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Figure 1
Cisco IOS Software and Cisco Catalyst OS Positioning
Architecture Comparison
The Cisco Catalyst 6500 offers a high-performance blend of Layer 2/3/4+ technology. Independent of the software
model chosen, the forwarding intelligence of the system is performed in the following hardware: the Supervisor (with
switch processor) baseboard, the PFC daughter card, and the MSFC (route processor) daughter card (Figure 2).
Distribution Layer
Catalyst OS/
Cisco IOS
Cisco IOS
Core
Cisco IOS
Cisco IOS
WAN
ISP
ISP
Server Farm/
Data Center
Access Layer Catalyst OS
WAN Edge
E-Commerce/Data Center
Server Server Server
Laptop Laptop Laptop
Cisco
Catalyst 6500
with MSFC
Cisco
Catalyst
6500
Cisco
CallManager
Server Server Server
Cisco IOS
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