Table 11: Policy Action Applied Based On Rate Settings And Traffic Rate - Juniper POLICY MANAGEMENT - CONFIGURATION GUIDE V11.1.X Configuration Manual

Peak rate Amount of bandwidth allocated to accommodate excess traffic flow
over the committed rate
Peak burst Amount of bandwidth allocated to accommodate bursty traffic in
excess of the peak rate
Committed action Drop, transmit, conditional, unconditional, final, mark (IP
and IPv6), or mark-exp (MPLS) when traffic flow does not exceed the committed
rate; the mark value is not supported for hierarchical rate limits and the transmit
values conditional, unconditional, or final are only supported on hierarchical rate
limits
Conformed action Drop, transmit, mark (IP and IPv6), or mark-exp (MPLS)
when traffic flow exceeds the committed rate but remains below the peak rate;
the mark value is not supported for hierarchical rate limits and the transmit
values conditional, unconditional, or final are only supported on hierarchical rate
limits
Exceeded action Drop, transmit, mark (IP and IPv6), or mark-exp (MPLS) when
traffic flow exceeds the peak rate; the mark value is not supported for hierarchical
rate limits and the transmit values conditional, unconditional, or final are only
supported on hierarchical rate limits
Mask value Mask to be applied with mark values for the ToS byte; applicable
only to IP and IPv6 rate-limit profiles; not supported on hierarchical rate limits
EXP mask value Mask to be applied with mark-exp values; applicable only to
MPLS rate-limit profiles; not supported on hierarchical rate limits
Table 11 on page 87 indicates the interaction between the rate settings and the actual
traffic rate to determine the action taken by a rate-limit rule in a policy when applied
to a traffic flow. This implementation is known as a two-rate, three-color marking
mechanism.

Table 11: Policy Action Applied Based on Rate Settings and Traffic Rate

Peak Rate Committed Rate = 0
Peak rate = 0 All traffic assigned the exceeded
action
Peak rate not 0 Traffic <= peak rate assigned
the conformed action
Traffic > peak rate assigned the
exceeded action
Table 12 on page 88 presents equations that can represent the algorithm for the
two-rate rate-limit profile, where:
Chapter 5: Creating Rate-Limit Profiles
Committed Rate Not 0
Traffic <= committed rate
assigned the committed action
Traffic > committed rate
assigned the exceeded action
Traffic <= committed rate
assigned the committed action
Committed rate < Traffic <
peak rate assigned the
conformed action
Traffic > peak rate assigned the
exceeded action
Two-Rate Rate-Limits Overview
87