Reference Guide

668 | Quality of Service (QoS)
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Configure Port-based Rate Shaping
Configure Port-based Rate Shaping is supported only on the platforms s z
Rate shaping buffers, rather than drops, traffic exceeding the specified rate until the buffer is exhausted. If
any stream exceeds the configured bandwidth on a continuous basis, it can consume all of the buffer space
that is allocated to the port.
• Apply rate shaping to outgoing traffic on a port using the
rate shape command from INTERFACE
mode, as shown in Figure 37-5.
Figure 37-5. Applying Rate Shaping to Outgoing Traffic
Policy-based QoS Configurations
Policy-based QoS configurations consist of the components shown in Figure 37-6.
Figure 37-6. Constructing Policy-based QoS Configurations
FTOS Behavior: On the S-Series, rate shaping is effectively rate limiting because of its smaller buffer
size. On the S4810, rate shaping on tagged ports is slightly greater than the configured rate and rate
shaping on untagged ports is slightly less than the configured rate.
FTOS#config
FTOS(conf)#interface Tengigabitethernet 1/0
FTOS(conf-if)#rate shape 500 50
FTOS(conf-if)#end
FTOS#