Which statement describes the functionality of traffic shaping on a vSphere Standard Switch?

Which statement describes the functionality of traffic shaping on a vSphere Standard Switch?

A.
vSphere Standard Switches support only egress traffic shaping.

B.
vSphere Standard Switches support both ingress and egress traffic shaping.

C.
vSphere Standard Switches support best-effort traffic shaping based on quality of service (QoS).

D.
vSphere Standard Switches support only ingress traffic shaping.

13 Comments on “Which statement describes the functionality of traffic shaping on a vSphere Standard Switch?

  1. dinh says:

    B is correct

    vss send and reveive
    A traffic shaping policy is defined by average bandwidth, peak bandwidth, and burst size. You can establish a traffic shaping policy for each port group and each distributed port or distributed port group.

    ESXi shapes outbound network traffic on standard switches and inbound and outbound traffic on distributed switches. Traffic shaping restricts the network bandwidth available on a port, but can also be configured to allow bursts of traffic to flow through at higher speeds.

    Average Bandwidth

    Establishes the number of bits per second to allow across a port, averaged over time. This number is the allowed average load.

    Peak Bandwidth

    Maximum number of bits per second to allow across a port when it is sending or receiving a burst of traffic. This number limits the bandwidth that a port uses when it is using its burst bonus.

    Burst Size

    Maximum number of bytes to allow in a burst. If this parameter is set, a port might gain a burst bonus if it does not use all its allocated bandwidth. When the port needs more bandwidth than specified by the average bandwidth, it might be allowed to temporarily transmit data at a higher speed if a burst bonus is available. This parameter limits the number of bytes that have accumulated in the burst bonus and transfers traffic at a higher speed.

    1. Dot says:

      Dinh. Your post only confirms that A is correct.

      “ESXi shapes outbound network traffic on standard switches and inbound and outbound traffic on distributed switches.” – Notice how it says that ESXi shapes inbound only on dvs.

  2. Khan says:

    Agreed above, the answer should be A as vSphere Standard switches only do outbound “Egress” and the vSphere Distributed variety does both “Ingress and Egress”. Please change the answer moderator? Even Dinh agrees above, they just don’t know it. 😛

  3. Scott says:

    A is the correct answer… Outbound traffic is all that can be shaped on standard switches period…

    vdistributed switches support both egress and ingress shaping…

    please fix the answer to A please Admin.


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