User's Manual

Possibleactions:
-Discardtheframe
-Passtheframeand
sendflowcontrolframe
backtothesource
-Passthetraffic
EBS:ExcessBurstSize
CBS:CommittedBurstSize
CIR:CommittedInformationRate
Allbucketcalculations
doneinunitsoftokens
Passedframesize
basedtokenupdate
EBSLimit
CBSLimit
CIR
Fig. 7.26: Leaky bucket
Primary key
The live data icon indicates which parameter field is taken as the unique identifier
in the database. This field entry ensures each record is unique and must not be
duplicated.
Ports Eth1, Eth2, CPU, Air. See Port status.Port name
Id
Each port can be assigned up to five different ingress rate resources.
Each resource defines a rule (filter) for the incoming frame. If the rule is met, the
frame is affected (as set by the EBS limit action parameter). If the incoming frame
doesn't meet any rule, it is not affected by PIRL. The frame is accepted and forwar-
ded further to the switch engine.
CIR (estimated)
The Committed Information Rate (CIR) is dependent on the Bucket Rate factor and
the Bucket increment.
The calculation is estimated as the real data throughput depends on frame size.
The Accounted bytes parameter affects this as well.
The formula for the CIR (in bits per second) is as follows: CIR = a * BRF / BI.
Where "a" is constant, which is 12 500 000 for Accounted bytes="frame", and is
100 000 000 for Accounted bytes="layer1". BRF is Bucket Rate factor and BI is
Bucket increment.
Bucket rate
factor
This is a factor which determines the amount of tokens that need to be decremented
for each rate resource decrement (which is done periodically based on the Com-
mitted Information Rate).
Bucket
increment
Bucket increment (BI) indicates the amount of tokens that need to be added for
each byte of the incoming frame.
Mode
Rate type or Traffic type of rate limiting. See Bucket type parameter.
Edit
Press Edit to edit selected PIRL resource.
Delete
Press Delete to delete selected PIRL resource.
Add resource
Press Add resource button to add another PIRL resource.
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