The routing matrix is the first multichassis product from Juniper Networks. The T640 and T320 routing platforms were the first core routers that provided scalable bandwidth and intelligent networking features with a capacity of 80 to 640 gigabits per second (Gbps) of throughput. A key part of the T-series design was the ability to scale individual T640 routing nodes to 2.5 terabits of bandwidth by combining them in a multichassis configuration. Such scalability is now available with the routing matrix.
The physical system of a routing matrix consists of one TX Matrix platform and from one to four T640 routing nodes, as shown in Figure 14. A key element of the routing matrix design is the ability to migrate existing T640 routing nodes and connect them with the TX Matrix platform through fiber-optic cables and Switch Interface Boards (SIBs).
Figure 14: Routing Matrix Architecture
The TX Matrix platform connection between the T640 routing nodes uses a scalable, three-stage switch fabric. This system architecture provides terabit bandwidth expansion capacity and eliminates the use of subscriber line cards to connect devices within points of presence (POPs). As a result, the primary application for the routing matrix is to collapse aggregation and core layers in large POPs and central offices.
The routing matrix appears as a single router to the operator and utilizes the existing JUNOS CLI for configuration and management. To manage this multichassis system, some enhancements have been made to the CLI that allow you to select the amount of output you wish to receive when you issue operational commands. You can specify the entire routing matrix, the TX Matrix platform, a specific T640 routing node and its Flexible PIC Concentrators (FPCs), or a combination thereof.
Similarly, you can limit which portions of the routing matrix are modified during configuration or maintenance procedures (for example, performing software upgrades or halting Routing Engines).
Within the CLI, the TX Matrix platform is referenced by the term switch-card chassis (SCC) and the T640 routing nodes are known as line-card chassis (LCCs). As a result, you can use the scc and lcc options when you issue configuration and operational commands on the TX Matrix platform. If you do not specify one of these options, the generic form of a statement or command provides modification or display output for the entire routing matrix.
 |
Note: This guide usually refers to LCCs as T640 routing nodes and the SCC as the TX Matrix platform. |
 | Copyright © 2008, Juniper Networks, Inc. All rights reserved. Trademark Notice. | |