Bandwidth - Cisco ME 3400 Command Reference Manual

Chapter 2 Cisco ME 3400 Ethernet Access Switch Cisco IOS Commands

bandwidth

Use the bandwidth policy-map class configuration command to configure class-based weighted fair
queuing (CBWFQ) by setting the output bandwidth for a policy-map class. Use the no form of this
command to remove the bandwidth setting for the class.
Syntax Description
rate
percent value
remaining percent value
Defaults
No bandwidth is defined.
Command Modes Policy-map class configuration
Command History Release
12.2(25)EX
12.2(25)SEG
Usage Guidelines
You use the bandwidth policy-map class command to control output traffic. The bandwidth command
specifies the bandwidth for traffic in that class. CBWFQ derives the weight for packets belonging to the
class from the bandwidth allocated to the class and uses the weight to ensure that the queue for that class
is serviced fairly. Bandwidth settings are not supported in input policy maps.
When you configure bandwidth for a class of traffic as an absolute rate (kbps) or a percentage of
bandwidth (percent value), it represents the minimum bandwidth guarantee or committed information
rate (CIR) for that traffic class. This means that the traffic class gets at least the bandwidth specified in
the command, but is not limited to that bandwidth. Any excess bandwidth on the port is allocated to each
class in the same ratio as the configured CIR rates.
When you enter the bandwidth remaining percent command, hard bandwidths are not guaranteed, and
only relative bandwidths are assured. Class bandwidths are always proportional to the specified
bandwidth percentages configured for the port.
When you configure bandwidth in an output policy, you must specify the same units in each bandwidth
configuration; that is, all absolute values (rates) or percentages.
OL-9640-07
bandwidth {rate | percent value | remaining percent value}
no bandwidth [rate | percent value | remaining percent value]
Modification
This command was introduced.
Support was added to configure the bandwidth command in the
class-default of an output policy map.
Set the bandwidth rate for the class in kilobits per second (kbps).
The range is from 64 to 1000000.
Set the bandwidth for the class as a percent of the total bandwidth.
The range is from 1 to 100 percent.
Set the bandwidth for the class as a percent of the remaining
bandwidth. The range is from 1 to 100 percent.
Cisco ME 3400 Ethernet Access Switch Command Reference
bandwidth
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