Ethernet Switch CLI Reference Guide
41
CHAPTER 8
Bandwidth Commands
Use these commands to configure the maximum allowable bandwidth for incoming or
outgoing traffic flows on a port.
Bandwidth management implementation differs across Switch models.
• Some models use a single command (bandwidth-limit ingress) to control the
incoming rate of traffic on a port.
• Other models use two separate commands (bandwidth-limit cir and
bandwidth-limit pir) to control the Committed Information Rate (CIR) and the
Peak Information Rate (PIR) allowed on a port.
The CIR and PIR should be set for all ports that use the same uplink bandwidth. If the CIR
is reached, packets are sent at the rate up to the PIR. When network congestion occurs,
packets through the ingress port exceeding the CIR will be marked for drop.
The CIR should be less than the PIR.
See Section 8.2 on page 42 and Section 8.3 on page 43 for examples.
See also Chapter 77 on page 293 for information on how to use trTCM (Two Rate Three Color
Marker) to control traffic flow.
8.1 Command Summary
The following table describes user-input values available in multiple commands for this
feature.
Table 23 User-input Values: running-config
COMMAND DESCRIPTION
port-list The port number or a range of port numbers that you want to configure.
rate The rate represents a bandwidth limit. Different models support different rate
limiting incremental steps. See your User’s Guide for more information.
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