Bandwidth - Cisco Catalyst 4500 Series Command Reference Manual

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches

bandwidth

To specify or modify the minimum bandwidth provided to a class belonging to a policy map attached to
a physical port, use the bandwidth policy-map class command. To return to the default setting, use the
no form of this command.
Syntax Description
bandwidth-kbps
percent percent
remaining percent percent
Defaults
No bandwidth is specified.
Command Modes
Policy-map class configuration mode
Command History Release
12.2(40)SG
Usage Guidelines Use the bandwidth command only in a policy map attached to a physical port.
The bandwidth command specifies the minimum bandwidth for traffic in that class when there is traffic
congestion in the switch. If the switch is not congested, the class receives more bandwidth than you
specify with this command.
When queuing class is configured without any explicit bandwidth configuration, since the queue is not
guaranteed any minimum bandwidth, this queue will get a share of any unallocated bandwidth on the
port.
If there is no unallocated bandwidth for the new queue or if the unallocated bandwidth is not sufficient
to meet the minimum configurable rate for all queues which do not have any explicit bandwidth
configuration, then the policy association is rejected.
These restrictions apply to the bandwidth command:
•
OL-27596 -01
bandwidth {bandwidth-kbps | percent percent | remaining percent percent}
no bandwidth
Modification
This command was introduced on the Catalyst 4500 series switch using a
Supervisor Engine 6E.
If the percent keyword is used, the sum of the class bandwidth percentages within a single policy
map cannot exceed 100 percent. Percentage calculations are based on the bandwidth available on the
port.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
Amount of bandwidth in kbps assigned to the class. The range is 32 to
16000000.
Percentage of available bandwidth assigned to the parent class. The
range is 1 to 100.
Percentage of remaining bandwidth assigned to parent class. The range
is 1 to 100. This command is supported only when priority queuing class
is configured, and the prioity queuing class is not rate-limited.
bandwidth
2-75