Reference Guide

Storm control
Trac storms created by packet ooding or other reasons may degrade the performance of the network.
The storm control feature allows you to control unknown unicast, multicast, and broadcast trac on Layer 2 and Layer 3 physical
interfaces.
OS10 device monitors the current level of trac rate at xed intervals, compares the trac rate with congured levels, and drops excess
trac.
By default, storm control is disabled on all interfaces. You can enable storm control using the storm-control { broadcast |
multicast | unknown-unicast } rate-in-pps command in the INTERFACE mode.
Congure storm control
• The following example enables broadcast storm control with a rate of 1000 packets per second (pps) on Ethernet 1/1/1.
OS10(conf-if-eth1/1/1)# storm-control broadcast 1000
QoS commands
bandwidth
Assigns a percentage of weight to the queue.
Syntax
bandwidth percent value
Parameters percent value — Enter the percentage assignment of bandwidth to the queue (1 to 100).
Default Not congured
Command Mode POLICY-MAP QUEUE
Usage Information If you congure this command, you cannot use the priority command for the class.
Example
OS10(conf-pmap-que)# bandwidth percent 70
Supported Releases 10.2.0E or later
class
Creates a QoS class for a type of policy-map.
Syntax
class class—name
Parameters class-name — Enter a name for the class-map (up to 32 characters).
Default Not congured
Command Mode POLICY-MAP-QUEUEING
Usage Information If you dene a class-map under a policy-map, the type (qos, queuing, or control-plane) is the same as the
policy-map. You must create this map in advance. The only exception to this rule is when the policy-map type is
trust, where the class type must be qos.
564 Quality of service