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Forum Replies

  1. This is one awesome posts about QoS policing and shaping .U don't find like this many out there.And I should thank U for this.
    BTW, I have few questions reg this,

    1.In this example that you have demonstrated on what basis the Tc (Time Interval) value was chosen. i,e 62.5 in this case ? (62.5 + 62.5 =125).Is there any logic behind it?

    Expecting the earliest reply..

    Thanks in Advance,
    SVP

  2. system says:

    May i know, at which cases Policer will be usefull ? At which situation we can use both Policer & shaping ?

  3. sims says:

    Hi,
    If i have one gb bandwidth and the source transmitting only 5 Mb,still do I need to work on qos
    thanks

  4. Please help me out to implement QoS over ADSL link. I want to prioritize my voice traffic and assign 15% of BW.
    Please check the config of my usual WAN link not sure what would be on ADSL.

    class-map match-any Client-Signal-Class
     match precedence 3
     match ip dscp af31
     match ip dscp cs3
    class-map match-any Client-VOIP-Class
     match precedence 5
     match ip dscp ef
    !
    policy-map 50Mb-VOIP-PMAP
     class Client-VOIP-Class
      priority percent 10
     class Client-Signal-Class
      bandwidth percent 5
     class class-default
      fair-queue
    policy-map 50Mb-VOIP
     class class-default
      shape average 49000000 504000
       service-policy 50Mb-VOIP-PMAP
    

    Not sure what would be the shaping reference BW (Here - 49000000) on ADSL link. Your prompt reply highly appreciated.

  5. This example looks correct. You are shaping to 49 Mbit, with a Bc of 504000 you have a Tc of ~11ms which is fine. On Cisco IOS, you have to configure the shaper first and then use a sub-policy with LLQ like you did…10% priority queue for RTP and 5% (CBWFQ) for your signaling traffic.

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