Total Access 5000 Business Services Deployment Guide
6-24 65K510DEP08-1A
Provision Policers in the NetVanta 800
Thissubsectiondetailsthefollowing information:
• DefinitionofPolicers
•StepsforconfiguringPolicers
•Policerexample
Policer Definition
Policingisaratebasedadmissioncontrolfunctionutilizingaleakybucketalogrithm(see
Figure6‐3).Apolicerkeepsnon‐conformanttrafficfromenteringthenetworkanddegrading
othercustomersand/orservices.
Figure 6-3. Bucket Alogrithm
TheCommittedInformationRate(CIR)equalstherateguaranteedtotheuser.Alltrafficflow
belowthis
rateisconsidered“green”.
TheExcessInformationRate(EIR)equalstherateaboveandbeyondtheCIRthatisallowedto
passthroughthepolicer.Thistrafficismarked“yellow”bysettingtheDEI/CFIbitonthe
802.1qVLAN tag.Ifsettozero,thepolicerisconsideredaonerate
policer(greenonly,no
yellow).Ifsettonon‐zero,thepolicerisconsideredatworatepolicer.
INGRESS
CBS
EBS
CIR
EIR
Dropped