Juniper MX Series

MX2020

The release of this book has been timed with a new product announcement from Juniper. The MX2020 is a new router in the MX Series that’s designed to solve the 10G and 100G high port density needs of Content Service Providers (CSP), Multisystem Operators (MSO), and traditional Service Providers. At a glance, the MX2020 supports 20 line cards, 8 switch fabric boards, and 2 routing engines. The chassis takes up an entire rack and has front-to-back cooling.

Architecture

The MX2020 is a standard backplane-based system, albeit at a large scale. There are two backplanes connected together with centralized switch fabric boards (SFB). The routing engine and control board is a single unit that consumes a single slot, as illustrated in Figure 1-39 on the far left and right.

Figure 1-39. Illustration of MX2020 architecture

The FPC numbering is the standard Juniper method of starting at the bottom and moving left to right as you work your way up. The SFBs are named in the same method starting with zero starting on the left and going all the way to seven on the far right. The routing engine and control boards are located in the middle of the chassis on the far left and far right.

Switch Fabric Board

Each backplane has 10 slots that are tied into eight SFBs in the middle of the chassis. Because of the high number of line cards and PFEs the switch fabric must support, a new SFB was created specifically ...