Provision Policers In The Netvanta 800; Policer Definition; Figure 6-3. Bucket Alogrithm - ADTRAN Total Access 5000 Deployment Manual

Total Access 5000 Business Services Deployment Guide

Provision Policers in the NetVanta 800

This subsection details the following information:
• Definition of Policers
• Steps for configuring Policers
• Policer example

Policer Definition

Policing is a rate based admission control function utilizing a leaky bucket alogrithm (see
Figure 6‐3). A policer keeps non‐conformant traffic from entering the network and degrading
other customers and/or services.
The Committed Information Rate (CIR) equals the rate guaranteed to the user. All traffic flow
below this rate is considered "green".
The Excess Information Rate (EIR) equals the rate above and beyond the CIR that is allowed to
pass through the policer. This traffic is marked "yellow" by setting the DEI/CFI bit on the
802.1q VLAN tag. If set to zero, the policer is considered a one rate policer (green only, no
yellow). If set to non‐zero, the policer is considered a two rate policer.
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INGRESS
CBS

Figure 6-3. Bucket Alogrithm

CIR
Dropped
EBS
EIR
65K510DEP08-1A