Functional Description; Switch Fabric - Cisco ASR 9000 series Reference Manual

Route Switch Processor Card
detected and activated after the ACO activation, the ACO function is deactivated to notify the user of the
arrival of the new alarm(s). In this case, the ACO LED will turn off and any active alarms are again
indicated by driving their alarm output contacts to the alarm state.
Lamp Test - When the Lamp Test button is pushed, the RSP status LED, line card status and port LEDs, and
Fan Tray LEDs light until the button is released. The LED matrix display is not affected.

Functional Description

The switch fabric and route processor functions are combined on a single RSP card. The RSP card also
provides shared resources for backplane Ethernet, timing, and chassis control. Redundant RSP cards
provide the central point of control for chassis provisioning, management, and data-plane switching.

Switch Fabric

The switch fabric portion of the RSP card links the Ethernet line cards together. In the ASR 9000, the
switch fabric is configured as a single stage of switching with multiple parallel planes. The fabric is
responsible for getting packets from one line card to another, but has no packet processing capabilities.
Each fabric plane is a single-stage, nonblocking, packet-based, store-and-forward switch. To manage
fabric congestion, the RSP card also provides centralized Virtual Output Queue (VOQ) arbitration.
The switch fabric is capable of delivering 80 Gbit/s per slot.
The switch fabric is 1+1 redundant, with one copy of the fabric on each redundant RSP card. Each RSP
card carries enough switching capacity to meet the router throughput specifications, allowing for full
redundancy.
Figure 2-4
Cisco ASR 9000 Aggregation Services Router Overview and Reference Guide
2-8
D R A F T — C I S C O C O N F I D E N T I A L
shows the switch fabric interconnections.
Chapter 2 Functional Description
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