Host Subsystem Components; Mx2020 Host Subsystem Description - Juniper MX2020 Hardware Manual

3d universal edge router

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Table of Contents

Host Subsystem Components

MX2020 Host Subsystem Description on page 57

MX2020 CB-RE Description on page 59

RE-MX2000-1800x4 CB-RE Description on page 61

MX2020 CB-RE LEDs on page 62

MX2020 Switch Fabric Board Description on page 64

MX2020 Switch Fabric Board LED on page 65

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 (PFE). The CB-RE provides control plane functions.

The user can install one or two host subsystems on the router. Each host subsystem

functions as a unit; the Control Board and Routing Engine (CB-RE).

Install two CB-RE host subsystems for redundant protection. If you

install only one CB-RE host subsystem, you can install it in slot

If one of the CB-REs fails, do not remove the failed CB-RE until

you have a replacement or blank panel to install.