ASR 5000 Hardware Platform Overview
â–„ ASR 5000 Installation Guide
The following subsections describe each bus.
320 Gbps Switch Fabric
The System Management Card (SMC) is an IP-based (packetized) switch fabric that provides a transport path for user
data throughout the system. Its 320 Gbps switch fabric establishes inter-card communication between the SMCs and
other application cards within the chassis along with their associated line cards.
32 Gbps Control Bus
The Control Bus features redundant 32 Gbps Ethernet paths that interconnect all control and management processors
within the system. The bus uses a full-duplex Gigabit Ethernet (GigE) switching hierarchy from both SMCs to each of
the 14 application card slots in the chassis. Each application card is provisioned with a GigE switch to meet its specific
needs. This bus also interconnects the two SMC modules.
System Management Bus
The System Management Bus supports management access to each component within the chassis. It provides a
communication path from each SMC to every card in the system with a 1 Mbps transfer rate to each card. This allows
the SMCs to manage several low-level system functions (such as, supplying power, monitoring temperature, board
status, pending card removals, data path errors, redundant/secondary path switchovers, card resets and failovers).
Additionally, the System Management Bus monitors and controls the fan trays, PFUs, and alarming functions.
280 Gbps Redundancy Bus
The Redundancy Bus consists of multiple, full-duplex serial links providing packet processing card-to-line card
redundancy through the chassis’ Redundancy Crossbar Cards (RCCs) as shown below.
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