly.
What Is a Host
Module
The host module is present on M40e and M160 routers. The host module constructs
routing tables, performs system management functions, and generates the
SONET/SDH clock signal for SONET/SDH interfaces.
The host module is comprised of two components: the Routing Engine and the
MCS. For a host module to function, both of these components must be installed
and operational.
Monitor Host Module Tasks Command or Action
Understanding the Host Module on page 341
Checking the Host Module Status on page 344
show chassis craft-interface
Checking the Routing Engine Status on page 345
show chassis routing-engine
Checking the MCS Status on page 346
show chassis environment mcs
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