Verifying a DiffServ Configuration

To verify a DiffServ configuration, perform the following tasks:

Purpose

Verify that the Services Router is listening to the appropriate groups for multicast Session Announcement Protocol (SAP) session announcements.

Action

From the CLI, enter the show sap listen command.

Sample Output

Group Address   Port
224.2.127.254   9875

What it Means

The output shows a list of the group addresses and ports that SAP and SDP listen on. Verify the following information:

• Each group address configured, especially the default 224.2.127.254, is listed.
• Each port configured, especially the default 9875, is listed.

For more information about show sap listen, see the JUNOS Protocols, Class of Service, and System Basics Command Reference.

Purpose

Verify the adaptive shaper trigger point and its associated transmit rate. Verify the class-of-service (CoS) configuration associated with an interface.

Action

From the CLI, enter the show class-of-service adaptive-shaper and show class-of-service interface t1-0/0/2 commands.

Sample Output

Adaptive shaper: fr-shaper, Index: 35320
  Trigger type    Shaping rate
        BECN         64000 bps

Physical interface: t1-0/0/2, Index: 137
Queues supported: 8, Queues in use: 4
  Scheduler map: , Index: 2

  Logical interface: t1-0/0/2.0, Index: 69
    Object            Name                   Type                    Index
    Adaptive-shaper   fr-shaper                                      35320
    Classifier        ipprec-compatibility   ip                         11

What it Means

Verify the following information:

• The trigger type and shaping rate are consistent with the configured adaptive shaper.
• The adaptive shaper applied to the logical interface is displayed under Name.