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Defining Classifiers

Figure 23 shows the initial configuration page for defining classifiers, and Table 31 describes the related fields. Classifiers examine the CoS value or alias of an incoming packet and assign it a level of service by setting its forwarding class and loss priority. For more information about classifiers, see the Junos OS Class of Service Configuration Guide.

To define classifiers in the J-Web interface:

  1. Select Configure > Class of Service > Classifiers.

    Note: After you make changes to the configuration in this window, you must commit the changes immediately for them to take effect. To commit all changes to the active configuration, select Commit Options > Commit. See Using the Commit Options to Commit Configuration Changes (J-Web Procedure) for details about all commit options.

  2. Click one of the following:

Note: The user cannot edit or delete default classifiers.

Figure 23: Classifiers Configuration Page

Classifiers Configuration

Table 31: Classifiers Configuration Fields



Your Action

Classifier name

Specifies the name of a classifier.

To name a classifier, type the name; for example, ba-classifier.

Classifier type

Specifies the type of classifier: dscp, ieee-802.1 or inet-precedence.

Select a value from the list.

Code point mapping

Sets the forwarding classes and the packet loss priorities (PLPs) for specific CoS values and aliases.

To add a code-point mapping:

  1. Click Add.
  2. Select the code point.
  3. Select a forwarding class from the following list:
    • expedited-forwarding—Provides low loss, low delay, low jitter, assured bandwidth, and end-to-end service. Packets can be forwarded out of sequence or dropped.
    • best-effort—Provides no special CoS handling of packets. Typically, RED drop profile is aggressive and no loss priority is defined.
    • assured-forwarding—Provides high assurance for packets within the specified service profile. Excess packets are dropped.
    • network-control—Packets can be delayed but not dropped.
  4. Select the loss priority:
    • high—Packet has a high loss priority.
    • low—Packet has a low loss priority.

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