QoS Packet Starvation

Created Apr 05, 2014 02:52:30Latest reply Apr 08, 2014 06:43:50 1322 1 0 0

Hi dears,


Suppose I use NE40E-X3 router and I implement PQ scheduling for EF VoIP flow and WFQ scheduling for AF flows. According the documentation, EF flow will be scheduled first, but it is good to limit its bandwidth in order to avoid packets starvation of lower priority flows, such as AF.

Checking HedEx and for NE40E-X3, I can only use the command using shaping, like this


interface gigabitethernet6/0/6

 port-queue ef pq shaping 100 outbound


By using this command EF flow will be limit, but also will be shaped and then delayed, which is not good for real-time flows such as EF flow. It happen the same for others devices, for instance, S9300 series.

Does this mean EF flow can't be rate limit without delay and low priority flows will suffer packets starvation?


Thanks in advance,


  • x
  • convention:

f80029566     Created Apr 08, 2014 06:43:50 Helpful(0) Helpful(0)



¿Any answer?




  • x
  • convention:


You need to log in to reply to the post Login | Register

Notice:To ensure the legitimate rights and interests of you, the community, and third parties, do not release content that may bring legal risks to all parties, including but not limited to politically sensitive content, content concerning pornography, gambling, drug abuse and trafficking, content that may disclose or infringe upon others' intellectual properties, including commercial secrets, trade marks, copyrights, and patents, and personal privacy. Do not share your account and password with others. All operations performed using your account will be regarded as your own actions and all consequences arising therefrom will be borne by you. For details, see“ Privacy Policy.”
If the attachment button is not available, update the Adobe Flash Player to the latest version!
Fast reply Scroll to top