Manual Chapter :
Rate Shaping with srTCM Policers
Applies To:
Show Versions
BIG-IP AAM
- 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
BIG-IP APM
- 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
BIG-IP Analytics
- 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
BIG-IP Link Controller
- 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
BIG-IP LTM
- 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
BIG-IP PEM
- 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
BIG-IP AFM
- 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
BIG-IP DNS
- 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
BIG-IP ASM
- 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
Rate Shaping with srTCM Policers
About Single Rate Three Color Marker Policers
A
Single Rate Three Color Marker (srTCM) policer
meters an IP packet stream
and classifies the packets as either green, yellow, or red. An srTCM policer is useful, for
example, for ingress policing of a service, where only the length, not the peak rate, of the
burst determines service eligibility.The srTCM color classification is based on specific values that you define:
- Committed Information Rate (CIR)
- This is the rate, in bytes per second, that you want the BIG-IP® system to commit to the guest. For packets that are part of a flow consuming less than or equal to the CIR value, the system classifies the packets asgreen.
- Committed Burst Size (CBS)
- This is a burst size, in bytes, that you want the system to commit to the guest beyond the CIR value. For packets that are part of a burst into the allocated CBS value, the system classifies the packets asyellow.
- Excess Burst Size (EBS)
- This is a data burst size, in bytes, that exceeds the CIR and CBS values and that you want the system to classify as excessive. For packets that are part of a burst into the specified EBS value, the system classifies the packets asredand might drop them.
In general, when you configure an srTCM policer, the BIG-IP system classifies a packet as
green
if the packet size does not exceed the CBS, yellow
if
the packet size exceeds the CBS but not the EBS, and red
otherwise.SrTCM policers that you create run in color-blind mode only. In
color-blind
mode, the policer ignores any color classifications that might have
been previously set on IP packets coming into the BIG-IP system.Creating a Single Rate Three Color Marker policer
You can create a Single Rate Three Color Marker (srTCM) policer when you want the
BIG-IP system to meter an IP packet stream and classify the packets as either green,
yellow, or red. An srTCM policer is useful, for example, for ingress policing of a
service, where only the length of the burst, and not the peak rate of the burst,
determines service eligibility.
- On the Main tab, click .The screen displays a list of Single Rate Three Color Marker (srTCM) policers.
- In theCommitted Information Ratefield, type a rate, in bytes per second, that you want the system to commit to the guest.An example of a CIR value is50000000.For packets that are part of a flow consuming less than or equal to theCommitted Information Ratevalue, the system classifies the packets asgreen.
- In theCommitted Burst Sizefield, type a burst size, in bytes, that you want the system to commit to the guest beyond theCommitted Information Ratevalue.An example of a CBS value is1000000.For packets that are part of a burst into the allocatedCommitted Burst Sizevalue, the system classifies the packets asyellow.
- In theExcess Burst Sizefield, type a data burst size, in bytes, that exceeds theCommitted Information RateandCommitted Burst Sizevalues and that you want the system to classify as excessive.An example of an EBS value is2000000.For packets that are part of a burst into the specifiedExcess Burst Sizevalue, the system classifies the packets asRedand might drop them.
- From theActionlist, select the action that you want the system to perform when the system classifies packets as red:
- SelectNonewhen you want the system to take no action, regardless of color classification.
- SelectDropwhen you want the system to drop packets classifed as red.
- ClickFinished.
After you perform this task, the BIG-IP system includes an srTCM policer, in
color-blind mode, that you can apply to network traffic.
