Routing Matrix with a TX Matrix Plus Router System Control Plane Architecture

The routing matrix contains two control planes. All master Routing Engines in the TX Matrix Plus router and T1600 routers are on one control plane; all backup Routing Engines are on another control plane (see Figure 1). To manage the Routing Engines on a control plane, you must be logged into the Routing Engine in the TX Matrix Plus router on that control plane. For example, you must be logged into the backup Routing Engine in the TX Matrix Plus router to upgrade the software of all backup Routing Engines in the routing matrix.

Figure 1: Routing Matrix Routing Engine Connections

The TX Matrix Plus Routing Engine connects to a high-speed switch through a 10-Gbps link within the host subsystem. The switch provides a 1-Gbps link to each T1600 Routing Engine. The 1-Gbps links are provided through the UTP Category 5 Ethernet cable connections between the TXP-CBs and the LCC-CBs in the T1600 routers. (For more information about connecting TXP-CBs to LCC-CBs, see Control Plane Connections from the TX Matrix Plus Router to the T1600 Routers.)

The kernel synchronization process running on each T1600 Routing Engine synchronizes the forwarding table on the TX Matrix Plus Routing Engine with the forwarding table on the T1600 router. The Junos kernel running on each T1600 Routing Engine copies its forwarding table to all Packet Forwarding Engines in the T1600 router.

Figure 2 illustrates the control plane architecture.

Figure 2: Routing Matrix Control Plane Architecture