ADTRAN Total Access 5000 - Cbs; Ebs; Eir; Example #1: Ingress Bandwidth Policer Per UNI

Total Access 5000 Business Services Deployment Guide
F-16 65K510DEP08-1A
CBS
TheCBSisthemaximumavailablebytesforaburstofingresstrafficsentattheUNIspeed
whilestillconformingtotheCIR.
EIR
TheEIRdefinestheaveragerateinkilobitpersecond(kbps)ofserviceframesuptowhichthe
networkcandeliverserviceframesbutwithoutanperformanceobjectives.Serviceframes
allowedbytheEIRarecoloredyellow.
EBS
TheEBSisthemaximumavailablebytesforaburstofingresstrafficsentattheUNIspeed
whilestillconformingtotheEIR.
Example #1: Ingress Bandwidth Policer per UNI
Asinglebandwidthpolicercanbe appliedtoallingressframesatadesignatedUNI.Thistype
ofpolicermanagesbandwidthnon‐discriminatelyforallEVCsthatareassociatedwiththe
UNI.Dependingontheconfigurationandtrafficconditionsduringperiodsofcongestion,
someEVCsgetmorebandwidthwhileothersget
lessbandwidthifmultipleEVCsare
associatedwiththeUNI.
Considertheconditionsof“Example#1:TwoCE‐VLANsMappedtoTwoEVCs”onpage F‐
10,wheretrafficfortwocustomerVLANsisreceivedatthesameUNIportandmappedto
twodifferentEVCs.
Thefollowingpolicerwouldcollectivelyapply
toallframesthatingressatEthernet1/0/1(for
example,thetwocustomerVLANs).Thepolicerwouldgiveatotalof5Mbpswith2Mbps
consideredgreenand3Mbpsconsideredyellow.
Policer#1:
•CIR/EIRCoupling=Disabled
• CommittedInformationRate(CIR)=2000kbps
•ExcessInformationRate(EIR)=3000kbps
• CommittedBurstSize
(CBS)=3125bytes
•ExcessBurstSize(EBS)=12500bytes
•Mode=PerUNI
•UNI=Ethernet1/0/1
Policer#1isappliedtoingresstrafficofbothEVC‐map#1andEVC‐map#2becausetheseEVC
mapshaveEthernet1/0/1definedastheUNIport.
Example #2: Ingress Bandwidth Policer per EVC
Asinglebandwidthpolicercanbeappliedtoallingressframesthataremappedtoadesig‐
natedEVC.IftrafficismappedfromaUNItotwoEVCs,thenonepolicercanbedefinedfor
eachEVC.
Considertheconditionsof“Example#1:TwoCE‐VLANsMappedtoTwoEVCs”
onpage F‐
10,wheretwocustomerVLANsarereceived atthesameUNIportandmappedtotwo
differentEVCs.