Configuring Egress Shaping per Queue

In addition to limiting transmission rate per port, which is done in the Bandwidth page, the switch can limit the transmission rate of selected egressing frames on a per-queue per-port basis. Egress rate limiting is performed by shaping the output load.

The switch limits all frames except for management frames. Any frames that are not limited are ignored in the rate calculations, meaning that their size is not included in the limit total.

Per-queue Egress rate shaping can be disabled.

To define egress shaping per queue:

  1. Click Quality of Service > General > Egress Shaping per Queue. The Egress Shaping Per Queue page opens.
  2. The Egress Shaping Per Queue page displays the rate limit and burst size for each queue.

  3. Select an interface type (Port or LAG), and click Go. The list of Ports/LAGs is displayed.
  4. Select a Port/LAG, and click Edit. The Edit Egress Shaping Per Queue page opens.
  5. This page enables shaping the egress for up to four queues on each interface.

  6. Select the Interface.
  7. For each queue that is required, enter the following fields:
    • Enable Shaping--Select to enable egress shaping on this queue.
    • Committed Information Rate (CIR)--Enter the maximum rate (CIR) in Kbits per second (Kbps). CIR is the average maximum amount of data that can be sent.
    • Committed Burst Size (CBS)--Enter the maximum burst size (CBS) in bytes. CBS is the maximum burst of data allowed to be sent even if a burst exceeds CIR.
  8. Click Apply. The bandwidth settings are modified, and the Running Configuration file is updated.