CANOGA PERKINS 9145E NID Software Version 4.10 - Manual (Page 279)

Bandwidth Profiling 9145E NID Software User’s Manual
Bandwidth Profiles
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Chapter 13
Bandwidth Profiling
This chapter describes the Ethernet Traffic engineering features available in this release of the
9145E.
13.1 Bandwidth Profiles
Bandwidth Profiling is based on the two-rate three-color marking scheme found in MEF 10.2.
This algorithm defines six parameters: CIR, CBS, EIR, EBS, CF and CM. Each frame is
associated with a single ingress and/or a single egress Bandwidth Profile (BWP). The algorithm
determines the level of a frame's compliance to the BWP by marking it Green, Yellow or Red.
A bandwidth profile is a passive entity that characterizes a certain traffic flow. The entity is
passive because, by itself, a bandwidth profile does not affect the traffic in any way; it must be
attached to a policer or a shaper in order to produce effects on the traffic.
A bandwidth profile record contains:
• A unique numerical identifier, between 1 and 4096; the profile is associated with a shaper
or policer using this numerical identifier.
• A unique bandwidth profile name, for your reference.
• A bandwidth profile type, either a policing profile or a shaping profile.
• Committed Information parameters:
• Committed Information Rate (CIR) is expressed in kilobits (Kbits) per second. It
defines the average rate in Kbits of service frames up to which the network deliv-
ers and meets the performance objectives defined by the CoS Service Attribute.
CIR must be greater than or equal to 0. CIR must be multiple of 64Kbit/s, or 1Mbit/
s. When CIR is 0, CBS must also be zero and EIR and EBS cannot be zero.
• Committed Burst Size (CBS) is expressed in kilobytes (Kbytes). CBS limits the
maximum number of Kbytes available for burst frames sent at the line speed to
remain CIR-conformant. This represents the maximum number of tokens in the
CIR token bucket. CBS accepts an input range of 10-254 in increments of 2.
When CBS is 0, CIR must also be zero and EIR and EBS cannot be zero.