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Product Architecture

The JUNOS software provides IP routing protocol software as well as software for interface, network, and chassis management. The JUNOS software runs on all Juniper Networks J-series, M-series, MX-series, and T-series routing platforms.

J-series Services Routers (J2300, J4300, and J6300) are deployed at the remote edge of distributed networks.
Most M-series routers are deployed in small and medium cores in peering, route reflector, data center applications; or at the IP or Multiprotocol Label Switching (MPLS) edge to support high-performance Layer 2 and Layer 3 services. All M-series routers have redundant power and cooling and the M10i, M20, M40e, M120, M160, and M320 routers have fully redundant hardware, including Routing Engines, switch interface components, and packet forwarding components. The M120 router also supports Forwarding Engine Board (FEB) failover. In the event of a FEB failure, a backup FEB can quickly take over packet forwarding.
The MX-series Ethernet Services Routers are Ethernet-optimized edge routers that provide both switching and carrier-class Ethernet routing. The MX-series routers support two types of Dense Port Concentrators (DPCs) with built-in Ethernet ports: Gigabit Ethernet 40-port and 10-Gigabit Ethernet 4-port.
T-series routing platforms (T320 router, T640 router, and TX Matrix platform) are deployed at the core of provider networks. These routing platforms have fully redundant hardware, including power and cooling, Routing Engines, and Switch Interface Boards.
A routing matrix is a multichassis architecture composed of one TX Matrix platform and from one to four T640 routing nodes. From the perspective of the user interface, the routing matrix appears as a single router. The TX Matrix platform controls all the T640 routing nodes on the routing matrix.

For more information about the architecture in your routing platform, see the hardware guide for your routing platform.

This section provides an overview of the router hardware for routing platforms and discusses the relationships between the hardware and software:

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