The route processor
(RP) card is the system controller for the Cisco CRS Carrier Routing System. It
performs route processing and distributes forwarding tables to the MSCs. The RP
provides a control path to each MSC, performs system-monitoring functions, and
contains hard disks for system and error logging.
Although the routing
system contains two RP cards, only one RP is active at a time. The other RP
operates in standby mode, ready to assume control if the active RP fails. See
Active and Standby Arbitration
for information on how the system determines which RP is active and which is
The RP card provides
route processing, alarm, fan and power supply controller function in the Cisco
CRS Carrier Routing System. The RP card controls fans, alarms, and power
supplies through the use of an
communication link from the RP card to each fan tray/power supply.
Two RP cards are
required per chassis for redundancy—one is
active , and the
standby . An RP
card can be inserted in either of the two dedicated slots in the chassis.
illustrates the route processor card.
Figure 1. Route Processor
Details on the
faceplate of the RP card are shown in
and are described in
The Cisco IOS XR
Getting Started Guide, available online at
Figure 2. Details on the
Front Panel of the Route Processor Card
Table 1 Description of RP
An IDE hard
drive is used to gather debugging information, such as core dumps from the RP
or MSCs. It is typically powered down and activated only when there is a need
to store data.
resides in a SIMM module on the RP card. The RP can be configured with 2 or 4
GB of memory.
flash slots provide support for 2Gb and 4Gb of flash subsystem storage, each.
One of the PCMCIA flash subsystems is accessible externally and removable, and
allows you to transfer images and configurations by plugging in a PCMCIA flash
card. The other PCMCIA flash subsystem is fixed to the RP, for permanent
storage of configurations and images.
dual-processing CPU symmetric multiprocessor (SMP) performs route processing.
The CPU also serves as the MSC service processor (SP), and monitors the RP
temperature, voltages, power supply margining (during factory test), and ID
form-factor pluggable (SFP) modules support external Gigabit Ethernet
connections for multi-chassis systems.
10/100/1000 copper Ethernet port is available for providing connectivity to
network management systems.
Mbps Fast Ethernet (FE) midplane connections connect each MSC in the chassis to
both RP cards. These FE connections are traces in the midplane. There are also
FE connections to the fans power supplies. These connections all form part of
the control plane.