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Configuring QoS Using Condition Groups in Policies

OmniSwitch 6800/6850/9000 Network Configuration Guide June 2006 page 26-43

• It is also possible to configure a minimum and maximum bandwidth value for individual egress port

queues. See “Configuring the Egress Queue Minimum/Maximum Bandwidth” on page 26-22 for more

information.

• The bandwidth limit configured using the qos port maximum bandwidth command takes precedence

over an egress queue limit configured on the same port.

The following subsections provide examples of ingress maximum bandwidth policies using both source

and destination port groups.

Example 1: Source Port Group

In the following example, a port group (pgroup) is created with two ports and attached to a policy condi-

tion (Ports). A policy action with maximum bandwidth is created (MaxBw). The policy condition and

policy action are combined in a policy rule called PortRule.

-> policy port group pgroup 1/1-2

-> policy condition Ports source port group pgroup

-> policy action MaxBw maximum bandwidth 10k

-> policy rule PortRule condition Ports action MaxBw

In this example, if both ports 1 and 2 are active ports, the 10000 bps maximum bandwidth is shared by

both ports. In other words, maximum bandwidth policies for port groups define a maximum bandwidth

value that is a total bandwidth amount for all ports, not an amount for each port.

Example 2: Destination Port Group

In the following example, a port group (pgroup2) is created with several ports and attached to a policy

condition (Ports2). A policy action with maximum bandwidth is created (MaxBw). The policy condition

and policy action are combined in a policy rule called PortRule2.

-> policy port group pgroup2 1/1 1/25 2/1

-> policy condition Ports2 destination port group pgroup2

-> policy action MaxBw maximum bandwidth 10k

-> policy rule PortRule2 condition Ports2 action MaxBw

In this example, the specified ports for pgroup2 span across two slots. As a result, the maximum band-

width limit specified by the policy action is increased to 20K for all of the ports. The bandwidth limit is

increased by multiplying the number of slots by the specified bandwidth value.

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