Chapter 5 Quality of Service and Bandwidth Management
H.248 Traffic Management Package Support
for either a media flow or signaling flow. Once tman/pol is specified as ON and both the tman/sdr and tman/mbs properties are present, the DBE polices traffic based on the values of the tman/sdr and tman/mbs parameters.
The supported tman properties have the following functions:
•The tman/sdr property defines the sustainable data rate in bytes per second that is permitted for the stream. It has a numerical value.
•The tman/mbs property defines maximum burst size in bytes for the stream. It has a numerical value.
•The tman/pol (policing) property can be set to ON or OFF or Absent.
–When the tman/pol property is set to ON, policing is applied at the point of entry for traffic entering the media gateway (MG).
When both the tman/sdr and tman/mbs properties are present (and the tm/pol property is ON), the DBE polices traffic based on the sdr and mbs Tman parameters.
However, the absence of both tman/sdr and tman/mbs properties is permissible. In this case, the DBE polices traffic based on the Session Description Protocol (SDP).
Note If either the tman/sdr or tman/mbs property is present, then the other property must be present; that is, both the tman/sdr and tman/mbs properties must be present. In this case, the DBE polices traffic based on the sdr and mbs parameters.
–When the tman/pol property is set to OFF, no policing is applied to traffic entering the media gateway.
–If the tman/pol property is Absent, policing is done based on the SDP for the stream for a media flow. No policing is done for a signaling flow.
Note Absent means that the property has not been defined. If no tman properties (tman/pol, tman/sdr, and tman/mbs) have been defined, then the behavior for a media flow is to calculate the required bandwidth from the Session Description Protocol (SDP) in the local descriptor. For a signaling flow, the behavior is to perform no policing.
The tman properties (tman/pol, tman/sdr, and tman/mbs) are defined using Add and Modify requests, and they are returned on subsequent responses to Audit requests.
The tman properties have the following caveat:
The DBE issues error 421 indicating “Unknown action or illegal combination of actions” for any programming containing other fields and programming that sets the tman/pol flag, but only specifies one of the tman/sdr or tman/mbs values.
Table
Cisco IOS XE Integrated Session Border Controller Configuration Guide for the Cisco ASR 1000 Series Aggregation Services Routers
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