Host Subsystem Components; Routing Engine Description - Juniper MX204 Hardware Manual

CHAPTER 4

Host Subsystem Components

MX204 Routing Engine Description
Routing Engine Functions
Copyright © 2018, Juniper Networks, Inc.
MX204 Routing Engine Description on page 15
MX204 Routing Engine LEDs on page 17
The host subsystem provides routing protocol processes, as well as software processes
that control the router's interface, the chassis components, system management, and
user access to the router. These routing processes run on top of a kernel that interacts
with the Packet Forwarding Engine. The MX204 host subsystem consists of a single
built-in Routing Engine.
This topic covers:
Routing Engine Functions on page 15
Routing Engine Components on page 16
Routing Engine Front Panel on page 16
Routing Engine Interface Ports on page 16
The Routing Engine is built-in on the MX204 baseboard and cannot be replaced. The
Routing Engine performs all route-processing functions, and provides performs chassis
control and management plane functionality. The Routing Engine also provides control
plane functions.
The Routing Engine supports the following functionalities to manage the operation of
the router:
System control functions such as environmental monitoring
Routing Layer 2 and Layer 3 protocols
Communication to components such as line cards, power supply, and cooling system
Transparent clocking
Alarm and logging functions
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