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ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter1 Product Overview
Layer 3 Enabled ATM Switch Router Hardware Overview
Layer 3 Enabled ATM Switch Router Hardware (Catalyst 8510 MSR and
LightStream 1010)
The Catalyst 8510 MSR and LightStream 1010 ATM switch routers both use a five-slot, modular chassis
featuring the option of dual, fault-tolerant, load-sharing AC or DC power supplies. A single,
field-replaceable ATM switch processor module supports both the 5-Gbps shared memory and the fully
nonblocking switch fabric. The processor also supports the featur e card and high performance reduced
instruction set computing (RISC) processor (CPU) that provides the central intelligence for the device.
The remaining slots support up to four hot-swappable carrier m odules. Each carrier module can hold up
to two hot-swappable port adapters for a maximum of eight port adapters per switc h, supporting a wide
variety of desktop, backbone, and wide-area interfaces.
The ATM switch provides switched ATM connections to individual workstations, servers, LAN
segments, or other ATM switches and routers using fiber-optic, unshielded twisted-pair (UTP), an d
coaxial cable.
Note The ATM switch processor and port adapters can be installed in the Catalyst5500 switch chassis. In the
Catalyst 5500 switch chassis the processor must be installed in slot number 13 and the port adapters in
slot numbers 9though 12. The examples in this guide assume that the ATM switch router is in its own
chassis, with the processor in slot number 2 and the port adapters in slot numbers 0, 1, 3, and 4.

Processor and Feature Card Models (Catalyst 8510 MSR and LightStream 1010)

The Catalyst 8510 MSR and LightStream 1010 ATM switch routers are equipped with one of the
following combinations of processor and feature card:
•ASP-B with feature card per-class queuing (FC-PCQ) or feature card per-flow queuing (FC-PFQ)
•ASP-C with FC-PCQ or FC-PFQ
•Multiservice ATM switch route processor
ASP-B with FC-PCQ and ASP-C with FC-PCQ are functionally equivalent, offering the same features
and performance. FC-PFQ, however, provides an enhanced feature set, including advanced traffic
management. ASP-B and ASP-C, equipped with FC-PFQ, also provide identical functionality for ATM
applications. However, ASP-C with FC-PFQ provides the additional capability for supporting both
ATMand Layer 3 switching on the same platfor m. ASP-C with FC-PFQ and the multiservice ATM
switch route processor, used in the Catalyst8510 MSR, are identical.
FC-PCQ provides a subset of the ATM Forum traffic management features provided by FC-PFQ, as
described in Tabl e 1-1.
Table1-1 FC-PCQ and FC-PFQ Feature Comparison
Feature FC-PCQ FC-PFQ
Traffic classes CBR1, RT-VBR2, NRT-VBR3,
ABR4 (EFCI5 and RR6), UBR7
CBR, RT-VBR, NRT-VBR, ABR
(EFCI and RR), UBR
Output queuing Four classes per port Per-VC or per-VP
Output scheduling Strict priority Strict priority, rate scheduling, and
WRR8
Intelligent early packet
discard
Multiple fixed thresholds Multiple, weighted, dynamic
thresholds