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Home Forums QoS Traffic Policing Explained

This topic contains 16 replies, has 9 voices, and was last updated by   Rene Molenaar 1 month, 1 week ago.

Viewing 15 posts - 1 through 15 (of 16 total)
  • Author
    Posts
  • #13791

    Mohan

    Very Nice Article. Appreciate it!

    #13792

    Rendra

    how about hierarchical tocken bucket (HTB)? how many bucket that we use in HTB, and how the policier take the token from the bucket

    #13793

    SP

    Hi Rene,
    Nice explanation. I have one query though.
    With the single rate tri colour policing, if we don’t mention the bc and be values in the cli command, then they both are same. If we have a single burst which is exceeding bc value, then what will happen? Since be is also same as bc will the packet be dropped ( considering that this has violated ) or will the packet pass through if the number of tokens in bc+be is more than the burst arriving?

    #13794

    Rene Molenaar
    Keymaster

    Hi SP,

    When you use single rate three colour policing and don’t specify the bc/be values then you will have two buckets that have the same size. When there are not enough tokens in the bc bucket, it will be empty and we will get some extra tokens from the be bucket…you are now exceeding.

    If you send a burst and there are not enough tokens in the bc+be buckets combined, that’s when you are violating and your packet will be dropped.

    #13795

    Franjo P
    Member

    Hi Rene,

    this article and your website in general is awesome! Just one thing, am I missing something or there is no article with configuration of this stuff? You mentioned “I will explain to you how to configure it on a Cisco router.”, but I can’t find it?

    #13796

    Rene Molenaar
    Keymaster

    Hi Franjo,

    Glad to hear you like it! It seems I never did create the configuration tutorial for policing…I’ll create it tomorrow or monday 🙂

    Rene

    #13797

    Wojciech G
    Member

    Hi Rene,

    I look forward to configuaration tutorial mentioned by You. I hope it will happen soon 😉

    #13798

    Rene Molenaar
    Keymaster
    #13799

    Mayamba M
    Participant

    Very clear article, keep up the good work.

    #18823

    Vicchester N
    Participant

    Nice article, and good explanation..

    #20413

    Patrick W
    Participant

    I’ve been having trouble visualizing the different policing/bucket methods and this helped a lot.  Great article!

    #20953

    Davis W
    Participant

    Hi Rene,

    In term of bandwidth control, shape will be better than policer? As Shape will buffer the exceeded traffic but policer will be drop once exceeded.

    Davis

    #21007

    Rene Molenaar
    Keymaster

    Hi Davis,

    It depends what you want to achieve.

    For example, the ISP will probably use policing since they don’t want to waste resources to buffer customer packets exceeding traffic.

    The customer however probably doesn’t want packet drops so they will configure shaping to match the rate that the ISP polices at.

    Also keep in mind that shaping adds delay so it’s not a good idea to use this for realtime traffic like VoIP.

    Rene

    #21044

    Davis W
    Participant

    Hi Rene,

    Got it. Thanks!

    Davis

    #22954

    Muhammad Fahmi B
    Participant

    Hi Rene

    Thanks for the clear explaination.
    However, can you explain the best practice which policer is use for which applications?

    Example: single rate two Colour for voice traffic?

    When will i use singe rate 3 color and when to use dual rate 3 Color?

    Thanks

Viewing 15 posts - 1 through 15 (of 16 total)

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