QoS Trust Boundaries in the LAN

Benefits of applying QoS at the edge of the network:

• Provides the ability to classify and mark traffic immediately

• Minimizes upstream congestion

• Frees up router processing power

Benefits of applying QoS at the edge of the network:

• Provides the ability to classify and mark traffic immediately

• Minimizes upstream congestion

• Frees up router processing power

You should apply QoS as close to the source of the traffic as possible.

These are some of the benefits of applying QoS at the edge (or close to the source of the traffic):

■ Provides the ability to classify and mark traffic immediately

■ Reduces CPU use of upstream devices, thus reducing the possibility that priority traffic, such as voice, is delayed at some point further in the network

■ Frees up router processing power, as Catalyst switches perform QoS operations in hardware (with no incremental CPU load)

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