Example: Multiple Flows Sharing A Rate Limit Hierarchical Policy; Figure 3: Multiple Packet Flows Sharing A Rate Limit - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - POLICY MANAGEMENT CONFIGURATION GUIDE 2010-10-04 Configuration Manual

JunosE 11.3.x Policy Management Configuration Guide

Example: Multiple Flows Sharing a Rate Limit Hierarchical Policy

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Figure 3 on page 64 shows an interface that has one rate limit and three classified flows,
A, B, and C. The combined traffic for A, B, and C must be below a peak rate of 4 Mbps,
but each individual flow can burst up to that amount. Statistics can be collected
separately on A, B, and C, while limiting only the aggregate of all three. None of the flows
has any preference in accessing the rate limit, and the rate limit is shared on a first-come
first-serve basis.

Figure 3: Multiple Packet Flows Sharing a Rate Limit

This example uses committed and conformed actions for a preferred rate limit profile
so that the common rate limit drops only exceeded packets (those packets that raise
the traffic load above 4 Mbps); packets below 4 Mbps are transmitted. By specifying
classifier-group * parent-group all, all packets are sent to the parent group. There is no
individual rate limit so that those packet use any available, unused bandwidth in the
parent group rate limit.
host1(config)#rate-limit-profile All two-rate hierarchical
host1(config-rate-limit-profile)#committed-action transmit conditional
host1(config-rate-limit-profile)#conformed-action transmit conditional
host1(config-rate-limit-profile)#exceeded-action drop
host1(config-rate-limit-profile)#peak-rate 40000000
host1(config-rate-limit-profile)#exit
host1(config)#policy-list rlpshare
host1(config-policy-list)#classifier-group A parent-group All
host1(config-policy-list-classifier-group)#forward
host1(config-policy-list-classifier-group)#exit
host1(config-policy-list)#classifier-group B parent-group All
host1(config-policy-list-classifier-group)#forward
host1(config-policy-list-classifier-group)#exit
host1(config-policy-list)#classifier-group C parent-group All
host1(config-policy-list-classifier-group)#forward
host1(config-policy-list-classifier-group)#exit
host1(config-policy-list)#parent-group All
host1(config-policy-list-parent-group)#rate-limit-profile All
host1(config-policy-list-parent-group)#exit
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