Classify RTP Traffic

Interactive Realtime Transport Protocol (RTP) traffic can be further classified by media type, encoding name, or clock rate. For example, you can differentiate between different audio and video streams. Or, you could set the encoding name to a value such as G729, PCMA, GSM, or JPEG so that you can manage streams differently based on how they are encoded.

Note: To perform this task from PolicyCenter, you must first select a group and/or unit configuration from the Group: and Unit: drop-down lists at the top of the page.

To classify interactive RTP traffic:

1. Click the manage tab.

2. In the left window pane, select the class or folder that will be the parent of the class you are about to define.

3. Click class and select add.

Warning: If the Easy Configure feature is enabled, the class must be placed as a child of one of the Easy Configure folders (that is, MissionCritical, Average, LowPriority, or Prohibited). PacketWise may not classify traffic properly for classes created outside of these folders. See Easy Configure Recommendations for more information.

4. In the Name field, type a descriptive name (up to 31 characters; hyphens, underscores, and periods are acceptable).

5. For the Service, select RTP-I.

6. Scroll down to the Criterion field, and select Encoding Name, Media Type or Clock Rate from the drop-down list.  show screen

7. If you selected Encoding Name for the criterion, specify the encoding name in the empty text field. For a list of encoding names, go to ietf.org and look up RFC 1890.

Note: PCMA and PCMU are both specified in CCITT/ITU-T recommendation G.711. To specify G.711 encoding, enter either PCMA (Pulse Code Modulation a-law) or PCMU (Pulse Code Modulation mu-law) for the Encoding Name.

or

If you selected Media Type, type a for audio or v for video in the text field.

or

If you selected Clock Rate, type 8000, 16000, 44100, or 90000.

8. Click add class.

For more information about the other entries in the New Traffic Class window, see Matching Rules.

Note: A matching rule can contain only one application-specific criterion. To combine multiple criteria, use two traffic classes, a parent and a child.