Reference Guide

Quality of Service (QoS) | 723
Figure 40-5. Displaying your Rate Policing Configuration
Figure 40-6. ng How Your Rate Limiting Configuration Affects Traffic
Configuring Port-based Rate Shaping
Configure port-based rate shaping is supported on the S5000 switch.
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 command
rate shape from INTERFACE
mode, as shown in Figure 40-7.
• Apply rate shaping to a queue using the command
rate-shape from QoS Policy mode.
Figure 40-7. Applying Rate Shaping to Outgoing Traffic
Policy-based QoS Configurations
Policy-based QoS configurations consist of the components shown in Figure 40-8.
Dell Networking OS Behavior: On the S5000, rate shaping is effectively rate limiting because of its smaller buffer
size. On the S5000, rate shaping on tagged ports is slightly greater than the configured rate and rate shaping on
untagged ports is slightly less than configured rate.
Dell#show interfaces tengigabitethernet 1/2 rate police
Rate police 300 (50) peak 800 (50)
Traffic Monitor 0: normal 300 (50) peak 800 (50)
Out of profile yellow 23386960 red 320605113
Traffic Monitor 1: normal NA peak NA
Out of profile yellow 0 red 0
Traffic Monitor 2: normal NA peak NA
Out of profile yellow 0 red 0
Traffic Monitor 3: normal NA peak NA
Out of profile yellow 0 red 0
Traffic Monitor 4: normal NA peak NA
Out of profile yellow 0 red 0
Dell#config
Dell(conf)#interface tengigabitethernet 1/0
Dell(conf-if)#rate shape 500 50
Dell(conf-if)#end
Dell#