Data Processing Card - Cisco ASR 5500 Installation Manual

ASR 5500 Hardware Platform Overview

Data Processing Card

The ASR 5500 chassis supports multiple DPCs and/or UDPCs in the rear facing slots of the chassis.
The DPC/UDPC has two identical CPU subsystems with each containing:
 96 GB of RAM
 NPU for session data flow offload
 Crypto offload engines located on a daughter card
DPC/UDPCs manage subscriber sessions and control traffic.
Front Cards
The ASR 5500 supports two types of front-mounted cards:

Fabric and Storage Card (FSC)

System Status Card (SSC)
The crossbars that comprise the switching fabric are on the FSCs. The ASR 5500 supports multiple FSCs. Each FSC
provides six physical fabric planes. When fully populated, there are 24 fabric planes in the system. A physical fabric
plane provides full-mesh connectivity between all traffic sources.
Fabric and Storage Card (FSC)
The ASR 5500 chassis supports multiple FSCs in front facing slots of the chassis.
The FSC features:
 Fabric cross-bars providing in aggregate:
 120 Gbps full-duplex fabric connection to each MIO/UMIO
 60 Gbps full-duplex fabric connection to each DPC/UDPC
 Two 2.5" serial attached SCSI (SAS), 200GB solid state drives (SSDs) with a 6 Gbps SAS connection to each
MIO/UMIO.
Every FSC adds to the available fabric bandwidth to each card. Each FSC connects to all MIO/UMIOs or DPC/UDPCs,
with a varying number of links depending on the MIO/UMIO or DPC/UDPC slot. Three FSCs provide sufficient
bandwidth while the fourth FSC supports redundancy.
Important:
presence of a fourth failed FSC. Four FSCs must be installed for normal operation.
Important:
The ASR 5500 uses an array of solid state drives (SSDs) for short-term persistent storage. The RAID 05 configuration
has each pair of drives on an FSC striped into a RAID 0 array; all the arrays are then grouped into a RAID 5 array. Each
FSC provides the storage for one quarter of the RAID 5 array. Data is striped across all four FSCs with each FSC
providing parity data for the other three FSCs. The array is managed by the master MIO/UMIO.
Although four FSCs are required for redundancy, the system can operate with three FSCs in the
The SSDs are not field replaceable units (FRUs). If an SSD fails the FSC must be replaced.
Card Types ▀
ASR 5500 Installation Guide ▄
21