Users Guide

Conguring Policy-Based Rate Shaping
To congure policy-based rate shaping, use the following command.
• Congure rate shape egress trac.
QOS-POLICY-OUT mode
rate-shape
Allocating Bandwidth to Queue
Schedule packets for egress based on Decit Round Robin (DRR). These strategies both oer a guaranteed data rate.
The following table lists the default bandwidth weights for each queue, and their equivalent percentage which is derived by dividing
the bandwidth weight by the sum of all queue weights.
Table 56. Default Bandwidth Weights
Queue Default Weight Equivalent Percentage
0 1 6.67%
1 2 13.33%
2 4 26.67%
3 8 53.33%
• Allocate bandwidth to queues.
bandwidth-percentage
Specifying WRED Drop Precedence
• Specify a WRED prole to yellow and/or green trac.
QOS-POLICY-OUT mode
wred
For more information, refer to Applying a WRED Prole to Trac.
Create Policy Maps
There are two types of policy maps: input and output.
Creating Input Policy Maps
There are two types of input policy-maps: Layer 3 and Layer 2.
1. Create a Layer 3 input policy map.
CONFIGURATION mode
policy-map-input
Create a Layer 2 input policy map by specifying the keyword layer2 with the policy-map-input command.
2. After you create an input policy map, do one or more of the following:
Applying a Class-Map or Input QoS Policy to a Queue
Applying an Input QoS Policy to an Input Policy Map
Honoring DSCP Values on Ingress Packets
Honoring dot1p Values on Ingress Packets
3. Apply the input policy map to an interface.
Quality of Service (QoS)
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