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TX Matrix Control Boards Description


Each Control Board works with an adjacent Routing Engine to provide control and monitoring functions for the TX Matrix router. These functions include determining Routing Engine mastership, controlling power and reset for the other TX Matrix router components, monitoring and controlling fan speed, and monitoring system status.

You can install up to two Control Boards in the TX Matrix router. Control Boards install into the upper rear of the chassis in the slots labeled CB0 and CB1. Each Control Board requires a Routing Engine to be installed in the adjacent slot. CB0 installs above RE0, and CB1 installs below RE1. Control Boards cannot function if a Routing Engine is not present in the adjacent slot.

If two Control Boards are installed, one functions as the master and the other as its backup. If the master fails or is removed, the backup restarts and becomes the master. If the host system is redundant, the backup is hot-removable and hot-insertable, but the master is hot-pluggable. A that is not redundant is hot-pluggable.

The TX Matrix router supports the Control Boards listed in Table 1.


The LCC-CB is required for both RE-DUO-C1800-8G and RE-DUO-C1800-16G Routing Engines.

Table 1: TX Matrix Supported Control Boards


Model Number

CLI Output

First Supported Junos OS Release

TX Series (TX-CB)

TX Matrix Control Board (TX-CB) Description


Control Board (CB-TX)


Line-card chassis Control Board (LCC-CB)

TX Matrix Line-Card Chassis Control Board (LCC-CB) Description


LCC Control Board