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RCB Function
The RCB runs Junos OS. Software processes that run on the RCB maintain the routing tables, manage the
routing protocols used on the router, control the router interfaces, control some chassis components, and
provide the interface for system management and user access to the router.
RCB Slots
The user can install one or two RCBs in the router. Each RCB is a combined Routing Engine and Control
Board in one unit. A USB port on the RCB accepts a USB storage device that enables you to load Junos
OS. You can install the RCBs into the front of the chassis in vertical slots labeled 0 and 1. If two RCBs are
installed, one functions as the master and the other acts as the backup. If the master RCB fails or is removed
and the backup is configured appropriately, the backup takes over as the master. If no RCB is installed in
a slot, install a blank panel in the slot.
A minimum of one RCB must be installed in either slot 0 or slot 1 at all times.
CAUTION:
replacement or blank panel to install.
RCB Front Panel
Table 45 on page 126
describes the Routing and Control Board (RCB).
Figure 48: RCB Front
View
If one of the RCBs fails, do not remove the failed RCB until you have a
Figure 49: RCB
(REMX2008–X8-64G-LT) Front View
REMX2008-X8-64G-LT
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5
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10
Figure 50: RCB
(REMX20008–X8-128G) Front View
REMX2008-X8-128G
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5
13
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125
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