C HAPTER
8
QoS Support on the Catalyst 6500
The Cisco Catalyst 6500 series incorporates the industry’s leading platforms, with regard
to QoS features and functionality. The Catalyst 6500 Family of switches offers a broad
catalogue of mechanisms to help ensure the timely end-to-end delivery of mission-critical
and delay-sensitive applications. The Catalyst 6500 series is also capable of performing
these mechanisms in hardware, with no impact to the overall operation of the switch.
Because of the Catalyst 6500’s versatility, you can deploy it in all aspects of the campus
environment. By integrating additional hardware components, the Catalyst 6500 is capable
of transporting converged data, voice and real-time video across a LAN, MAN, or even
WAN environment. Features such as inline power for phone support, trust, and per-port
queuing and scheduling allow the Catalyst 6500 to be a viable solution for access layer
deployment. Dual-rate policing, Weighted Random Early Detection (WRED), and marking
extend the Catalyst 6500’s reach to the distribution and core layers, as well as the WAN edge.
Figure 8-1 shows how the Catalyst 6500 can be positioned in a small campus network.
Figure 8-1 Positioning the Catalyst 6500 Series in the Campus
Core and Distribution
Layer
IP Phones in
Auxiliary VLAN
Branch
Office
Access Layer
Catalyst 6500
with PFC
Catalyst 6500 with
MSFC and FlexWAN
Server
Farm
VLAN1 VLAN2 VLAN3
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