Percent-Based Rates For Rate-Limit Profiles Overview; Policy Parameter Reference-Rate - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - POLICY MANAGEMENT CONFIGURATION GUIDE 2010-10-04 Configuration Manual

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Percent-Based Rates for Rate-Limit Profiles Overview

Policy Parameter Reference-Rate

Copyright © 2010, Juniper Networks, Inc.
dependent, the actual value is configured where the packet entered the hierarchy;
however, the color is set by the entire rate-limit hierarchy.
We recommend that all rate-limit profiles that receive transmit unconditional packets
should be color-aware. If not color-aware, yellow transmit unconditional packets are
processed through both the green and yellow token buckets; if the green rate is low, this
causes an oversubscription of transmit unconditional packets and leads to saturation.
By making the rate limit color-aware, the yellow transmit unconditional packets ar counted
only against the yellow token bucket.
color
color-aware
color-mark-profile
green-mark
red-mark
yellow-mark
Percent-based rate-limit profiles enable you to divide the reference rate as percentages
instead of specific values. You can specify the reference rate on each interface and specify
these rates in terms of percentage of this reference rate within the rate-limit profile to
derive the appropriate rate. This enables you to define rate-limit profiles with rates in
terms of percentage and bursts in terms of milliseconds.
You can use percent-based rate-limit profiles to:
Configure rates in rate-limit profiles based on a percentage of a parameter. You can
assign values to these parameters at the time of attachment, which enables you to
use the same policy for multiple interfaces with different parameter values.
Specify burst sizes in milliseconds when you configure percent-based rate-limits.
Provide a generic way to configure and use policy parameters. You can use parameter
names when you create policy objects and defer assigning values to these parameters
until policy attachment. This enables you to share policy objects by attaching the same
policy at multiple interfaces with different parameter values. You do not have to specify
values each time you attach a policy; if you do not specify interface-specific, the system
uses the global value.
You can use a policy parameter reference-rate to derive the rates in rate-limit profiles.
You can configure rate-limit profiles as a percentage of this parameter. The system
calculates the rate at the time of attachment using the value assigned to this parameter
for that interface.
Chapter 5: Creating Rate-Limit Profiles
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