Juniper Networks M160 manual Miscellaneous Control Subsystem MCS, Routing Engine

Hardware Component Overview

document that depict the Routing Engine. These differences do not affect Routing Engine installation and removal or functionality.

For specific information about Routing Engine components (for example, the amount of SDRAM), issue the show chassis routing-enginecommand.

NOTE: If two Routing Engines are installed, they must both be the same version.

Figure 9: Routing Engine

Routing Engine 333	Routing Engine 600
Extractor clip	Extractor clip

		PC
		CA
		RD
		RESET
LED		HD
PC card slot		PC card slot
	Extractor clip	LED

Extractor clip

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Miscellaneous Control Subsystem (MCS)

The Miscellaneous Control Subsystem (MCS) works with its companion Routing Engine to provide control and monitoring functions for router components. It also generates a clock signal for the SONET/SDH interfaces on the router.

One or two host modules (paired MCS and Routing Engine) can be installed into the midplane from the rear of the chassis, as shown in Figure 3. Only one host module is active at a time, with the optional second host module in standby mode. For more information about host module interdependence and redundancy, see Host Module on page 22.

The MCS performs the following functions:

Monitoring and control of router components—The MCS collects statistics from all sensors in the system. When it detects a failure or alarm condition, it sends a signal to the Routing Engine, which generates control messages

Host Module 25