ADTRAN Total Access 5000 - Provision Policers in the Netvanta 838; Policer Definition; Figure 4-2. Bucket Alogrithm

Section 4, EoCu Provisioning - Provision Policers in the NetVanta 838
65K510DEP08-1A 4-27
Provision Policers in the NetVanta 838
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4‐2).Apolicerkeepsnon‐conformanttrafficfromenteringthenetworkanddegrading
othercustomersand/orservices.
Figure 4-2. Bucket Alogrithm
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.
INGRESS
CBS
EBS
CIR
EIR
Dropped